Real-Time Performance Monitoring
SUMMARY This section describes the real-time performance monitoring (RPM) feature that allows network operators and their customers to accurately measure the performance of the network between two endpoints.
RPM Overview
With the RPM tool, you configure and send probes to a specified target and monitor the analyzed results to determine packet loss, round-trip time, and jitter.
RPM allows you to perform service-level monitoring. When RPM is configured on a device, the device calculates network performance based on packet response time, jitter, and packet loss. These values are gathered by Hypertext Transfer Protocol (HTTP) GET requests, Internet Control Message Protocol (ICMP) requests, and TCP and UDP requests, depending on the configuration.
This section contains the following topics:
- RPM Probes
- RPM Tests
- Probe and Test Intervals
- Jitter Measurement with Hardware Timestamping
- RPM Statistics
- RPM Thresholds and Traps
- RPM for BGP Monitoring
RPM Probes
You gather RPM statistics by sending out probes to a specified probe target, identified by an IP address or URL. When the target receives the probe, it generates responses, which are received by the device. By analyzing the transit times to and from the remote server, the device can determine network performance statistics.
The device sends out the following probe types:
HTTP GET request at a target URL
HTTP GET request for metadata at a target URL
ICMP echo request to a target address (the default)
ICMP timestamp request to a target address
UDP ping packets to a target device
UDP timestamp requests to a target address
TCP ping packets to a target device
UDP and TCP probe types require that the remote server be configured as an RPM receiver so that it generates responses to the probes.
The RPM probe results are also available in the form of MIB objects through the SNMP protocol.
On SRX300, SRX320, SRX340, SRX1500, SRX4600 devices and vSRX instances, when you configure basic RPM probes, the following combination of the configuration parameters is not supported:
Source address and destination port and next-hop.
Configuring RPM probe with these parameters prevents sending out RPM probes to a specified probe target. We recommend you to configure either the source address or destination port and next-hop to configure RPM probe.
RPM Tests
Each probed target is monitored over the course of a test. A test represents a collection of probes, sent out at regular intervals, as defined in the configuration. Statistics are then returned for each test. Because a test is a collection of probes that have been monitored over some amount of time, test statistics such as standard deviation and jitter can be calculated and included with the average probe statistics.
Probe and Test Intervals
Within a test, RPM probes are sent at regular intervals, configured in seconds. When the total number of probes has been sent and the corresponding responses received, the test is complete. You can manually set the probe interval for each test to control how the RPM test is conducted.
After all the probes for a particular test have been sent, the test begins again. The time between tests is the test interval. You can manually set the test interval to tune RPM performance.
On SRX340 devices, the RPM server operation with icmp is not supported. The RPM server works fine with TCP and UDP.
Jitter Measurement with Hardware Timestamping
Jitter is the difference in relative transit time between two consecutive probes.
You can timestamp the following RPM probes to improve the measurement of latency or jitter:
ICMP ping
ICMP ping timestamp
UDP ping
UDP ping timestamp
The device supports hardware timestamping of UDP ping and UDP ping timestamp RPM probes only if the destination port is UDP-ECHO (port 7).
Timestamping takes place during the forwarding process of the device originating the probe (the RPM client), but not on the remote device that is the target of the probe (the RPM server).
The supported encapsulations on a device for timestamping are Ethernet including VLAN, synchronous PPP, and Frame Relay. The only logical interface supported is an lt services interface.
RPM probe generation with hardware timestamp can be retrieved through the SNMP protocol.
RPM Statistics
At the end of each test, the device collects the statistics for packet round-trip time, packet inbound and outbound times (for ICMP timestamp probes only), and probe loss as shown in Table 1.
RPM Statistics |
Description |
|---|---|
| Round-Trip Times | |
Minimum round-trip time |
Shortest round-trip time from the Juniper Networks device to the remote server, as measured over the course of the test |
Maximum round-trip time |
Longest round-trip time from the Juniper Networks device to the remote server, as measured over the course of the test |
Average round-trip time |
Average round-trip time from the Juniper Networks device to the remote server, as measured over the course of the test |
Standard deviation round-trip time |
Standard deviation of the round-trip times from the Juniper Networks device to the remote server, as measured over the course of the test |
Jitter |
Difference between the maximum and minimum round-trip times, as measured over the course of the test |
| Inbound and Outbound Times (ICMP Timestamp Probes Only) | |
Minimum egress time |
Shortest one-way time from the Juniper Networks device to the remote server, as measured over the course of the test |
Maximum ingress time |
Shortest one-way time from the remote server to the Juniper Networks device, as measured over the course of the test |
Average egress time |
Average one-way time from the Juniper Networks device to the remote server, as measured over the course of the test |
Average ingress time |
Average one-way time from the remote server to the Juniper Networks device, as measured over the course of the test |
Standard deviation egress time |
Standard deviation of the one-way times from the Juniper Networks device to the remote server, as measured over the course of the test |
Standard deviation ingress time |
Standard deviation of the one-way times from the remote server to the Juniper Networks device, as measured over the course of the test |
Egress jitter |
Difference between the maximum and minimum outbound times, as measured over the course of the test |
Ingress jitter |
Difference between the maximum and minimum inbound times, as measured over the course of the test |
| Probe Counts | |
Probes sent |
Total number of probes sent over the course of the test |
Probe responses received |
Total number of probe responses received over the course of the test |
Loss percentage |
Percentage of probes sent for which a response was not received |
RPM Thresholds and Traps
You can configure RPM threshold values for the round-trip times, ingress (inbound) times, and egress (outbound) times that are measured for each probe, as well as for the standard deviation and jitter values that are measured for each test. Additionally, you can configure threshold values for the number of successive lost probes within a test and the total number of lost probes within a test.
If the result of a probe or test exceeds any threshold, the device generates a system log message and sends any Simple Network Management Protocol (SNMP) notifications (traps) that you have configured.
Starting in Junos OS Release 18.4R1, if the result of a probe or test exceeds the packet loss threshold, the real-time performance monitoring (RPM) test probe is marked as failed. The test probe also fails when the round-trip time (RTT) exceeds the configured threshold value. As a result, the device generates an SNMP notification (trap) and marks the RPM test as failed. RPM allows you to perform service-level monitoring. When RPM is configured on a device, the device calculates network performance based on packet response time, jitter, and packet loss.
RPM for BGP Monitoring
When managing peering networks that are connected using Border Gateway Protocol (BGP), you might need to find out if a path exists between the Juniper Networks device and its configured BGP neighbors. You can ping each BGP neighbor manually to determine the connection status, but this method is not practical when the device has a large number of BGP neighbors configured.
In the device, you can configure RPM probes to monitor the BGP neighbors and determine if they are active.
Understanding Real-Time Performance Monitoring on Switches
Real-time performance monitoring (RPM) enables you to configure active probes to track and monitor traffic across the network and to investigate network problems. You can use RPM with Juniper Networks EX Series and QFX Series switches.
The ways in which you can use RPM include:
Monitor time delays between devices.
Monitor time delays at the protocol level.
Set thresholds to trigger SNMP traps when values are exceeded.
You can configure thresholds for round-trip time, ingress or egress delay, standard deviation, jitter, successive lost probes, and total lost probes per test. (SNMP trap results are stored in
pingResultsTable,jnxPingResultsTable,jnxPingProbeHistoryTable, andpingProbeHistoryTable.)Determine automatically whether a path exists between a host router or switch and its configured BGP neighbors. You can view the results of the discovery using an SNMP client.
Use the history of the most recent 50 probes to analyze trends in your network and predict future needs.
RPM provides MIB support with extensions for RFC 2925, Definitions of Managed Objects for Remote Ping, Traceroute, and Lookup Operations.
This topic includes:
- RPM Packet Collection
- Tests and Probe Types
- Hardware Timestamps
- Limitations of RPM on EX Series and QFX Series Switches
RPM Packet Collection
Probes collect packets per destination and per application, including ping Internet Control Message Protocol (ICMP) packets, User Datagram Protocol and Transmission Control Protocol (UDP/TCP) packets with user-configured ports, user-configured Differentiated Services code point (DSCP) type-of-service (ToS) packets, and Hypertext Transfer Protocol (HTTP) packets.
Tests and Probe Types
A test can contain multiple probes. The probe type specifies the packet and protocol contents of the probe.
EX Series and QFX Series switches support the following tests and probe types:
QFX Series switches do not support hardware-timestamp probes.
Ping tests:
ICMP echo probe
ICMP timestamp probe
HTTP tests:
HTTP get probe (not available for BGP RPM services)
HTTP get metadata probe
UDP and TCP tests with user-configured ports:
UDP echo probe
TCP connection probe
UDP timestamp probe
Hardware Timestamps
To account for latency or jitter in the communication of probe messages, you can enable timestamping of the probe packets (hardware timestamps). If hardware timestamps are not configured, timers are generated at the software level that are less accurate than they would have been with hardware timestamps.
QFX Series switches do not support hardware timestamps.
On the EX4300 switch, RPM timestamping is performed in the software. The RPM probes at the requester and responder devices are timestamped in the Packet Forwarding Engine instead of the Junos OS process (rmpod) that runs on the Routing Engine. This timestamping method is referred to as pseudo-hardware timestamping.
EX Series switches support hardware timestamps for UDP and ICMP probes. EX Series switches do not support hardware timestamps for HTTP or TCP probes.
You can timestamp the following RPM probes to improve the measurement of latency or jitter.
ICMP ping
ICMP ping timestamp
UDP ping
UDP ping timestamp
icmp-ping is the default probe type on devices running Junos OS.
The probe packets are time stamped with the times at which they are sent and received at both the source and destination endpoints.
You should configure the requester (the RPM client) with hardware timestamps (see Figure 1) to get more meaningful results than you would get without the timestamps. The responder (the RPM server) does not need to be configured to support hardware timestamps. If the responder supports hardware timestamps, it timestamps the RPM probes. If the responder does not support hardware timestamps, RPM can only report round-trip measurements that include the processing time on the responder.
On the EX4300 switch, you must configure the switch as both the requester (the RPM client) and the responder (the RPM server) to timestamp the RPM packet.
Figure 1 shows the timestamps:
T1 is the time the packet leaves the requester port.
T2 is the time the responder receives the packet.
T3 is the time the responder sends the response.
T4 is the time the requester receives the response.
The round-trip time is (T2 – T1) + (T4 – T3). If the responder does not support hardware timestamps, then the round-trip time is (T4 – T1) / 2, and thus includes the processing time of the responder.
You can use RPM probes to find the following time measurements:
Minimum round-trip time
Maximum round-trip time
Average round-trip time
Standard deviation of the round-trip time
Jitter of the round-trip time—Difference between the minimum and maximum round-trip time
The RPM feature provides a configuration option to set one-way hardware timestamps. Use one-way timestamps when you want information about one-way time, rather than round-trip times, for packets to traverse the network between the requester and the responder. As shown in Figure 1, one-way timestamps represent the time T2 – T1 and the time from T4 – T3. Use one-way timestamps when you want to gather information about delay in each direction and to find egress and ingress jitter values.
For correct one-way measurement, the clocks of the requester and responder must be synchronized. If the clocks are not synchronized, one-way jitter measurements and calculations can include significant variations, in some cases orders of magnitude greater than the round-trip times.
When you enable one-way timestamps in a probe, the following one-way measurements are reported:
Minimum, maximum, standard deviation, and jitter measurements for egress and ingress times
Number of probes sent
Number of probe responses received
Percentage of lost probes
Limitations of RPM on EX Series and QFX Series Switches
Two-Way Active Measurement Protocol (TWAMP) is not supported on the switches.
The switches do not support user-configured class-of-service (CoS) classifiers or prioritization of RPM packets over regular data packets received on an input interface.
Timestamps:
If the responder does not support hardware timestamps, RPM can only report the round-trip measurements and cannot calculate round-trip jitter.
Note:QFX Series switches do not support hardware timestamps.
EX Series switches do not support hardware timestamps or pseudo-hardware timestamps for HTTP and TCP probes.
Timestamps apply only to IPv4 traffic.
In-Service Software Upgrades (ISSU) and Nonstop Software Upgrades (NSSU) do not support pseudo-hardware timestamps.
RPM Support for VPN Routing and Forwarding
Real-time performance monitoring (RPM) is supported on all Juniper Network devices.
VRF in a Layer 3 VPN implementation allows multiple instances of a routing table to coexist within the same device at the same time. Because the routing instances are independent, the same or overlapping IPv4 or IPv6 addresses can be used without conflicting each other.
RPM ICMP and UDP probe with VPN routing and forwarding (VRF) has been improved. In previous releases, the RPM probes specified to a VRF table were not handled by the real-time forwarding process (FWDD-RT). In Junos OS Release 10.0, RPM probes specified to a VRF table are handled by the FWDD-RT, thereby providing more accurate results.
This feature supports RPM ICMP and UDP probes configured with routing instances of type VRF.
RPM Configuration Options
You can configure real-time performance monitoring (RPM) parameters. See Table 2 for a summary of the configuration options.
Field |
Function |
Your Action |
|---|---|---|
| Performance Probe Owners | ||
Owner Name (required) |
Identifies an RPM owner for which one or more RPM tests are configured. In most implementations, the owner name identifies a network on which a set of tests is being run (a particular customer, for example). |
Type the name of the RPM owner. |
| Identification | ||
Test name (required) |
Uniquely identifies the RPM test |
Type the name of the RPM test. |
Target (Address or URL) (required) |
IPv4 or IPv6 address or URL of probe target |
Type the IPv4 address, in dotted decimal notation, IPv6 address, or the URL of the probe target. If the target is a URL, type a fully formed URL that includes http://. |
Source Address |
Explicitly configured IPv4 or IPv6 address to be used as the probe source address |
Type the source address to be used for the probe. If the source address is not one of the device's assigned addresses, the packet uses the outgoing interface's address as its source. |
Routing Instance |
Particular routing instance over which the probe is sent |
Type the routing instance name. The routing instance applies only to probes of type icmp , icmp6-ping, and icmp-timestamp. The default routing instance is inet.0. |
History Size |
Number of probe results saved in the probe history |
Type a number between 0 and 255. The default history size is 50 probes. |
| Request Information | ||
Probe Type (required) |
Specifies the type of probe to send as part of the test. |
Select the desired probe type from the list:
|
Interval |
Sets the wait time (in seconds) between each probe transmission |
Type a number between 1 and 255 (seconds). |
Test Interval (required) |
Sets the wait time (in seconds) between tests. |
Type a number between 0 and 86400 (seconds). |
Probe Count |
Sets the total number of probes to be sent for each test. |
Type a number between 1 and 15. |
Destination Port |
Specifies the TCP or UDP port to which probes are sent. To use TCP or UDP probes, you must configure the remote server as a probe receiver. Both the probe server and the remote server must be Juniper Networks devices configured to receive and transmit RPM probes on the same TCP or UDP port. |
Type the number 7—a standard TCP or UDP port number—or a port number from 49152 through 65535. |
DSCP Bits |
Specifies the Differentiated Services code point (DSCP) bits. This value must be a valid 6–bit pattern. The default is 000000. |
Type a valid 6–bit pattern. |
Data Size |
Specifies the size of the data portion of the ICMP probes. |
Type a size (in bytes) between 0 and 65507. |
Data Fill |
Specifies the contents of the data portion of the ICMP probes. |
Type a hexadecimal value between 1 and 800h to use as the contents of the ICMP probe data. |
Hardware Timestamp |
Enables timestamping of RPM probe messages. You can timestamp the following RPM probes to improve the measurement of latency or jitter:
|
To enable timestamping, select the check box. |
| Maximum Probe Thresholds | ||
Successive Lost Probes |
Sets the total number of probes that must be lost successively to trigger a probe failure and generate a system log message. |
Type a number between 0 and 15. |
Lost Probes |
Sets the total number of probes that must be lost to trigger a probe failure and generate a system log message. |
Type a number between 0 and 15. |
Round Trip Time |
Sets the total round-trip time (in microseconds), from the device to the remote server, that triggers a probe failure and generates a system log message. |
Type a number between 0 and 60,000,000 (microseconds). |
Jitter |
Sets the total jitter (in microseconds), for a test, that triggers a probe failure and generates a system log message. |
Type a number between 0 and 60,000,000 (microseconds). |
Standard Deviation |
Sets the maximum allowable standard deviation (in microseconds) for a test, which, if exceeded, triggers a probe failure and generates a system log message. |
Type a number between 0 and 60,000,000 (microseconds). |
Egress Time |
Sets the total one-way time (in microseconds), from the device to the remote server, that triggers a probe failure and generates a system log message. |
Type a number between 0 and 60,000,000 (microseconds). |
Ingress Time |
Sets the total one-way time (in microseconds), from the remote server to the device, that triggers a probe failure and generates a system log message. |
Type a number between 0 and 60,000,000 (microseconds) |
Jitter Egress Time |
Sets the total outbound-time jitter (in microseconds), for a test, that triggers a probe failure and generates a system log message. |
Type a number between 0 and 60,000,000 (microseconds) |
Jitter Ingress Time |
Sets the total inbound-time jitter (in microseconds), for a test, that triggers a probe failure and generates a system log message. |
Type a number between 0 and 60,000,000 (microseconds). |
Egress Standard Deviation |
Sets the maximum allowable standard deviation of outbound times (in microseconds) for a test, which, if exceeded, triggers a probe failure and generates a system log message. |
Type a number between 0 and 60,000,000 (microseconds). |
Ingress Standard Deviation |
Sets the maximum allowable standard deviation of inbound times (in microseconds) for a test, which, if exceeded, triggers a probe failure and generates a system log message. |
Type a number between 0 and 60,000,000 (microseconds). |
| Traps | ||
Egress Jitter Exceeded |
Generates SNMP traps when the threshold for jitter in outbound time is exceeded. |
|
Egress Standard Deviation Exceeded |
Generates SNMP traps when the threshold for standard deviation in outbound times is exceeded. |
|
Egress Time Exceeded |
Generates SNMP traps when the threshold for maximum outbound time is exceeded. |
|
Ingress Jitter Exceeded |
Generates SNMP traps when the threshold for jitter in inbound time is exceeded. |
|
Ingress Standard Deviation Exceeded |
Generates SNMP traps when the threshold for standard deviation in inbound times is exceeded. |
|
Ingress Time Exceeded |
Generates traps when the threshold for maximum inbound time is exceeded. |
|
Jitter Exceeded |
Generates traps when the threshold for jitter in round-trip time is exceeded. |
|
Probe Failure |
Generates traps when the threshold for the number of successive lost probes is reached. |
|
RTT Exceeded |
Generates traps when the threshold for maximum round-trip time is exceeded. |
|
Standard Deviation Exceeded |
Generates traps when the threshold for standard deviation in round-trip times is exceeded. |
|
Test Completion |
Generates traps when a test is completed. |
|
Test Failure |
Generates traps when the threshold for the total number of lost probes is reached. |
|
| Performance Probe Server | ||
TCP Probe Server |
Specifies the port on which the device is to receive and transmit TCP probes. |
Type the number 7—a standard TCP or UDP port number—or a port number from 49160 through 65535. |
UDP Probe Server |
Specifies the port on which the device is to receive and transmit UDP probes. |
Type the number 7—a standard TCP or UDP port number—or a port number from 49160 through 65535. |
On SRX300, SRX320, SRX340, SRX1500 devices and vSRX instances, when you configure basic RPM probes, the following combination of the configuration parameters is not supported:
Source address and destination port and next-hop.
Configuring RPM probe with these parameters prevents sending out RPM probes to a specified probe target. We recommend you to configure either the source address or destination port and next-hop to configure RPM probe.
Two-Way Active Measurement Protocol (TWAMP) Overview
SUMMARY Learn about Two-Way Active Measurement Protocol (TWAMP) to measure network performance between any two devices in a network.
- Benefits of TWAMP
- Understand Two-Way Active Measurement Protocol (TWAMP)
- Implementation of TWAMP Elements
- Limitations
Benefits of TWAMP
TWAMP configuration helps you activate, test, monitor, and troubleshoot your network end-to-end without using a dedicated testing device.
TWAMP-Test timestamps provide two-way or round-trip metrics with greater accuracy than other methods (processing delays can be factored as well).
TWAMP is often used to check service-level agreement (SLA) compliance, and the TWAMP feature is often used in that context.
Two-way measurements are better than one-way measurements because round-trip delays do not require host clock synchronization. This is possible because the reflector places its own sequence number in the packet.
We recommend that you do not configure the RPM client and a TWAMP server on the same device. This might cause some issues in the RPM probe results.
Understand Two-Way Active Measurement Protocol (TWAMP)
The Two-Way Active Measurement Protocol (TWAMP) is an open protocol for measuring network performance between any two devices in a network that supports the protocols in the TWAMP framework. It is a standard protocol framework that separates sessions based on the client/server architecture. The TWAMP client is a host that initiates the TCP connection and acts as a control-client and a session-sender, while the TWAMP server is a host that acknowledges the TCP connection and performs the roles of a server and a session-reflector. TWAMP-Control messages are exchanged between the control-client and the server and TWAMP-Test messages are exchanged between the session-sender and the session-reflector. Four different TWAMP devices can perform the four logical roles of TWAMP control-client, server, session-sender, and session-reflector.
The four elements are shown Figure 2.
TWAMP consists of two interrelated protocols –TWAMP-Control and TWAMP-Test. TWAMP- Control is used to initiate, start, and stop test sessions, whereas TWAMP-Test is used to exchange test packets between two TWAMP entities.
TWAMP-Control —A TWAMP control connection is responsible for managing (initiating, starting, and ending) the test sessions between a TWAMP client and a TWAMP server for performance measurement.
The remote operation process or daemon (rmopd) in the Junos OS Routing Engine takes care of the control plane operations that include handling both the client and server control message exchanges. The packet path processing for the control connection is the same as for any other control process. After the server-greeting, setup-response, and setup-start messages are successfully exchanged, the TWAMP client starts processing the session creation messages. One or more test sessions are created with the following tuples, that contain:
Destination IP (DIP) addresses of the client and server
Source IP (SIP) addresses of the client and server
UDP ports on the client and server
TWAMP-Test —A TWAMP test session exchanges probe packets to measure the performance metrics. Each test session between a client and server can use different QoS values –for example, round trip time (RTT), delay, and latency variations –to test QoS behavior on the network path for different packet priorities.
The timestamps on the test probes on the sender side are just before the packet is sent out on the link. Similarly, timestamps on the test probes on the receiver (server) side are recorded as soon as the probe packets are received from the link. This prompt recording of timestamps helps to calculate fairly accurate RTT, delay, and jitter characteristics of the probes. The test probes can also be set to different QoS values to test the QoS behavior on the network path.
Implementation of TWAMP Elements
A common implementation of TWAMP elements combines the roles of control-client and session-sender in one device (known as the TWAMP controller or TWAMP client) and the roles of server and session-reflector in the other device (known as the TWAMP responder or TWAMP server). In this case, each device runs both the TWAMP-Control (between control-client and server) and TWAMP-Test (between session-sender and session-reflector) protocols.
Figure 3 illustrates the TWAMP elements, which are implemented as client and server.
Limitations
SRX300, SRX320, SRX340, SRX345, SRX550M, SRX1500, SRX4100, and SRX4200 devices and vSRX instances have the following limitations for TWAMP support:
TWAMP for IPv6 is not supported.
TWAMP server and TWAMP client authentication are not supported.
Example: Configuring TWAMP Client and Server
This example shows how to configure the Two-Way Active Measurement Protocol (TWAMP) client and TWAMP server.
Requirements
This example uses the following hardware and software components:
SRX Series device.
Junos OS Release 18.1R1 and later releases.
Before you begin configuring TWAMP client and TWAMP server, ensure that you have read Two-Way Active Measurement Protocol (TWAMP) Overview to understand how this task fits into the overall configuration process.
Overview
The TWAMP is an open protocol for measuring network performance between any two devices in a network that supports the TWAMP protocol. The TWAMP consists of TWAMP-Control protocol and TWAMP-Test protocol. The TWAMP-Control protocol is used to initiate, start and stop the test sessions between the control client. The TWAMP-Test protocol used to exchange the test packets between the session sender and the session reflector.
Figure 4 shows the TWAMP architecture composed of the following entities that are responsible for starting a monitoring session and exchanging packets:
The control client initiates all requested test sessions with a start sessions message, and the TWAMP server acknowledges. When necessary, the control client sends a message to stop all test sessions.
The session sender and the session reflector exchange test packets according to the TWAMP-Test protocol for each active session. On receiving a TWAMP-Test packet, the session reflector reflects a measurement packet and does not collect any packet statistics in TWAMP.
The TWAMP server is an end system that manages one or more TWAMP sessions and capable of configuring per-session ports. The TWAMP server listens to the TCP port. The session reflector and TWAMP server make up the TWAMP responder in an IP service-level agreement operation.
For Junos OS Release 18.1R1, both the control client and session sender resides on the same device. The client design does not mandate the TWAMP server and the session reflector to be on the same system. Hence, the Juniper TWAMP client is also capable of working with a third-party server implementation.
Configuration for TWAMP Client
Procedure
CLI Quick Configuration
To quickly configure this example, copy the following commands, paste them into a text file, remove any line breaks, change any details necessary to match your network configuration, copy and paste the commands into the CLI, at the [edit] hierarchy level, and then enter commit from configuration mode.
set services rpm twamp client control-connection c1 target-address 10.20.30.1/24 set services rpm twamp client control-connection c1 test-session t1 target-address 10.20.30.2/24 set services rpm twamp client control-connection c1 test-session t1 probe-count 2000 set interfaces ge-0/0/6 unit 0 family inet address 10.20.30.3/24 set security zones security-zone trust host-inbound-traffic system-services all set security zones security-zone trust host-inbound-traffic protocols all set security zones security-zone trust interfaces ge-0/0/6.0
Step-by-Step Procedure
The following example requires you to navigate various levels in the configuration hierarchy.
To configure the TWAMP Client:
Configure the target address.
user@host# set services rpm twamp client control-connection c1 target-address 10.20.30.1/24
Specify the name of the test-session and the target address.
user@host# set services rpm twamp client control-connection c1 test-session t1 target-address 10.20.30.2/24
Specify the number of probes within a test.
user@host# set services rpm twamp client control-connection c1 test-session t1 probe-count 2000
Set the family inet address.
user@host# set interfaces ge-0/0/6 unit 0 family inet address 10.20.30.3/24
Configure zones.
user@host# set security zones security-zone trust host-inbound-traffic system-services all user@host# set security zones security-zone trust host-inbound-traffic protocols all user@host# set security zones security-zone trust interfaces ge-0/0/6.0
Results
From the configuration mode of Router 1, confirm your
configuration by entering the show services rpm twamp, show interfaces, and show security commands. If
the output does not display the intended configuration, repeat the
instructions in this example to correct the configuration.
user@host# show services rpm twamp
client {
control-connection c1 {
target-address 10.20.30.1/24;
test-session t1 {
target-address 10.20.30.2/24;
probe-count 2000;
}
}
}
user@host# show security
zones {
security-zone trust {
host-inbound-traffic {
system-services {
all;
}
protocols {
all;
}
}
interfaces {
ge-0/0/6.0;
}
}
}
user@host# show interfaces
ge-0/0/6 {
unit 0 {
family inet {
address 10.20.30.3/24;
}
}
}
Configuration for TWAMP Server
Procedure
CLI Quick Configuration
To quickly configure this example, copy the following commands, paste them into a text file, remove any line breaks, change any details necessary to match your network configuration, copy and paste the commands into the CLI, at the [edit] hierarchy level, and then enter commit from configuration mode.
set services rpm twamp server authentication-mode none set services rpm twamp server client-list client1 address 10.20.30.4/24 set interfaces ge-0/0/5 unit 0 family inet address 10.20.30.5/24 set security zones security-zone trust host-inbound-traffic system-services all set security zones security-zone trust host-inbound-traffic protocols all set security zones security-zone trust interfaces ge-0/0/5.0
Step-by-Step Procedure
The following example requires you to navigate various levels in the configuration hierarchy.
To configure the TWAMP Server:
Configure the services and set the authentication mode for the TWAMP server.
user@host#set services rpm twamp server authentication-mode none
Specify the client-list name and the address.
user@host# set services rpm twamp server client-list client1 address 10.20.30.4/24
Configure the interface and the address.
user@host# set interfaces ge-0/0/5 unit 0 family inet address 10.20.30.5/24
Configure zones.
user@host# set security zones security-zone trust host-inbound-traffic system-services all user@host# set security zones security-zone trust host-inbound-traffic protocols all user@host# set security zones security-zone trust interfaces ge-0/0/5.0
Results
From the configuration mode of Router 1, confirm your
configuration by entering the show services rpm twamp, show interfaces, and show security commands. If
the output does not display the intended configuration, repeat the
instructions in this example to correct the configuration.
user@host# show services rpm twamp
server {
authentication-mode none;
client-list client1 {
address {
10.20.30.4/24;
}
}
}
user@host# show security
zones {
security-zone trust {
host-inbound-traffic {
system-services {
all;
}
protocols {
all;
}
}
interfaces {
ge-0/0/5.0;
}
}
}
user@host# show interfaces
ge-0/0/5 {
unit 0 {
family inet {
address 10.20.30.5/24;
}
}
}
Verification
Confirm that the configuration is working properly.
Verifying TWAMP Client Sessions
Purpose
Verify that the TWAMP client sessions are established.
Action
From operational mode, enter the show services
rpm twamp client session command.
user@host>show services rpm twamp client session Connection Session Sender Sender Reflector Reflector Name Name address port address port c1 t1 10.20.30.1/24 10001 10.20.30.02/24 10001
Verifying TWAMP Server Sessions
Purpose
Verify that the TWAMP server sessions are established.
Action
From operational mode, enter the show services
rpm twamp server session command.
user@host>show services rpm twamp server session Session Connection Sender Sender Reflector Reflector ID ID address port address port 3 6 10.20.30.4/24 40000 10.20.30.5/24 40000
Guidelines for Configuring RPM Probes for IPv6
Starting with Junos OS Release 15.1X49-D10, you can configure RPM Probes for IPv6.
Keep the following guidelines in mind when you configure IPv6 addresses for RPM destinations or servers:
IPv6 RPM uses ICMPv6 probe requests. You cannot configure ICMP or ICMP timestamp probe types.
Only Routing Engine-based RPM is supported for IPv6 targets including VRF support, specification of the size of the data portion of ICMPv6 probes, data pattern, and traffic class.
You can configure probes with a combination of IPv4 and IPv6 tests. However, an individual test must be either IPv4 or IPv6.
Routing Engine-based RPM does not support hardware-based, or one-way hardware-based timestamping.
We recommend that you include the
probe-limitstatement at the[edit services rpm]hierarchy level to set the limit on concurrent probes to 10. Higher concurrent probes can result in higher spikes.SNMP set operation is permitted only on ICMP probes and it is not supported for other probe types.
The following table describes the IPv6 special address prefixes that you cannot configure in a probe.
IPV6 Address Type
IPV6 Address Prefix
Node-Scoped Unicast
::1/128 is the loopback address
::/128 is the unspecified address
IPv4-Mapped Addresses
::FFFF:0:0/96
IPv4-Compatible Addresses
:<ipv4-address>/96
Link-Scoped Unicast
fe80::/10
Unique-Local
fc00::/7
Documentation Prefix
2001:db8::/32
6to4
2002::/16
6bone
5f00::/8
ORCHID
2001:10::/28
Teredo
2001::/32
Default Route
::/0
Multicast
ff00::/8
In Routing Engine-based RPM, route-trip time (RTT) spikes might occur because of queuing delays, even with a single test.
Since RPM might open TCP and UDP ports to communicate between the RPM server and RPM client, we recommend that you use firewalls and distributed denial-of-service (DDoS) attack filters to protect against security threats.
Configuring the Interface for RPM Timestamping for Client/Server on a Switch (CLI Procedure)
Use real-time performance monitoring (RPM) to configure active probes to track and monitor traffic across the network and to investigate network problems. To configure basic RPM probes on the EX Series or QFX Series switch, you must configure the probe owner, the test, and the specific parameters of the RPM probe.
You can also set a timestamp to improve the measurement of latency or jitter. The probe is timestamped by the device originating the probe (the RPM client). If you do not enable hardware timestamps, the timer values are set. You should configure both the RPM client (the requester) and the RPM server (the responder) to timestamp the RPM packets. However, if the RPM server does not support hardware timestamps, RPM can only report the round-trip measurements.
On the EX4300 switch, RPM timestamping is performed in the software. The RPM probes at the requester and responder devices are timestamped in the Packet Forwarding Engine instead of the Junos OS process (rmpod) that runs on the Routing Engine. This timestamping method is referred to as pseudo-hardware timestamping.
QFX Series switches do not support hardware timestamps.
Timestamps apply only to IPv4 traffic.
You can enable hardware timestamps for the following RPM probe types:
icmp-pingicmp-ping-timestampudp-pingudp-ping-timestamp
To configure RPM probes and to enable hardware timestamping:
Directing RPM Probes to Select BGP Devices
If a device has a large number of BGP neighbors configured, you can direct (filter) the RPM probes to a selected group of BGP neighbors rather than to all the neighbors. To identify the BGP devices to receive RPM probes, you can configure routing instances.
The following example requires you to navigate various levels in the configuration hierarchy. For instructions on how to do that, see Using the CLI Editor in Configuration Mode in the Junos OS CLI User Guide .
To direct RPM probes to select BGP neighbors:
IPv6 RPM Probes
Starting with Junos OS Release 15.1X49-D10, Route Engine-based RPM can send and receive IPv6 probe packets to monitor performance on IPv6 networks.
A probe request is a standard IPv6 packet with corresponding TCP, UDP, and ICMPv6 headers. A probe response is also a standard IPv6 packet with corresponding TCP, UDP, and ICMPv6 headers. No RPM header is appended to the standard packet for RE-based RPM. An IPv6-based RPM test occurs between an IPv6 RPM client and IPv6 RPM server.
You can have both IPv4 tests and IPv6 tests in the same probe.
Configuring IPv6 RPM Probes
Starting with Junos OS Release 15.1X49-D10, you can configure IPv6 destination addresses for an IPv6-based RPM probe test.
To configure an IPv6 RPM test:
Tuning RPM Probes
After configuring an RPM probe, you can set parameters to control probe functions, such as the interval between probes, the total number of concurrent probes that a system can handle, and the source address used for each probe packet. See Example: Configuring Basic RPM Probes.
The following example requires you to navigate various levels in the configuration hierarchy. For instructions on how to do that, see Using the CLI Editor in Configuration Mode in the Junos OS CLI User Guide .
To tune RPM probes:
Monitoring RPM Probes
The RPM information includes the round-trip time, jitter, and
standard deviation values for each configured RPM test on the device.
To view these RPM properties, select Troubleshoot>RPM>View RPM in the J-Web user interface, or in configuration mode enter the show command:
[edit] user@host# run show services rpm probe-results
In addition to the RPM statistics for each RPM test, the J-Web user interface displays the round-trip times and cumulative jitter graphically. Figure 5 shows sample graphs for an RPM test.
In Figure 5, the round-trip time and jitter values are plotted as a function of the system time. Large spikes in round-trip time or jitter indicate a slower outbound (egress) or inbound (ingress) time for the probe sent at that particular time.
Table 3 summarizes key output fields in RPM displays.
Field |
Values |
Additional Information |
|---|---|---|
| Currently Running Tests | ||
Graph |
Click the Graph link to display the graph (if it is not already displayed) or to update the graph for a particular test. |
|
Owner |
Configured owner name of the RPM test. |
– |
Test Name |
Configured name of the RPM test. |
– |
Probe Type |
Type of RPM probe configured for the specified test:
|
– |
Target Address |
IPv4 address, IPv6 address, or URL of the remote server that is being probed by the RPM test. |
– |
Source Address |
Explicitly configured IPv4 or IPv6 source address that is included in the probe packet headers. |
If no source address is configured, the RPM probe packets use the outgoing interface as the source address, and the Source Address field is empty. |
Minimum RTT |
Shortest round-trip time from the Juniper Networks device to the remote server, as measured over the course of the test. |
– |
Maximum RTT |
Longest round-trip time from the Juniper Networks device to the remote server, as measured over the course of the test. |
– |
Average RTT |
Average round-trip time from the Juniper Networks device to the remote server, as measured over the course of the test. |
– |
Standard Deviation RTT |
Standard deviation of round-trip times from the Juniper Networks device to the remote server, as measured over the course of the test. |
– |
Probes Sent |
Total number of probes sent over the course of the test. |
– |
Loss Percentage |
Percentage of probes sent for which a response was not received. |
– |
| Round-Trip Time for a Probe | ||
Samples |
Total number of probes used for the data set. |
The Juniper Networks device maintains records of the most recent 50 probes for each configured test. These 50 probes are used to generate RPM statistics for a particular test. |
Earliest Sample |
System time when the first probe in the sample was received. |
– |
Latest Sample |
System time when the last probe in the sample was received. |
– |
Mean Value |
Average round-trip time for the 50-probe sample. |
– |
Standard Deviation |
Standard deviation of the round-trip times for the 50-probe sample. |
– |
Lowest Value |
Shortest round-trip time from the device to the remote server, as measured over the 50-probe sample. |
– |
Time of Lowest Sample |
System time when the lowest value in the 50-probe sample was received. |
– |
Highest Value |
Longest round-trip time from the Juniper Networks device to the remote server, as measured over the 50-probe sample. |
– |
Time of Highest Sample |
System time when the highest value in the 50-probe sample was received. |
– |
| Cumulative Jitter for a Probe | ||
Samples |
Total number of probes used for the data set. |
The Juniper Networks device maintains records of the most recent 50 probes for each configured test. These 50 probes are used to generate RPM statistics for a particular test. |
Earliest Sample |
System time when the first probe in the sample was received. |
– |
Latest Sample |
System time when the last probe in the sample was received. |
– |
Mean Value |
Average jitter for the 50-probe sample. |
– |
Standard Deviation |
Standard deviation of the jitter values for the 50-probe sample. |
– |
Lowest Value |
Smallest jitter value, as measured over the 50-probe sample. |
– |
Time of Lowest Sample |
System time when the lowest value in the 50-probe sample was received. |
– |
Highest Value |
Highest jitter value, as measured over the 50-probe sample. |
– |
Time of Highest Sample |
System time when the highest jitter value in the 50-probe sample was received. |
– |
Example: Configuring Basic RPM Probes
This example shows how to configure basic RPM probes to measure performance between two network endpoints.
Requirements
Before you begin:
Establish basic connectivity.
Configure network interfaces. See Interfaces User Guide for Security Devices.
Overview
In this example, you configure basic probes for two RPM owners, customerA and customerB. You configure the RPM test as icmp-test for customerA with a test interval of 15 seconds and specify a probe type as icmp-ping-timestamp, a probe timestamp, and a target address as 192.178.16.5. You then configure the RPM thresholds and corresponding SNMP traps to catch ingress (inbound) times greater than 3000 microseconds.
Then you configure the RPM test as http-test for customerB with a test interval of 30 seconds and specify a probe type as http-get and a target URL as http://customerB.net. Finally, you configure RPM thresholds and corresponding SNMP traps as probe-failure and test-failure to catch three or more successive lost probes and total lost probes of 10.
On SRX300, SRX320, SRX340, SRX1500 devices and vSRX instances, when you configure basic RPM probes, the following combination of the configuration parameters is not supported:
Source address and destination port and next-hop.
Configuring RPM probe with these parameters prevents sending out RPM probes to a specified probe target. We recommend you to configure either the source address or destination port and next-hop to configure RPM probe.
Configuration
Procedure
CLI Quick Configuration
To quickly configure this example, copy the
following commands, paste them into a text file, remove any line breaks,
change any details necessary to match your network configuration,
copy and paste the commands into the CLI at the [edit] hierarchy
level, and then enter commit from configuration mode.
set services rpm probe customerA test icmp-test probe-interval 15 set services rpm probe customerA test icmp-test probe-type icmp-ping-timestamp set services rpm probe customerA test icmp-test hardware-timestamp set services rpm probe customerA test icmp-test target address 192.178.16.5 set services rpm probe customerA test icmp-test thresholds ingress-time 3000 set services rpm probe customerA test icmp-test traps ingress-time-exceeded set services rpm probe customerB test http-test probe-interval 30 set services rpm probe customerB test http-test probe-type http-get set services rpm probe customerB test http-test target url http://customerB.net set services rpm probe customerB test http-test thresholds successive-loss 3 set services rpm probe customerB test http-test thresholds total-loss 10 set services rpm probe customerB test http-test traps probe-failure set services rpm probe customerB test http-test traps test-failure
Step-by-Step Procedure
The following example requires you to navigate various levels in the configuration hierarchy. For instructions on how to do that, see Using the CLI Editor in Configuration Mode in the Junos OS CLI User Guide .
To configure basic RPM probes:
Configure the RPM.
[edit] user@host# edit services rpm
Configure the RPM owners.
[edit services rpm] user@host# set probe customerA user@host# set probe customerB
Configure the RPM test for customerA.
[edit services rpm] user@host# edit probe customerA user@host# set test icmp-test probe-interval 15 user@host# set test icmp-test probe-type icmp-ping-timestamp
Specify a probe timestamp and a target address.
[edit services rpm probe customerA] user@host# set test icmp-test hardware-timestamp user@host# set test icmp-test target address 192.178.16.5
Configure RPM thresholds and corresponding SNMP traps.
[edit services rpm probe customerA] user@host# set test icmp-test thresholds ingress-time 3000 user@host# set test icmp-test traps ingress-time-exceeded
Configure the RPM test for customerB.
[edit] user@host# edit services rpm probe customerB user@host# set test http-test probe-interval 30
Specify a probe type and a target URL.
[edit services rpm probe customerB] user@host# set test http-test probe-type http-get user@host# set test http-test target url http://customerB.net
Configure RPM thresholds and corresponding SNMP traps.
[edit services rpm probe customerB] user@host# set test http-test thresholds successive-loss 3 user@host# set test http-test thresholds total-loss 10 user@host# set test http-test traps probe-failure user@host# set test http-test traps test-failure
Results
From configuration mode, confirm your configuration
by entering the show services rpm command. If the output
does not display the intended configuration, repeat the configuration
instructions in this example to correct it.
[edit]
user@host# show services rpm
probe customerA {
test icmp-test {
probe-type icmp-ping-timestamp;
target address 192.178.16.5;
probe-interval 15;
thresholds {
ingress-time 3000;
}
traps ingress-time-exceeded;
hardware-timestamp;
}
}
probe customerB {
test http-test {
probe-type http-get;
target url http://customerB.net;
probe-interval 30;
thresholds {
successive-loss 3;
total-loss 10;
}
traps [ probe-failure test-failure ];
}
}
If you are done configuring the device, enter commit from configuration mode.
Verification
Confirm that the configuration is working properly.
Verifying RPM Services
Purpose
Verify that the RPM configuration is within the expected values.
Action
From operational mode, enter the show services rpm command. The output shows the values that are configured for RPM
on the device.
Verifying RPM Statistics
Purpose
Verify that the RPM probes are functioning and that the RPM statistics are within expected values.
Action
From configuration mode, enter the show services
rpm probe-results command.
user@host> show services rpm probe-results
Owner: customerD, Test: icmp-test
Probe type: icmp-ping-timestamp
Minimum Rtt: 312 usec, Maximum Rtt: 385 usec, Average Rtt: 331 usec,
Jitter Rtt: 73 usec, Stddev Rtt: 27 usec
Minimum egress time: 0 usec, Maximum egress time: 0 usec,
Average egress time: 0 usec, Jitter egress time: 0 usec,
Stddev egress time: 0 usec
Minimum ingress time: 0 usec, Maximum ingress time: 0 usec,
Average ingress time: 0 usec, Jitter ingress time: 0 usec,
Stddev ingress time: 0 usec
Probes sent: 5, Probes received: 5, Loss percentage: 0
Owner: customerE, Test: http-test
Target address: 192.176.17.4, Target URL: http://customerB.net,
Probe type: http-get
Minimum Rtt: 1093 usec, Maximum Rtt: 1372 usec, Average Rtt: 1231 usec,
Jitter Rtt: 279 usec, Stddev Rtt: 114 usec
Probes sent: 3, Probes received: 3, Loss percentage: 0
Owner: Rpm-Bgp-Owner, Test: Rpm-Bgp-Test-1
Target address: 10.209.152.37, Probe type: icmp-ping, Test size: 5 probes
Routing Instance Name: LR1/RI1
Probe results:
Response received, Fri Oct 28 05:20:23 2005
Rtt: 662 usec
Results over current test:
Probes sent: 5, Probes received: 5, Loss percentage: 0
Measurement: Round trip time
Minimum: 529 usec, Maximum: 662 usec, Average: 585 usec,
Jitter: 133 usec, Stddev: 53 usec
Results over all tests:
Probes sent: 5, Probes received: 5, Loss percentage: 0
Measurement: Round trip time
Minimum: 529 usec, Maximum: 662 usec, Average: 585 usec,
Jitter: 133 usec, Stddev: 53 usecConfigure the traps you want using the set services rpm
probe p1 test t1 traps command.
If a trap is triggered, you can view the same in the log file
named messages using the show snmp log messages |
match rmopd command.
|
Possible Option |
Set of values |
|---|---|
|
egress-jitter-exceeded |
Exceeded jitter in egress time threshold |
|
egress-std-dev-exceeded |
Exceeded egress time standard deviation threshold |
|
egress-time-exceeded |
Exceeded maximum egress time threshold |
|
ingress-jitter-exceeded |
Exceeded jitter in ingress time threshold |
|
ingress-std-dev-exceeded |
Exceeded ingress time standard deviation threshold |
|
probe-failure |
Successive probe loss threshold reached |
|
rtt-exceeded |
Exceeded maximum round trip time threshold |
|
std-dev-exceeded |
Exceeded round trip time standard deviation threshold |
|
test-completion |
Test completed |
|
test-failure |
Total probe loss threshold reached |
Example: Configuring RPM Using TCP and UDP Probes
This example shows how to configure RPM using TCP and UDP probes.
Requirements
Before you begin:
Establish basic connectivity.
Configure network interfaces. See Interfaces User Guide for Security Devices.
Configure the probe owner, the test, and the specific parameters of the RPM probe. See Example: Configuring Basic RPM Probes.
Overview
In this example, you configure both the host (device A) and the remote device (device B) to act as TCP and UDP servers. You configure a probe for customerC, which uses TCP packets. Device B is configured as an RPM server for both TCP and UDP packets, using an lt services interface as the destination interface, and ports 50000 and 50037, respectively.
Use probe classification with caution, because improper configuration can cause packets to be dropped.
Configuration
Procedure
CLI Quick Configuration
To quickly configure this example, copy the
following commands, paste them into a text file, remove any line breaks,
change any details necessary to match your network configuration,
copy and paste the commands into the CLI at the [edit] hierarchy
level, and then enter commit from configuration mode.
{device A}
set services rpm probe customerC test tcp-test probe-interval 5
set services rpm probe customerC test tcp-test probe-type tcp-ping
set services rpm probe customerC test tcp-test target address 192.162.45.6
set services rpm probe customerC test tcp-test destination-interface lt-0/0/0
set services rpm probe customerC test tcp-test destination-port 50000
{device B}
set services rpm probe-server tcp port 50000
set services rpm probe-server udp port 50037
Step-by-Step Procedure
The following example requires you to navigate various levels in the configuration hierarchy. For instructions on how to do that, see Using the CLI Editor in Configuration Mode in the Junos OS CLI User Guide .
To configure RPM using TCP and UDP probes:
Configure the RPM owner on device A.
{device A} [edit] user@host# edit services rpm user@host# set probe customerCConfigure the RPM test.
{device A} [edit services rpm] user@host# edit services rpm probe customerC user@host# set test tcp-test probe-interval 5Set the probe type.
{device A} [edit services rpm probe customerC] user@host# set test tcp-test probe-type tcp-pingSpecify the target address.
{device A} [edit services rpm probe customerC] user@host# set test tcp-test target address 192.162.45.6Configure the destination interface.
{device A} [edit services rpm probe customerC] user@host# set test tcp-test destination-interface It-0/0/0Configure port 50000 as the TCP port to which the RPM probes are sent.
{device A} [edit services rpm probe customerC] user@host# set test tcp-test destination-port 50000Configure device B to act as a TCP server using port 50000.
{device B} [edit] user@host# edit services rpm user@host# set probe-server tcp port 50000Configure device B to act as a UDP server using port 50037.
{device B} [edit services rpm] user@host# set probe-server udp port 50037
Results
From configuration mode, confirm your configuration
by entering the show services rpm command. If the output
does not display the intended configuration, repeat the configuration
instructions in this example to correct it.
[edit]
user@host# show services rpm
probe customerC {
test tcp-test {
probe-type tcp-ping;
target address 192.162.45.6;
probe-interval 5;
destination-port 50000;
destination-interface lt-0/0/0.0;
}
}
probe-server {
tcp {
port 50000;
}
udp {
port 50037;
}
}
If you are done configuring the device, enter commit from configuration mode.
Verification
Verifying RPM Probe Servers
Purpose
Confirm that the configuration is working properly.
Verify that the device is configured to receive and transmit TCP and UDP RPM probes on the correct ports.
Action
From configuration mode, enter the show services
rpm active-servers command. The output shows a list of the protocols
and corresponding ports for which the device is configured as an RPM
server.
user@host> show services rpm active-servers
Protocol: TCP, Port: 50000
Protocol: UDP, Port: 50037
Example: Configuring RPM Probes for BGP Monitoring
This example shows how to configure RPM probes to monitor BGP neighbors.
Requirements
Before you begin:
Configure the BGP parameters under RPM configuration to send RPM probes to BGP neighbors. See Example: Configuring Basic RPM Probes.
Use TCP or UDP probes by configure both the probe server (Juniper Networks device) and the probe receiver (the remote device) to transmit and receive RPM probes on the same TCP or UDP port. See Example: Configuring RPM Using TCP and UDP Probes.
Overview
In this example, you specify a hexadecimal value that you want to use for the data portion of the RPM probe as ABCD123. ( It ranges from 1 through 2048 characters.) You specify the data size of the RPM probe as 1024 bytes. ( The value ranges from 0 through 65,507.)
Then you configure destination port 50000 as the TCP port to which the RPM probes are sent. You specify the number of probe results to be saved in the probe history as 25. (It ranges from 0 through 255, and the default is 50.) You set the probe count to 5 and probe interval as 1. (The probe count ranges from 1 through 15, and the default is 1; and the probe interval ranges from 1 through 255, and the default is 3.) You then specify tcp-ping as the type of probe to be sent as part of the test.
Finally, you set the test interval as 60. The value ranges from 0 through 86,400 seconds for the interval between tests.
Configuration
Procedure
CLI Quick Configuration
To quickly configure this example, copy the
following commands, paste them into a text file, remove any line breaks,
change any details necessary to match your network configuration,
copy and paste the commands into the CLI at the [edit] hierarchy
level, and then enter commit from configuration mode.
set services rpm bgp data-fill ABCD123 data-size 1024 set services rpm bgp destination-port 50000 history-size 25 set services rpm bgp probe-count 5 probe-interval 1 set services rpm bgp probe-type tcp-ping test-interval 60
Step-by-Step Procedure
The following example requires you to navigate various levels in the configuration hierarchy. For instructions on how to do that, see Using the CLI Editor in Configuration Mode in the Junos OS CLI User Guide .
To configure RPM probes to monitor BGP neighbors:
Configure the RPM and BGP.
[edit] user@host# edit services rpm bgp
Specify a hexadecimal value.
[edit services rpm bgp] user@host# set data-fill ABCD123
Specify the data size of the RPM probe.
[edit services rpm bgp] user@host# set data-size 1024
Configure the destination port.
[edit services rpm bgp] user@host# set destination-port 50000
Specify the number of probes.
[edit services rpm bgp] user@host# set history-size 25
Set the probe count and probe interval.
[edit services rpm bgp] user@host# set probe-count 5 probe-interval 1
Specify the type of probe.
[edit services rpm bgp] user@host# set probe-type tcp-ping
Note:If you do not specify the probe type the default ICMP probes are sent.
Set the test interval.
[edit services rpm bgp] user@host# set test-interval 60
Results
From configuration mode, confirm your configuration
by entering the show services rpm command. If the output
does not display the intended configuration, repeat the configuration
instructions in this example to correct it.
[edit]
user@host# show services rpm
bgp {
probe-type tcp-ping;
probe-count 5;
probe-interval 1;
test-interval 60;
destination-port 50000;
history-size 25;
data-size 1024;
data-fill ABCD123;
}
If you are done configuring the device, enter commit from configuration mode.