Basic MPLS Configuration
MPLS Configuration Overview
When you first install Junos OS on your device, MPLS is disabled by default. You must explicitly configure your device to allow MPLS traffic to pass through. Complete the following steps for all devices in your MPLS network that are running Junos OS.
To enable MPLS:
- Delete all configured security services from the device. If you do not complete this step, you will get a commit failure. See Example: Deleting Security Services.
- Enable MPLS on the device. See Example: Enabling MPLS.
- Commit the configuration.
- Reboot the device.
Configure MPLS features such as traffic engineering, VPNs, and VPLS. See:
When packet forwarding mode is changed to MPLS, all flow-based security features are deactivated, and the device performs packet-based processing only. Flow-based services such as security policies, zones, NAT, ALGs, chassis clustering, screens, firewall authentication, and IPsec VPNs are unavailable on the device. However, MPLS can be enabled in flow-based packet forwarding mode for selected traffic using firewall filters.
MPLS Configuration Guidelines
When configuring MPLS on QFX Series devices or on EX4600, note that the number of IP prefixes supported depends on the specific platform being used. See the scale specifications in the data sheet of your device for additional information.
We recommend the following:
If your ingress provider edge (PE) switch needs to support more than 8000 external IP prefixes, use a larger capacity device as an ingress PE switch.
If you use a switch as a route reflector for BGP labeled routes, use it as a dedicated route reflector (that is, the switch must not participate in managing data traffic).
If you use a switch as a PE switch or as a route reflector for BGP labeled routes, configure routing policies on the PE switch and the route reflector to filter external IP routes from the routing table.
The configuration example for a routing policy named fib_policy (at the [edit policy-options and [edit routing-options hierarchy levels) to filter BGP labeled routes from the inet.0 routing table is given below:
user@switch# show policy-optionspolicy-statement fib_policy {from {protocol bgp;rib inet.0;}then reject;}user@switch# show routing-optionsforwarding-table {export fib_policy;}
Packet fragmentation using the allow-fragmentation statement at the [edit protocols mpls path-mtu] hierarchy level is not supported on QFX Series devices or on the EX4600 switch. Therefore, you must ensure that the maximum transmission unit (MTU) values configured on every MPLS interface is sufficient to handle MPLS packets. The packets whose size exceeds the MTU value of an interface will be dropped.
Configuring MPLS
You must also configure MPLS for a Layer 2 cross-connect to work. The following is a minimal MPLS configuration:
Example: Enabling MPLS
This example shows how to enable MPLS for packet-based processing. It also shows how to enable the MPLS family and MPLS process on all of the transit interfaces in the network.
When MPLS is enabled, all flow-based security features are deactivated and the device performs packet-based processing. Flow-based services such as security policies, zones, NAT, ALGs, chassis clustering, screens, firewall authentication, IP packets, and IPsec VPNs are unavailable on the device.
Before changing from flow mode to packet mode, you must remove all security policies remaining under flow mode. To prevent management connection loss, you must bind the management interface to zones and enable host-inbound traffic to prevent the device from losing connectivity.
For information about configuring zones, see Security Policies User Guide for Security Devices.
Requirements
Before you begin, delete all configured security services. See Example: Deleting Security Services.
Overview
The instructions in this topic describe how to enable MPLS on the device. You must enable MPLS on the device before including a device running Junos OS in an MPLS network.
Configuration
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.
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.
To enable MPLS:
- Enable MPLS for packet-based processing.[edit security forwarding-options]user@host# set family mpls mode packet-based
- Enable the MPLS family on each transit interface that
you want to include in the MPLS network.[edit interfaces]user@host# set interfaces ge-1/0/0 unit 0 family mpls
- Enable the MPLS process on all of the transit interfaces
in the MPLS network.[edit protocols mpls]user@host# set interface ge-1/0/0 unit 0
Results
From configuration mode, confirm your configuration by entering the show security forwarding-options command. If the output does not display the intended configuration, repeat the configuration instructions in this example to correct it.
If you enable MPLS for packet-based processing by using the command set security forward-option family mpls mode packet, the mode will not change immediately and the system will display the following messages:
warning: Reboot may required when try reset flow inet mode
warning: Reboot may required when try reset mpls flow mode please check security flow status for detail.
You need to reboot your device for the configuration to take effect.
If you disable MPLS and switch back to using the security services (flow-based processing), the mode will not change immediately and the system will display warning messages instructing you to restart your device. You must reboot your device for the configuration to take effect. This will also result in management sessions being reset and transit traffic getting interrupted.
If you are done configuring the device, enter commit from configuration mode.
Verification
Confirm that the configuration is working properly.
Verifying MPLS Is Enabled at the Protocols Level
Purpose
Verify that MPLS is enabled at the protocols level.
Action
From operational mode, enter the show protocols command.
Verifying MPLS Is Enabled at the Interfaces Level
Purpose
Verify that MPLS is enabled at the interfaces level.
Action
From operational mode, enter the show interfaces command.
Example: Configuring MPLS on EX8200 and EX4500 Switches
You can configure MPLS on switches to increase transport efficiency in your network. MPLS services can be used to connect various sites to a backbone network and to ensure better performance for low-latency applications such as voice over IP (VoIP) and other business-critical functions.
To implement MPLS on the switches, you must configure two provider edge (PE) switches—an ingress PE switch and an egress PE switch— and at least one provider (transit) switch. You can configure the customer edge (CE) interfaces on the PE switches of the MPLS network as either circuit cross-connect (CCC) or IP (family inet) interfaces.
This example shows how to configure an MPLS tunnel using a simple interface as a CCC:
This example shows how to configure MPLS using a simple interface as a CCC. For information on configuring a tagged VLAN interface as a CCC, see Configuring an MPLS-Based VLAN CCC Using a Layer 2 VPN (CLI Procedure) or Configuring an MPLS-Based VLAN CCC Using a Layer 2 Circuit.
Requirements
This example uses the following hardware and software components:
Junos OS Release 10.1 or later for switches
Three EX Series switches
Before you begin configuring MPLS, ensure that you have configured the routing protocol (OSPF or IS-IS) on the core interface and the loopback interface on all the switches. This example includes the configuration of OSPF on all the switches. For information on configuring IS-IS as the routing protocol, see the Junos OS Routing Protocols Configuration Guide.
Overview and Topology
This example includes an ingress or local PE switch, an egress or remote PE switch, and one provider switch. It includes CCCs that tie the customer edge interface of the local PE switch (PE-1) to the customer edge interface of the remote PE switch (PE-2). It also describes how to configure the core interfaces of the PE switches and the provider switch to support the transmission of the MPLS packets. In this example, the core interfaces that connect the local PE switch and the provider switch are individual interfaces, while the core interfaces that connect the remote PE switch and the provider switch are aggregated Ethernet interfaces.
Core interfaces cannot be tagged VLAN interfaces.
Core interfaces can be aggregated Ethernet interfaces. This example includes a LAG between the provider switch and the remote PE switch because this type of configuration is another option you can implement. For information on configuring LAGs, see Configuring Aggregated Ethernet Links (CLI Procedure).
Figure 1 shows the topology used in this example.
Table 1 shows the MPLS configuration components used for the ingress PE switch in this example.
Table 1: Components of the Ingress PE Switch in the Topology for MPLS with Interface-Based CCC
Property | Settings | Description |
|---|---|---|
Local PE switch hardware | EX Series switch | PE-1 |
Loopback address | lo0 127.1.1.1/32 | Identifies PE-1 for interswitch communications. |
Routing protocol | ospf traffic-engineering | Indicates that this switch is using OSPF as the routing protocol and that traffic engineering is enabled. |
MPLS protocol and definition of label-switched path | mpls label-switched-path lsp_to_pe2_ge1 to 127.1.13 | Indicates that this PE switch is using the MPLS protocol with the specified LSP to reach the other PE switch (specified by the loopback address). The statement must also specify the core interfaces to be used for MPLS traffic. |
RSVP | rsvp | Indicates that this switch is using RSVP. The statement must specify the loopback address and the core interfaces that will be used for the RSVP session. |
Interface family | family inet family mpls family ccc | The logical units of the core interfaces are configured to belong to both family inet and family mpls. The logical unit of the customer edge interface is configured to belong to family ccc. |
Customer edge interface | ge-0/0/1 | Interface that connects this network to devices outside the network. |
Core interfaces | ge-0/0/5.0 and ge-0/0/6.0 with IP addresses 10.1.5.1/24 and 10.1.6.1/24 | Interfaces that connect to other switches within the MPLS network. |
CCC definition | connections interface ge-0/0/1.0 transmit-lsp lsp_to_pe2_ge1 | Associates the circuit cross-connect (CCC), ge-0/0/1, with the LSPs that have been defined on the local and remote PE switches. |
Table 2 shows the MPLS configuration components used for the egress PE switch in this example.
Table 2: Components of the Egress PE Switch in the Topology for MPLS with Interface-Based CCC
Property | Settings | Description |
|---|---|---|
Remote PE switch hardware | EX Series switch | PE-2 |
Loopback address | lo0 127.1.1.3/32 | Identifies PE-2 for interswitch communications. |
Routing protocol | ospf traffic-engineering | Indicates that this switch is using OSPF as the routing protocol and that traffic engineering is enabled. |
MPLS protocol and definition of label-switched path | mpls label-switched-path lsp_to_pe1_ge1 to 127.1.1.1 | Indicates that this PE switch is using the MPLS protocol with the specified label-switched path (LSP) to reach the other PE switch. The statement must also specify the core interfaces to be used for MPLS traffic. |
RSVP | rsvp | Indicates that this switch is using RSVP. The statement must specify the loopback address and the core interfaces that will be used for the RSVP session. |
Interface family | family inet family mpls family ccc | The logical unit of the core interface is configured to belong to both family inet and family mpls. The logical unit of the customer edge interface is configured to belong to family ccc. |
Customer edge interface | ge-0/0/1 | Interface that connects this network to devices outside the network. |
Core interface | ae0 with IP address 10.1.9.2/24 | Aggregated Ethernet interface on PE-2 that connects to aggregated Ethernet interface ae0 of the provider switch and belongs to family mpls. |
CCC definition | connections remote-interface-switch ge-1-to-pe1 interface ge-0/0/1.0 transmit-lsp lsp_to_pe1_ge1; | Associates the CCC, ge-0/0/1, with the LSPs that have been defined on the local and remote PE switches. |
Table 3 shows the MPLS configuration components used for the provider switch in this example.
Table 3: Components of the Provider Switch in the Topology for MPLS with Interface-Based CCC
Property | Settings | Description |
|---|---|---|
Provider switch hardware | EX Series switch | Transit switch within the MPLS network configuration. |
Loopback address | lo0 127.1.1.2/32 | Identifies provider switch for interswitch communications. |
Routing protocol | ospf traffic-engineering | Indicates that this switch is using OSPF as the routing protocol and that traffic engineering is enabled. |
MPLS protocol | mpls | Indicates that this switch is using the MPLS protocol. The statement must specify the core interfaces that will be used for MPLS traffic. |
RSVP | rsvp | Indicates that this switch is using RSVP. The statement must specify the loopback and the core interfaces that will be used for the RSVP session. |
Interface family | family inet family mpls | The logical units for the loopback interface and the core interfaces belong to family inet. The logical units of the core interfaces are also configured to belong to family mpls. |
Core interfaces | ge-0/0/5.0 and ge-0/0/6.0 with IP addresses 10.1.5.1/24 and 10.1.6.1/24 | Interfaces that connect the provider switch (P) to PE-1. Aggregated Ethernet interface on P that connects to aggregated Ethernet interface ae0 of PE-2. |
Configuring the Local PE Switch
CLI Quick Configuration
To quickly configure the local ingress PE switch, copy the following commands and paste them into the switch terminal window of PE-1:
[edit]
set protocols ospf traffic-engineering
set protocols ospf area 0.0.0.0
interface lo0.0
set protocols ospf area 0.0.0.0 interface ge-0/0/5.0
set protocols
ospf area 0.0.0.0 interface ge-0/0/6.0
set protocols mpls label-switched-path
lsp_to_pe2_ge1 to 127.1.1.3
set protocols mpls interface ge-0/0/5.0
set protocols
mpls interface ge-0/0/6.0
set protocols rsvp interface lo0.0
set protocols
rsvp interface ge-0/0/5.0
set protocols rsvp interface ge-0/0/6.0
set interfaces
lo0 unit 0 family inet address 127.1.1.1/32
set interfaces ge-0/0/5 unit
0 family inet address 10.1.5.1/24
set interfaces ge-0/0/6 unit 0
family inet address 10.1.6.1/24
set interfaces ge-0/0/5 unit 0 family
mpls
set interfaces ge-0/0/6 unit 0 family mpls
set interfaces ge-0/0/1 unit
0 family ccc
set protocols connections remote-interface-switch ge-1-to-pe2
interface ge-0/0/1.0
set protocols connections remote-interface-switch
ge-1-to-pe2 transmit-lsp lsp_to_pe2_ge1
set protocols connections
remote-interface-switch ge-1-to-pe2 receive-lsp lsp_to_pe1_ge1
Step-by-Step Procedure
To configure the local ingress PE switch:
- Configure OSPF with traffic engineering enabled:
[edit protocols]
user@switchPE-1# set ospf traffic-engineering - Configure OSPF on the loopback address and the core interfaces:
[edit protocols]
user@switchPE-1# set ospf area 0.0.0.0 interface lo0.0
user@switchPE-1# set ospf area 0.0.0.0 interface ge-0/0/5.0
user@switchPE-1# set ospf area 0.0.0.0 interface ge-0/0/6.0
- Configure MPLS on this PE switch (PE-1) with a label-switched
path (LSP) to the other PE switch (PE-2):
[edit protocols]
user@switchPE-1# set mpls label-switched-path lsp_to_pe2_ge1 to 127.1.1.3
- Configure MPLS on the core interfaces:
[edit protocols]
user@switchPE-1# set mpls interface ge-0/0/5.0
user@switchPE-1# set mpls interface ge-0/0/6.0
- Configure RSVP on the loopback interface and the core
interfaces:
[edit protocols]
user@switchPE-1# set rsvp interface lo0.0
user@switchPE-1# set rsvp interface ge-0/0/5.0
user@switchPE-1# set rsvp interface ge-0/0/6.0
- Configure IP addresses for the loopback interface and
the core interfaces:
[edit]
user@switchPE-1# set interfaces lo0 unit 0 family inet address 127.1.1.1/32
user@switchPE-1# set interfaces ge-0/0/5 unit 0 family inet address 10.1.5.1/24
user@switchPE-1# set interfaces ge-0/0/6 unit 0 family inet address 10.1.6.1/24 - Configure family mpls on the logical unit of
the core interface addresses:
[edit]
user@switchPE-1# set interfaces ge-0/0/5 unit 0 family mpls
user@switchPE-1# set interfaces ge-0/0/6 unit 0 family mpls - Configure the logical unit of the customer edge interface
as a CCC:
[edit interfaces ge-0/0/1 unit 0]
-user@PE-1# set family ccc - Configure the interface-based CCC from PE-1 to PE-2:
Note You can also configure a tagged VLAN interface as a CCC. See Configuring an MPLS-Based VLAN CCC Using a Layer 2 VPN (CLI Procedure) or Configuring an MPLS-Based VLAN CCC Using a Layer 2 Circuit.
[edit protocols]
user@PE-1# set connections remote-interface-switch ge-1-to-pe2 interface ge-0/0/1.0
user@PE-1# set connections remote-interface-switch ge-1-to-pe2 transmit-lsp lsp_to_pe2_ge1
user@PE-1# set connections remote-interface-switch ge-1-to-pe2 receive-lsp lsp_to_pe1_ge1
Results
Display the results of the configuration:
user@switchPE-1> show configuration
Configuring the Remote PE Switch
CLI Quick Configuration
To quickly configure the remote PE switch, copy the following commands and paste them into the switch terminal window of PE-2:
[edit]
set protocols ospf traffic-engineering
set protocols ospf area 0.0.0.0
interface lo0.0
set protocols ospf area 0.0.0.0 interface ae0
set protocols
mpls label-switched-path lsp_to_pe1_ge1 to 127.1.1.1
set protocols
mpls interface ae0
set protocols rsvp interface lo0.0
set protocols
rsvp interface ae0
set interfaces lo0 unit 0 family inet address
127.1.1.3/32
set interfaces ae0 unit 0 family inet address 10.1.9.2/24
set interfaces
ae0 unit 0 family mpls
set interfaces ge-0/0/1 unit 0 family ccc
set protocols
connections remote-interface-switch ge-1-to-pe1 interface ge-0/0/1.0
set protocols
connections remote-interface-switch ge-1-to-pe1 transmit-lsp lsp_to_pe1_ge1
set protocols
connections remote-interface-switch ge-1-to-pe1 receive-lsp lsp_to_pe2_ge1 Step-by-Step Procedure
To configure the remote PE switch (PE-2):
- Configure OSPF with traffic engineering enabled:
[edit protocols]
user@switchPE-2# set ospf traffic-engineering - Configure OSPF on the loopback interface and the core
interface:
[edit protocols]
user@switchPE-2# set ospf area 0.0.0.0 interface lo0.0
user@switchPE-2# set ospf area 0.0.0.0 interface ae0
- Configure MPLS on this switch (PE-2) with a label-switched
path (LSP) to the other PE switch (PE-1):
[edit protocols]
user@switchPE-2# set mpls label-switched-path lsp_to_pe1_ge1 to 127.1.1.1
- Configure MPLS on the core interface:
[edit protocols]
user@switchPE-2# set mpls interface ae0 - Configure RSVP on the loopback interface and the core
interface:
[edit protocols]
ser@switchPE-2# set rsvp interface lo0.0
user@switchPE-2# set rsvp interface ae0 - Configure IP addresses for the loopback interface and
the core interface:
[edit]
user@switchPE-2# set interfaces lo0 unit 0 family inet address 127.1.1.3/32
user@switchPE-2# set interfaces ae0 unit 0 family inet address 10.1.9.2/24 - Configure family mpls on the logical unit of
the core interface:
[edit]
user@switchPE-2# set interfaces ae0 unit 0 family mpls
- Configure the logical unit of the customer edge interface
as a CCC:
[edit interfaces ge-0/0/1 unit 0]
user@PE-2# set family ccc - Configure the interface-based CCC from PE-2 to PE-1:
[edit protocols]
user@PE-2# set connections remote-interface-switch ge-1-to-pe1 interface ge-0/0/1.0
user@PE-2# set connections remote-interface-switch ge-1-to-pe1 transmit-lsp lsp_to_pe1_ge1
user@PE-2# set connections remote-interface-switch ge-1-to-pe1 receive-lsp lsp_to_pe2_ge1
Results
Display the results of the configuration:
user@switchPE-2> show configuration
Configuring the Provider Switch
CLI Quick Configuration
To quickly configure the provider switch, copy the following commands and paste them into the switch terminal window:
[edit]
set protocols ospf traffic-engineering
set protocols ospf area 0.0.0.0
interface lo0.0
set protocols ospf area 0.0.0.0 interface ge-0/0/5.0
set protocols
ospf area 0.0.0.0 interface ge-0/0/6.0
set protocols ospf area 0.0.0.0
interface ae0
set protocols mpls interface ge-0/0/5.0
set protocols
mpls interface ge-0/0/6.0
set protocols mpls interface ae0
set protocols
rsvp interface lo0.0
set protocols rsvp interface ge-0/0/5.0
set protocols
rsvp interface ge-0/0/6.0
set protocols rsvp interface ae0
set interfaces
lo0 unit 0 family inet address 127.1.1.2/32
set interfaces ge-0/0/5 unit
0 family inet address 10.1.5.1/24
set interfaces ge-0/0/6 unit 0
family inet address 10.1.6.1/24
set interfaces ae0 unit 0 family
inet address 10.1.9.1/24
set interfaces ge-0/0/5 unit 0 family mpls
set interfaces
ge-0/0/6 unit 0 family mpls
set interfaces ae0 unit 0 family mpls
Step-by-Step Procedure
To configure the provider switch:
- Configure OSPF with traffic engineering enabled:
[edit protocols]
user@switchP# set ospf traffic-engineering - Configure OSPF on the loopback interface and the core
interfaces:
[edit protocols]
user@switchP# set ospf area 0.0.0.0 interface lo0.0
user@switchP# set ospf area 0.0.0.0 interface ge-0/0/5
user@switchP# set ospf area 0.0.0.0 interface ge-0/0/6
user@switchP# set ospf area 0.0.0.0 interface ae0 - Configure MPLS on the core interfaces on the switch:
[edit protocols]
user@switchP# set mpls interface ge-0/0/5
user@switchP# set mpls interface ge-0/0/6
user@switchP# set mpls interface ae0 - Configure RSVP on the loopback interface and the core
interfaces:
[edit protocols]
user@switchP# set rsvp interface lo0.0
user@switchP# set rsvp interface ge-0/0/5
user@switchP# set rsvp interface ge-0/0/6
user@switchP# set rsvp interface ae0
- Configure IP addresses for the loopback interface and
the core interfaces:
[edit]
user@switchP# set interfaces lo0 unit 0 family inet address 127.1.1.2/32
user@switchP# set interfaces ge-0/0/5 unit 0 family inet address 10.1.5.1/24
user@switchP# set interfaces ge-0/0/6 unit 0 family inet address 10.1.6.1/24
user@switchP# set interfaces ae0 unit 0 family inet address 10.1.9.1/24 - Configure family mpls on the logical unit of
the core interface addresses:
[edit]
user@switchP# set interfaces ge-0/0/5 unit 0 family mpls
user@switchP# set interfaces ge-0/0/6 unit 0 family mpls
user@switchP# set interfaces ae0 unit 0 family mpls
Results
Display the results of the configuration:
user@switchP> show configuration
Verification
To confirm that the configuration is working properly, perform these tasks:
Verifying the Physical Layer on the Switches
Purpose
Verify that the interfaces are up. Perform this verification task on each of the switches.
Action
user@switchPE-1> show interfaces terse
Interface Admin Link Proto Local Remote
ge-0/0/0 up up
ge-0/0/0.0 up up eth-switch
ge-0/0/1 up up
ge-0/0/1.0 up up ccc
ge-0/0/2 up up
ge-0/0/2.0 up up eth-switch
ge-0/0/3 up up
ge-0/0/3.0 up up eth-switch
ge-0/0/4 up up
ge-0/0/4.0 up up eth-switch
ge-0/0/5 up up
ge-0/0/5.0 up up inet 10.1.5.1/24
mpls
ge-0/0/6 up up
ge-0/0/6.0 up up inet 10.1.6.1/24
mpls
Meaning
The show interfaces terse command displays status information about the Gigabit Ethernet interfaces on the switch. This output verifies that the interfaces are up. The output for the protocol family (Proto column) shows that interface ge-0/0/1.0 is configured as a circuit cross-connect. The output for the protocol family of the core interfaces (ge-0/0/5.0 and ge-0/0/6.0) shows that these interfaces are configured as both inet and mpls. The Local column for the core interfaces shows the IP address configured for these interfaces.
Verifying the Routing Protocol
Purpose
Verify the state of the configured routing protocol. Perform this verification task on each of the switches. The state must be Full.
Action
user@switchPE-1> show ospf neighbor Address Interface State ID Pri Dead 127.1.1.2 ge—0/0/5 Full 10.10.10.10 128 39
Meaning
The show ospf neighbor command displays the status of the routing protocol. This output shows that the state is Full, meaning that the routing protocol is operating correctly—that is, hello packets are being exchanged between directly connected neighbors.
Verifying the Core Interfaces Being Used for MPLS Traffic
Purpose
Verify that the state of the MPLS interface is Up. Perform this verification task on each of the switches.
Action
user@switchPE-1>
show mpls interface
Interface State Administrative groups ge—0/0/5 Up <none>
ge—0/0/6 Up <none>
Meaning
The show mpls interface command displays the status of the core interfaces that have been configured to belong to family mpls. This output shows that the interface configured to belong to family mpls is Up.
Verifying the Status of the RSVP Sessions
Purpose
Verify the status of the RSVP sessions. Perform this verification task on each of the switches.
Action
user@switchPE-1> show rsvp session Ingress RSVP: 1 sessions To From State Rt Style Labelin Labelout LSPname 127.1.13 127.1.1.1 Up 0 1 FF - 300064 lsp_to_pe2_ge1 Total 1 displayed, Up 1, Down 0 Egress RSVP: 1 sessions To From State Rt Style Labelin Labelout LSPname 127.1.1.1 127.1.1.3 Up 0 1 FF 299968 lsp_to_pe1_ge1 Total 1 displayed, Up 1, Down 0 Transit RSVP: 0 sessions Total 0 displayed, Up 0, Down 0
Meaning
This output confirms that the RSVP sessions are Up.
Verifying the Assignment of Interfaces for MPLS Label Operations
Purpose
Verify which interface is being used as the beginning of the CCC and which interface is being used to push the MPLS packet to the next hop. Perform this task only on the PE switches.
Action
user@switchPE-1>
show route forwarding-table family mpls MPLS: Destination Type RtRef Next hop Type Index NhRef Netif default perm 0 dscd 50 1 0 user 0 recv 49 3 1 user 0 recv 49 3 2 user 0 recv 49 3 299776 user 0 Pop 541 2 ge-0/0/1.0 ge-0/0/1.0 (CCC) user 0 2.0.0.1 Push 299792 540 2 ge-0/0/5.0
Meaning
This output shows that the CCC has been set up on interface ge-0/0/1.0. The switch receives ingress traffic on ge-0/0/1.0 and pushes label 299792 onto the packet, which goes out through interface ge-0/0/5.0. The output also shows when the switch receives an MPLS packet with label 29976, it pops the label and sends the packet out through interface ge-0/0/1.0
After you have checked the local PE switch, run the same command on the remote PE switch.
Verifying the Status of the CCC
Purpose
Verify the status of the CCC. Perform this task only on the PE switches.
Action
user@switchPE-1>
show connections
CCC and TCC connections [Link Monitoring On] Legend for status (St) Legend for connection types UN -- uninitialized if-sw: interface switching NP -- not present rmt-if: remote interface switching WE -- wrong encapsulation lsp-sw: LSP switching DS -- disabled tx-p2mp-sw: transmit P2MP switching Dn -- down rx-p2mp-sw: receive P2MP switching -> -- only outbound conn is up <- -- only inbound conn is up Legend for circuit types Up -- operational intf -- interface RmtDn -- remote CCC down tlsp -- transmit LSP Restart -- restarting rlsp -- receive LSP Connection/Circuit Type St Time last up # Up trans ge1-to-pe2 rmt-if Up Feb 17 05:00:09 1 ge-0/0/1.0 intf Up lsp_to_pe1_ge1 tlsp Up lsp_to_pe2_ge1 rlsp Up
Meaning
The show connections command displays the status of the CCC connections. This output verifies that the CCC interface and its associated transmit and receive LSPs are Up. After you have checked the local PE switch, run the same command on the remote PE switch.