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Monitoring the Interface for SRX-series Devices

The Monitor Interface option displays diagnostic information about the SRX-series devices. You can monitor the device by using command-line interface (CLI) operational mode commands.

The J-Web Monitor page appears when you select Monitor in the taskbar. The Monitor page displays the current configuration on your system and the, status of your chassis, interfaces, class of services, events and alarms, T1, E1, 1-port SFP, ADSL2+, and routing and security operations.

Select Monitor > Interfaces in the J-Web interface to view the interface page. Figure 1 shows interface summary on the Interface page. The interface page displays the information such as available interface name, administration state, actual state, input bytes, output bytes of the interfaces, and description of the configured interfaces.

Figure 1: Interface Summary

Interface Summary

Table 13 summarizes key fields of interfaces summary on the Interface page.

Table 13: Summary of Key Fields

Field Value Additional Information

Graph

Tab to generate the graph of the interface.

See the interface graphs on Interface Graph for more details.

Refresh interval (min)

Indicates the duration of time after which you want the data on the page to be refreshed.

Interface Name

Name of interface. (See the interface naming conventions in the JUNOS Software Interfaces and Routing Configuration Guide.)

Click an interface name to see more information about the interface.

Admin State

Displays if the interface is enabled (up) or disabled (down).

Interfaces are enabled by default.

Actual State

Displays if the link state of the interface is up or down.

If the interface is physically operational, even if it is not configured, the actual state is up.

If there is a problem with the physical interface, the actual state is down.

Input Bytes

The number of bytes presented for processing by the device.

 

Output Bytes

The number of bytes actually processed by the device.

 

Description

The configured description for the interface.

 

To view interface-specific properties such as administration state, SNMP index, MTU, speed or traffic statistics in the J-Web interface, select the interface name on the Interface page. Figure 2 displays the details of the interface.

Figure 2: Interface Details

Interface Details

Table 14summarizes key fields in interface fields.

Table 14: Summary of Key Interface Fields

Field Value Additional Information

State

Displays if the link state of the interface is up or down.

The operational state is the physical state of the interface. If the interface is physically operational, even if it is not configured, the actual state is up.

If there is a problem with the physical interface, the operational state is down.

Admin State

Displays if the interface is enabled (up) or disabled (down)

Interfaces are enabled by default.

SNMP Index

Displays the SNMP index number for the physical interface.

MTU

Displays the maximum transmission unit size on the physical interface.

Speed

Displays the speed at which the interface is running.

Device flags

Displays the information about the physical device.

Interface flags

Displays the information about the interface.

Loopback

Displays if Loopback status is enabled or disabled.

If loopback is enabled, the type of loopback: Local or Remote.

Source filtering

Displays if Source filtering status is enabled or disabled.

Traffic statistics

Displays the number and rate of bytes and packets received and transmitted on the physical interface.

  • Input bytes—Number of bytes received on the interface.
  • Output bytes—Number of bytes transmitted on the interface.
  • Input packets—Number of packets received on the interface.
  • Output packets—Number of packets transmitted on the interface.

Queue counters

Displays the CoS queue number and its associated user-configured forwarding class name.

  • Queued packets—Number of queued packets
  • Transmitted packets—Number of transmitted packets.
  • Dropped packets—Number of packets dropped by the ASIC's RED mechanism.

Ethernet MAC statistics

Displays the Receive and Transmit statistics reported by the PIC's MAC subsystem.

 

Filter statistics

Displays the Receive and Transmit statistics reported by the PIC's MAC address filter subsystem.

The filtering is done by the content-addressable memory (CAM) on the PIC. The filter examines a packet's source and destination MAC addresses to determine whether the packet should enter the system or be rejected.


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