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Checking MPLS Connections from the J-Web Interface

Use the J-Web ping MPLS diagnostic tool to diagnose the state of label-switched paths (LSPs), Layer 2 and Layer 3 VPNs, and Layer 2 circuits.

Alternatively, you can use the CLI commands ping mpls, ping mpls l2circuit, ping mpls l2vpn, and ping mpls l3vpn. For more information, see Pinging Hosts from the CLI.

Before using the J-Web ping MPLS tool in your network, read Ping MPLS Preparation.

This section contains the following topics:

Using the J-Web Ping MPLS Tool

Before using the ping MPLS feature, make sure that the receiving interface on the VPN or LSP remote endpoint has MPLS enabled, and that the loopback interface on the outbound node is configured as 127.0.0.1. The source address for MPLS probes must be a valid address on the J Series device.

To use the ping MPLS tool:

  1. Select Troubleshoot>Ping MPLS from the task bar.
  2. Next to the ping MPLS option you want to use, click the expand icon (see Figure 22).
  3. Enter information into the Ping MPLS page, as described in Table 136.
  4. Click Start.

    Table 137 summarizes the output fields of the display.

  5. To stop the ping operation before it is complete, click OK.

Figure 22: Ping MPLS Page

Image s030255.gif

Table 136: J-Web Ping MPLS Field Summary

Field

Function

Your Action

Ping RSVP-signaled LSP

LSP Name

Identifies the LSP to ping.

Type the name of the LSP to ping.

Source Address

Specifies the source address of the ping request packet.

Type the source IP address—a valid address configured on a J Series device interface.

Count

Specifies the number of ping requests to send.

From the list, select the number of ping requests to send. The default is 5 requests.

Detailed Output

Requests the display of extensive rather than brief ping output.

Select the check box to display detailed output.

Ping LDP-signaled LSP

FEC Prefix

Identifies the LSP to ping.

Type the forwarding equivalence class (FEC) prefix and length of the LSP to ping.

Source Address

Specifies the source address of the ping request packet.

Type the source IP address—a valid address configured on a J Series device interface.

Count

Specifies the number of ping requests to send.

From the list, select the number of ping requests to send. The default is 5 requests.

Detailed Output

Requests the display of extensive rather than brief ping output.

Select the check box to display detailed output.

Ping LSP to Layer 3 VPN prefix

Layer 3 VPN Name

Identifies the Layer 3 VPN to ping.

Type the name of the VPN to ping.

Count

Specifies the number of ping requests to send.

From the list, select the number of ping requests to send. The default is 5 requests.

Detailed Output

Requests the display of extensive rather than brief ping output.

Select the check box to display detailed output.

VPN Prefix

Identifies the IP address prefix and length of the Layer 3 VPN to ping.

Type the IP address prefix and length of the VPN to ping.

Source Address

Specifies the source address of the ping request packet.

Type the source IP address—a valid address configured on a J Series device interface.

Locate LSP using interface name

Interface

Specifies the interface on which the ping requests are sent.

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

From the list, select the J Series device interface on which ping requests are sent. If you select any, the ping requests are sent on all interfaces.

Source Address

Specifies the source address of the ping request packet.

Type the source IP address—a valid address configured on a J series device interface.

Count

Specifies the number of ping requests to send.

From the list, select the number of ping requests to send. The default is 5 requests.

Detailed Output

Requests the display of extensive rather than brief ping output.

Select the check box to display detailed output.

Instance to which this connection belongs

Layer 2VPN Name

Identifies the Layer 2 VPN to ping.

Type the name of the VPN to ping.

Remote Site Identifier

Specifies the remote site identifier of the Layer 2 VPN to ping.

Type the remote site identifier for the VPN.

Source Address

Specifies the source address of the ping request packet.

Type the source IP address—a valid address configured on a J Series device interface.

Local Site Identifier

Specifies the local site identifier of the Layer 2 VPN to ping.

Type the local site identifier for the VPN.

Count

Specifies the number of ping requests to send.

From the list, select the number of ping requests to send. The default is 5 requests.

Detailed Output

Requests the display of extensive rather than brief ping output.

Select the check box to display detailed output.

Locate LSP from interface name

Interface

Specifies the interface on which the ping requests are sent.

From the list, select the J Series device interface on which ping requests are sent. If you select any, the ping requests are sent on all interfaces.

Source Address

Specifies the source address of the ping request packet.

Type the source IP address—a valid address configured on a J Series device interface.

Count

Specifies the number of ping requests to send.

From the list, select the number of ping requests to send. The default is 5 requests.

Detailed Output

Requests the display of extensive rather than brief ping output.

Select the check box to display detailed output.

Locate LSP from virtual circuit information

Remote Neighbor

Identifies the remote neighbor (PE router) within the virtual circuit to ping.

Type the IP address of the remote neighbor within the virtual circuit.

Circuit Identifier

Specifies the virtual circuit identifier for the Layer 2 circuit to ping.

Type the virtual circuit identifier for the Layer 2 circuit.

Source Address

Specifies the source address of the ping request packet.

Type the source IP address—a valid address configured on a J Series device interface.

Count

Specifies the number of ping requests to send.

From the list, select the number of ping requests to send.

Detailed Output

Requests the display of extensive rather than brief ping output.

Select the check box to display detailed output.

Ping end point of LSP

VPN Prefix

Identifies the LSP endpoint to ping.

Type either the LDP FEC prefix and length or the RSVP LSP endpoint address for the LSP to ping.

Source Address

Specifies the source address of the ping request packet.

Type the source IP address—a valid address configured on a J Series device interface.

Count

Specifies the number of ping requests to send.

From the list, select the number of ping requests to send.

Detailed Output

Requests the display of extensive rather than brief ping output.

Select the check box to display detailed output.

Ping MPLS Results and Output

Table 137 summarizes the output in the ping MPLS display. If the device receives no responses from the destination host, review the list after Table 137 for a possible explanation.

Table 137: J-Web Ping MPLS Results and Output Summary

Field

Description

Exclamation point (!)

Echo reply was received.

Period (.)

Echo reply was not received within the timeout period.

x

Echo reply was received with an error code. Errored packets are not counted in the received packets count and are accounted for separately.

number packets transmitted

number—Number of ping requests (probes) sent to a host.

number packets received

number—Number of ping responses received from a host.

percentage packet loss

percentage—Number of ping responses divided by the number of ping requests, specified as a percentage.

time

For Layer 2 circuits only, the number of milliseconds required for the ping packet to reach the destination. This value is approximate, because the packet has to reach the Routing Engine.

If the device does not receive ping responses from the destination host (the output shows a packet loss of 100 percent), one of the following explanations might apply:


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