Monitoring MPLS LSP Statistics

Purpose

Display statistics for LSP sessions currently active on the device, including the total number of packets and bytes forwarded through an LSP.

Action

Select Monitor>MPLS>LSP Statistics in the J-Web user interface, or enter the show mpls lsp statistics command.

Statistics are not available for LSPs on the outbound device, because the penultimate device in the LSP sets the label to 0. Also, as the packet arrives at the outbound device, the hardware removes its MPLS header and the packet reverts to being an IPv4 packet. Therefore, it is counted as an IPv4 packet, not an MPLS packet.

Table 89 summarizes key output fields in the MPLS LSP statistics display.

Table 89: Summary of Key MPLS LSP Statistics Output Fields

Field

Values

Additional Information

Ingress LSP

Information about LSPs on the inbound device. Each session has one line of output.

Egress LSP

Information about the LSPs on the outbound device. Each session has one line of output.

MPLS learns this information by querying RSVP, which holds all the transit and outbound session information.

Transit LSP

Number of LSPs on the transit routers and the state of these paths.

MPLS learns this information by querying RSVP, which holds all the transit and outbound session information.

To

Destination (outbound device) of the session.

From

Source (inbound device) of the session.

State

State of the path: Up, Down, or AdminDn.

AdminDn indicates that the LSP is being taken down gracefully.

Packets

Total number of packets received on the LSP from the upstream neighbor.

Bytes

Total number of bytes received on the LSP from the upstream neighbor.

LSPname

Configured name of the LSP.

Total

Total number of LSPs displayed for the particular type—ingress (inbound), egress (outbound), or transit.

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