R3303-HP HSR6800 Routers MPLS Configuration Guide

NOTE:

RSVP hello extension is configured to detect node failures caused by problems such as signaling error

other than failures caused by link failures.

Configuring the FRR polling timer

The protection provided by FRR is temporary. Once a protected LSP becomes available again or a new

LSP is established, traffic is switched to the protected or new LSP. After this switchover, the PLR polls

available bypass tunnels for the best one at the regular interval specified by the FRR polling timer:

To configure the FRR polling timer:

Ste

Command

Remarks

1. Enter system view of the PLR

node.

system-view N/A

2. Enter MPLS view.

mpls N/A

3. Configure the FRR polling

timer.

mpls te timer fast-reroute

[ seconds ]

Optional.

The FRR polling timer is 300

seconds by default.

Inspecting an MPLS TE tunnel

When an MPLS TE tunnel fails or affects data forwarding due to performance degradation, the control

plane cannot detect the fault or cannot do so in time. This brings difficulty to network maintenance. To

detect MPLS TE tunnel failures in time and locate the failed node, the device provides the following

mechanisms:

• MPLS LSP ping

• MPLS LSP tracert

Configuring MPLS LSP ping

MPLS LSP ping can be used to test the connectivity of an MPLS TE tunnel. At the ingress, it adds the label

of the tunnel into an MPLS echo request, and sends it along the MPLS TE tunnel to the egress. The ingress

determines whether the MPLS TE tunnel is normal according to whether it can receive a reply from the

egress.

To test the connectivity of an MPLS TE tunnel:

Task Command

Remarks

Use MPLS LSP ping to test the

validity and connectivity of an

MPLS TE tunnel.

ping lsp [ -a source-ip | -c count |

-exp exp-value | -h ttl-value | -m

wait-time | -r reply-mode | -s

packet-size | -t time-out | -v ] * te

interface-type interface-number

Available in any view.