R3303-HP HSR6800 Routers MPLS Configuration Guide

A bypass tunnel only forwards data traffic when a protected tunnel fails. To allow a bypass tunnel to also

forward data traffic when the protected tunnels are normal, you must make sure that the bypass tunnel

has adequate bandwidth.

A bypass tunnel cannot be used for services like VPN.

NOTE:

• The FRR feature is not supported when the signaling protocol is CR-LDP.

• Do not configure both FRR and RSVP authentication on the same interface.

Before you configure FRR, complete the following tasks:

• Configure IGP, making sure that all LSRs are reachable.

• Configure basic MPLS.

• Configure basic MPLS TE.

• Establish an MPLS TE tunnel with RSVP-TE.

• Set up primary LSPs.

Enabling FRR on the ingress node of a protected LSP

Ste

Command

Remarks

1. Enter system view.

system-view N/A

2. Enter tunnel interface view of

the protected LSP.

interface tunnel tunnel-number N/A

3. Enable FRR.

mpls te fast-reroute Disabled by default.

4. Submit current tunnel

configuration.

mpls te commit N/A

Configuring a bypass tunnel on its PLR

After a tunnel is specified to protect an interface, its corresponding LSP becomes a bypass LSP. The setup

of a bypass LSP must be manually performed on the PLR. The configuration of a bypass LSP is similar to

that of a common LSP, but a bypass LSP cannot act as an LSP to be protected by another LSP at the same

time.

When specifying a bypass tunnel for an interface, ensure the following:

• The bypass tunnel is up.

• The protected interface is not the outgoing interface of the bypass tunnel.

Up to three bypass tunnels can be specified for a protected interface. The best-fit algorithm determines

which of them is used in case a failure occurs.

Your device has a restriction on links that use the same bypass tunnel so their total bandwidth does not

exceeds a specific value.

To configure a bypass tunnel on its PLR: