H3C Technologies H3C SR8800 - Manual (Page 90)

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Configuration prerequisites
Before you configure FRR, complete the following tasks:
• Configure IGP, ensuring that all LSRs are reachable
• Configure MPLS basic capabilities
• Configure MPLS TE basic capabilities
• Establish an MPLS TE tunnel with RSVP-TE
• Set up primary LSPs
Configuration procedure
Enabling FRR on the headend of a primary LSP
To enable FRR on the headend of a primary LSP:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter tunnel interface view of
the primary 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. However, a bypass LSP cannot be configured with FRR. That is, a bypass LSP
cannot act as a primary LSP to be protected by another LSP at the same time.
When specifying a bypass tunnel for an interface, make sure that:
• 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 is used to
determine which of them should be used in case failure occurs.
Your router has restriction on links that use the same bypass tunnel so that their total bandwidth does not
exceeds a specific value.
To configure a bypass tunnel on its PLR:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter interface view of the
bypass tunnel.
interface tunnel tunnel-number N/A