H3C Technologies H3C S7500E Series Switches - Manual (Page 120)

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z
Configure MPLS basic capabilities
z
Configure MPLS TE basic capabilities
z
Establish an MPLS TE tunnel with RSVP-TE
z
Set up primary LSPs
Configuration Procedure
Configuring FRR involves these tasks:
z
Enabling FRR on the headend of a primary LSP
z
Configuring a bypass tunnel on its PLR
z
Configuring node protection
z
Configuring the FRR polling timer
Enabling FRR on the headend of a primary LSP
Follow these steps to enable FRR on the headend of a primary LSP:
To do… Use the command... Remarks
Enter system view system-view ––
Enter tunnel interface view of the
primary LSP
interface tunnel tunnel-number ––
Enable FRR mpls te fast-reroute
Required
Disabled by default
Submit current tunnel
configuration
mpls te commit Required
Configuring a bypass tunnel on its PLR
After a tunnel is specified to protect an interface, its corresponding LSP becomes a bypass LSP.
Setting up a bypass LSP must be manually performed on its headend, also called point of local repair
(PLR), which must be a part of the primary LSP but must not be the tail of the primary LSP.
Configuring a bypass LSP is the same as configuring a common LSP except that you cannot configure
the FRR attribute on a bypass LSP. In other words, an LSP cannot be both primary and bypass. In
addition, nested LSP protection is not allowed.
When specifying a bypass tunnel for an interface, make sure that:
z
The bypass tunnel is up.
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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 device has restriction on links that use the same bypass tunnel so that their total bandwidth does
not exceeds a specified value.
Follow these steps to configure a bypass tunnel on its PLR: