Brocade Multi-Service IronWare Multiprotocol Label Switch (MPLS) Configuration Guide (Supporting R05.6.00) - Manual (Page 189)

Multi-Service IronWare Multiprotocol Label Switch (MPLS) Configuration Guide 165
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Configuring a bypass LSP to be adaptive
1
The name must be unique among all regular LSPs and bypass LSPs.
Syntax: [no] exclude-interface linkid, linkid, linkid-begin-linkid-end
Syntax: [no] exclude-any group
Configuring a bypass LSP to be adaptive
The user can configure a bypass LSP to be adaptive using the adaptive command. The user can
further configure an adaptive bypass LSP as follows:
• Control when the bypass LSP path gets reoptimized either by manually causing immediate
path reoptimization using the mpls reoptimize command, or by setting a timer to reoptimize
the path periodically using the reoptimize-timer command.
• Change parameters for an enabled bypass LSP without having to disable it.
A new instance of the LSP is signaled following path reoptimization or a change in LSP parameters
and the old path is released.
NOTE
Unlike regular adaptive LSPs, new path signaling does not take place on an adaptive bypass LSP that
has traffic flowing through it.
Specifying a bypass LSP to be adaptive
To specify an LSP to be adaptive, use the adaptive command in the bypass LSP context. By default,
bypass LSPs are not adaptive. The LSP must be in the disabled state before the user enters the
adaptive command. When the user has specified the LSP to be adaptive, the user can enable the
LSP. In this example, the xm4-by LSP is configured to be adaptive.
Brocade(config)# router mpls
Brocade(config-mpls)# bypass-lsp xm4-by
Brocade(config-mpls-bypasslsp-xm4-by)# adaptive
Brocade(config-mpls-bypasslsp-xm4-by)# enable
Syntax: [no] adaptive
Reoptimizing a bypass LSP
Under ordinary conditions, an LSP path does not change unless the path becomes inoperable.
Consequently, the device needs to be directed to consider configuration changes made to an LSP
and to optimize the LSP path based on those changes. As with regular LSPs, one way to do this for
a bypass LSP is to enter the mpls reoptimize command as shown in the following example.
Brocade# mpls reoptimize lsp xm4-by
Syntax: mpls reoptimize all | lsp lsp-name
The all option directs the router to reoptimize the paths for all LSPs configured, including bypass
LSPs.
The lsp lsp-name option directs the router to reoptimize the path for the specified LSP.