Brocade Multi-Service IronWare Multiprotocol Label Switch (MPLS) Configuration Guide (Supporting R05.6.00) - Manual (Page 95)

Multi-Service IronWare Multiprotocol Label Switch (MPLS) Configuration Guide 71
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Adaptive Fast Reroute (FRR) and Global Revertiveness
1
• hop-limit
• include-all
• include-any
• priority
For instructions on how to configure an adaptive FRR LSP, refer to “Configuring MPLS Fast Reroute
using one-to-one backup” .
Global Revertiveness
NOTE
Local revertiveness is not supported in this release.
When failover happens, traffic continues to flow in backup. When global revertiveness for FRR is
configured, a new LSP is created from the ingress after the ingress learns about the failover. The
new LSP is protected with a backup LSP, if possible. When the primary LSP fails for the second
time, it may still be protected when there is a backup path available.
When secondary path is configured along with global revertive configuration, then when new
instance of global revertive is triggered, the secondary path is also triggered. After “n” number of
retries configured by user for establishing new instance for global revertiveness, traffic switches to
the secondary path. The retry limit is configured in mpls policy mode. When the retry limit is not
configured, then new instance establishment is tried infinite times.
Configuring global revertiveness
Global revertiveness is enabled by default for LSPs with FRR and adaptive enabled. The revertive
mode global command can be executed only on LSPs with FRR and adaptive enabled. To enable
global revertiveness, enter commands such as the following.
NOTE
When adaptive is disabled, then global revertiveness is also disabled.
Brocade(config-mpls)# lsp t1
Brocade(config-mpls-lsp-t1)# adaptive
Brocade(config-mpls-lsp-t1)# frr
Brocade(config-mpls-lsp-t1-frr)# revertive mode global
Syntax: [no] revertive mode global
The [no] option disables global revertiveness on an LSP.