Brocade Multi-Service IronWare Multiprotocol Label Switch (MPLS) Configuration Guide (Supporting R05.6.00) - Manual (Page 90)

66 Multi-Service IronWare Multiprotocol Label Switch (MPLS) Configuration Guide
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MPLS Fast Reroute using facility backup over a bypass LSP
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FIGURE 15 Excluded interfaces on a PLR
Bypass LSP, like one-to-one backup, fits within the scope of MPLS Traffic Engineering, so the
configuration of bypass LSP includes elements of traffic engineering. For example, setting up a
bypass LSP relies on RSVP and CSPF. In fact, CSPF is automatically enabled on a bypass LSP and,
therefore, does not appear as a configurable option at the bypass LSP configuration level.
CLI differences between a protected LSP and a bypass LSP
In the Fast Reroute context of MPLS LSP configuration, the user can request facility backup. For
example, to request facility backup for LSP xmr2-199, use the following command.
Brocade(config-mpls-xmr2-199-frr)# facility-backup
For the configuration of a bypass LSP, certain parameters are either unsupported or unnecessary.
These are:
• CSPF (because it is always enabled)
• BFD (not supported in this release)
• Commit
• Secondary path
• FRR
• Selected path
• IPMTU
• Metric
• Revert-timer
• Select-path
• Shortcuts
In contrast, the parameter that is unique to bypass LSP is the specification of excluded interfaces,
which can be embodied as individual interfaces, ranges of interfaces, groups, or LAGs. With bypass
LSP 123.