Facility backup over an adaptive bypass lsp – Brocade Multi-Service IronWare Multiprotocol Label Switch (MPLS) Configuration Guide (Supporting R05.6.00) User Manual
Page 91
Multi-Service IronWare Multiprotocol Label Switch (MPLS) Configuration Guide
67
53-1003031-02
MPLS Fast Reroute using facility backup over a bypass LSP
1
Example
Brocade(config-mpls)# bypass-lsp 123
Brocade(config-mpls-bypasslsp-123)# exclude-interface ethernet 1/1 ethernet 1/3
Brocade(config-mpls-bypasslsp-123)# exclude-interface ethernet 1/1 ethernet 1/3
to 1/4
Syntax: [no] exclude-interface ethernet|pos|ve slot/port [ethernet|pos|ve slot/port | to slot/port]
Facility backup over an adaptive bypass LSP
Adding the adaptive capability to a bypass LSP enables the following capabilities:
•
An enabled bypass LSP can switch to a lower cost route, when one becomes available. This
action is known as path reoptimization. Calculation of such a route can occur on demand, or
periodically, based on the expiration of a configurable reoptimization timer.
•
The user can modify LSP parameters on an enabled bypass LSP. Without the adaptive
capability, the user must disable the bypass LSP before the user can modify its parameters.
shows an example of an adaptive bypass LSP for which a lower-cost route has been
signaled. In this case, the original bypass LSP was configured to take the route beginning at the
Point of Local Repair (PLR) at R2, through R6 and R7, and finally to the merge point at R4. A
recalculation found a lower-cost route and re-routed the bypass LSP through R10 and R11, instead
of R6 and R7. The Point of Local Repair does not change, nor does the merge point.
FIGURE 16
Adaptive bypass LSP