Brocade Multi-Service IronWare Multiprotocol Label Switch (MPLS) Configuration Guide (Supporting R05.6.00) - Manual (Page 62)

38 Multi-Service IronWare Multiprotocol Label Switch (MPLS) Configuration Guide
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Auto-bandwidth for RSVP LSPs
1
TABLE 4 Basic auto-bandwidth functionality
Configuration considerations
• This feature must not be used when a strict bandwidth guarantee is to be provided.
• This feature is only valid for adaptive LSPs.
• When auto-bandwidth is enabled on an LSP and it is not in monitor-only mode and a failover to
secondary LSP occurs, the secondary LSP is set up with the configured mean-rate, and the
auto-bandwidth process restarts for the secondary LSP when it is adaptive. Therefore, every
time the active path changes, auto-bandwidth process starts afresh, with initial bandwidth as
the traffic-eng configured bandwidth on that path.
• A re-optimization event, when triggered, signals the LSP using the current bandwidth and not
the highest-sampled bandwidth calculated so far with the auto-bandwidth feature.
• When auto-bandwidth is configured on an LSP, and a change in mean-rate is committed, the
auto-bandwidth statistics and counters are cleared, and the entire procedure starts afresh.
• After a switchover, failover, or hitless-reload of MP, the auto-bandwidth counters are cleared.
• Auto-bandwidth is not supported for bypass LSPs.
• Auto-bandwidth continues to function despite FRR failover to the backup path. Irrespective of
whether it is a detour or facility backup, or the repair occurred at ingress or transit, the
auto-bandwidth process continues. In case of adjustment event occurring while the LSP is
repaired, the retries for new instance of protected path is signaled with the new bandwidth.
When the new-instance does not come up, the backup remains active.
• The system maximum for LSP accounting must be set for this feature to work. Only those LSPs
for which rate counters are allocated on the LP have the auto-bandwidth functionality working.
NOTE
A system reload is needed after changing the system-max lsp-out-acl-cam value command.