configure mpls rsvp-te timers lsp rapid-retry
Configures the timers associated with rapidly retrying failed LSPs.
|percent||Specifies a percent increase in the interval allowed before each subsequent attempt to re-signal an LSP. The valid range is from 0 to 100 percent.|
|milliseconds||Specifies the time (in milliseconds) to wait before attempting to re-signal the LSP.|
|retry-limit||Specifies the maximum allowed attempts to establish an LSP.|
|number||Specifies a maximum number of allowed attempts to establish an LSP. The valid number range is from zero to 255.|
Delay interval: 500 milliseconds.
Decay rate: 50%.
Retry limit: 10.
This command configures the timers associated with rapidly retrying failed LSPs. If an LSP fails to establish, the switch attempts to rapidly retry the setup by sending additional path messages based on the rapid-retry timers. The delay-interval timer specifies the time (in milliseconds) to wait before sending another path message. If the LSP fails to establish itself on subsequent attempts, the delay-interval time is incremented based on the decay-rate setting. The decay operation multiplies the delay-interval time by the decay rate, and adds the result to the current delay-interval time.
For example, if the decay-rate is set to 50 percent and the current delay-interval time is 500 milliseconds, a path message is retransmitted in 750 milliseconds. If the LSP fails to establish on the next attempt, a path message is retransmitted after a further decayed delay interval of 1125 milliseconds (1.125 seconds). A per-LSP delay-interval time is maintained for each LSP until the LSP is established. This process of decaying the retry time continues until the LSP is established or the retry-limit expires. If the retry-limit is reached, attempts to rapidly retry the LSP are suspended.
When the switch starts the process of re-signaling the LSP based on the standard-retry timers, the LSP's rapid-retry timers return to the initial configuration settings. If the standard-retry delay-interval time is reached before all of the rapid-retry attempts have completed, the standard-retry mechanisms take over.
The default rapid-retry LSP timer parameter values are 500 milliseconds for the delay-interval, 50 percent for the decay-rate, and a retry-limit of 10. The valid range for delay-interval is 10 to 1000 milliseconds. The valid decay-rate range is 0 to 100 percent. The valid retry-limit is 0 to 100. A value of 0 indicates that the LSP is not re-signaled using the rapid-retry timers.
When summary-refresh or bundle-message is enabled, the rapid-retry timer values are used for resending any message that is not acknowledged.
The following command sets the maximum number of rapid retries to five:
configure mpls rsvp-te timers lsp rapid-retry retry-limit 5
This command was first available in ExtremeXOS 11.6.
This command is available only on the platforms that support MPLS as described in the Switch Engine 32.2 Feature License Requirements document.