protect-adaptivity linear

protect-adaptivity linear

Configures the backup path to recompute its SPF using the defined interval when a "better" path becomes available.

Syntax: protect-adaptivity linear [bw_1 time_1]...[bw_n time_n] spf resv_amount time reroute [percent_1 time_1]...[percent_n time_n] jitter percent

no protect-adaptivity

spf resv_amount time

Each resv_amount/time pair specifies the size of the backup path and the delay associated with recomputing that backup path.

resv_amount - Specifies reservation amount available along the complete path taken by the backup path. Backup path reservations for the specified amount of bandwidth are recomputed using the associated timer specified by the time value.

time - Specifies the time the PLR waits before recomputing the associated backup path.

Valid values are 0.0 - 4294967.00 <s | ms> where s is seconds and ms is milliseconds.

reroute percent time

Each percent/time pair specifies the size of the backup path and the delay associated with rerouting that backup path.

percent - Specifies a percentage of the maximum bandwidth available along the complete path taken by the backup path. Backup path reservations for the specified amount of bandwidth are re-routed using the associated timer specified by the time value.

time - Specifies the time the PLR waits before rerouting the associated backup path.

Valid values are 0.0 - 4294967.00 <s | ms> where s is seconds and ms is milliseconds.

jitter percent

Specifies a percentage the timer is offset to prevent the establishment of many backup paths at the same time. Valid values are 0.0000% - 100.0000%.

Description: The protect-adaptivity attribute determines how a backup path responds when new network resources become available or when resource parameters change such that preferred paths become available. There are four protect-adaptivity methods: disabled, pinned, periodic, and linear.

The linear method associates two or more bandwidth reservation and timer segments in a line that provides a linear relationship between any two segments in the line.

In order to use the linear model, you must configure at least two reservation amounts and their associated timers. You must configure the reservation amounts in descending order and their associated times in ascending order.

Use the protect-adaptivity linear command to configure the backup path to recompute its SPF using the linear model.

Use the no protect-adaptivity command to remove the protect-adaptivity specification.

Factory Default: Periodic 3600s jitter 720.

Command Mode: If the PLR is the primary tunnel ingress: Traffic engineering tunnel, Traffic engineering parameter-set, traffic engineering tunnel default, and traffic engineering midpoint default.
If the PLR is a primary tunnel midpoint: Traffic engineering midpoint default and traffic engineering tunnel default.

Example: In the following example, the protect-adaptivity linear spf command configures the backup path to:

Recompute backup paths that have a reservation of 50 Mb/sec., using a 3 second timer, then

Recompute backup paths that have a reservation of 45 Mb/sec., using a 10 second timer, then

Recompute backup paths that have a reservation of 40 Mb/sec., using a 20 second timer, then

Recompute backup paths that have a reservation of 30 Mb/sec., using a 180 second timer, then

Recompute backup paths that have a 0% reservation, using a 600 second timer.

Reroute those backup paths that have discovered a better path starting with those backup paths that have a 100% reservation and using a 0 second (no delay) timer,

Reroute those backup paths that have discovered a better path ending with those backup paths that have a 0% reservation and using a 60 second timer.

Add or subtract a jitter of 25% of the specified timers to prevent backup paths of the same size from attempting to recompute at the same time.

router(config)#mpls te ospf

router(config-te)#midpoint default

router(config-te-midpoint-default)#protect-adaptivity linear spf 50 3s 45 four 10s 40 20s 30 180s 0 600s reroute 100% 0s 0% 60s jitter 25%

Related Commands: midpoint default
protect-adaptivity disabled
protect-adaptivity periodic
protect-adaptivity pinned

spf resv_amount time	Each resv_amount/time pair specifies the size of the backup path and the delay associated with recomputing that backup path. resv_amount - Specifies reservation amount available along the complete path taken by the backup path. Backup path reservations for the specified amount of bandwidth are recomputed using the associated timer specified by the time value. time - Specifies the time the PLR waits before recomputing the associated backup path. Valid values are 0.0 - 4294967.00 <s \| ms> where s is seconds and ms is milliseconds.
reroute percent time	Each percent/time pair specifies the size of the backup path and the delay associated with rerouting that backup path. percent - Specifies a percentage of the maximum bandwidth available along the complete path taken by the backup path. Backup path reservations for the specified amount of bandwidth are re-routed using the associated timer specified by the time value. time - Specifies the time the PLR waits before rerouting the associated backup path. Valid values are 0.0 - 4294967.00 <s \| ms> where s is seconds and ms is milliseconds.
jitter percent	Specifies a percentage the timer is offset to prevent the establishment of many backup paths at the same time. Valid values are 0.0000% - 100.0000%.

router(config)#mpls te ospf router(config-te)#midpoint default router(config-te-midpoint-default)#protect-adaptivity linear spf 50 3s 45 four 10s 40 20s 30 180s 0 600s reroute 100% 0s 0% 60s jitter 25%

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    Last Updated: 12/19/04 at 14:59:39

protect-adaptivity linear

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