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max-route-instances
Enables/disables limit checking and configures the maximum number of route instances across all BGP sessions.
Syntax: max-route-instances [value | no-limit]
value
Sets the maximum number of route instances allowed in the routing table to the specified number. Valid values are 0 - 4,294,967,295.
no-limit
Disables limit checking for number of route instances.
Description: Large numbers of BGP routes instances and can strain the resources of the Avici router server. The max-route-instances command enables limit checking on the number of route instances on the Avici router. If the limit is reached, additional routes are gracefully discarded without resetting the BGP sessions.
Use the max-route-instances value command to enable limit checking and set the maximum number of route instances to the specified number.
NOTE The current number of routes instances must be LESS than the specified number.
Use the max-route-instances no-limit command to disable limit checking.
NOTE When limit checking is disabled, the Avici router will accept routes until the processing limits of the server are reached. Additional routes may cause the Avici router to reset.
Factory Default: Limit checking for number of route instances is disabled, with a default value of 0.
Command Mode: Router configuration.
Example 1: In the following example:
- The router bgp command enables BGP routing and associates the router with autonomous system 101.
- The max-route-instances command enables limit checking on the number of route instances, and sets the maximum number allowed at 1,500,000.
- The show ip bgp route-dropped-sessions command displays the new setting:
router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
router(config)#router bgp 101
router(config-router)#max-route-instance 1500000
router(config-router)#end
router#sho ip bgp route-dropped-sessions
Bgp Soft Landing Global Statistics
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Maximum Bgp Route Instances Check : Enabled
Current Number of Bgp Routes Instances : 102914
Configured Maximum Bgp Route Instances : 1500000
Example 2: The following sample output of show ip bgp route-dropped-sessions displays routes that have been dropped due to exceeding the threshold configured using the max-route-instances command:
Bgp Soft Landing Global Statistics
Reason for dropping first Route :Max. Bgp Route Instances Exceeded
Time Since First Dropped :0:00:39
Maximum Bgp Prefix Check :Enabled
Current Number of Bgp Prefixes :10000
Configured Maximum Bgp Prefixes :450000
Minimum System Memory Check :Enabled
Current Free System Memory :85
Configured Minimum System Memory :10
Maximum Bgp Route Instances Check :Enabled
Current Number of Bgp Routes Instances :10000
Configured Maximum Bgp Route Instances :10000
Bgp Soft Landing Peer Statistics
Neighbor AS PfxRcd PfxDropped Time Reason
190.1.1.1 200 10000 5001 0:00:39 Max. Bgp Route Instances Exceeded
Example 3: In the following example:
- The router bgp command enables BGP routing and associates the router with autonomous system 101.
- The max-route-instances no-limit command disables limit checking on the number of route instances.
- The show ip bgp route-dropped-sessions command displays the new setting:
router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
router(config)#router bgp 101
router(config-router)#max-route-instances no-limit
router(config-router)#end
router#sho ip bgp route-dropped-sessions
Bgp Soft Landing Global Statistics
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Maximum Bgp Route Instances Check : Disabled
Current Number of Bgp Routes Instances : 102914
Configured Maximum Bgp Route Instances : 0
Related Commands: clear ip bgp route-dropped-sessions
max-unique-prefixes
min-memory-threshold
router bgp
show ip bgp
show ip bgp routes-dropped-sessions
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Copyright © 2004
Avici Systems Inc.
Avici® and TSR®
is a registered trademark of Avici Systems Inc.
IPriori™, Composite Links™, SSR™, QSR, and NSR® are
trademarks of Avici Systems Inc.
Source
File Name: BGP_Nd.fm
HTML File Name: BGP_Nd21.html
Last Updated: 05/10/04 at 16:36:55