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BGP Router process - Memory holding - reg

1) What is the significance of "holding memory" in the BGP Router Process as seen in SHOW PROCESS MEMORY output? I am seeing more memory is being occupied in most of the routers against calculating the memory occupied by the prefixes received from all the bgp neighbors in that router.

2) Also even if a bgp neighbor advertises prefixes which are filtered not to receive, the prefixes occupies memory resource. Is there anyway apart from not configuring "neighbor soft-reconfiguration in", we can stop these prefixes using the router resources?

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Re: BGP Router process - Memory holding - reg

I have observed the 'Allocated memory' in the output changing with different number of prefixes. I am not sure how often the Holding memory size will change. It could change depend on certain number of prefixes. You can anyway look at the following docs to know about BGP and memory consumption :

http://www.cisco.com/warp/public/459/41.shtml

http://www.cisco.com/warp/public/63/mallocfail.shtml

Instead of 'soft reconfiguration in', you can use the route-refresh or Dynamic Inbound Soft Reset feature which is available from IOS 12.1 release. Both routers must support this feature. It does not use memory to store prefixes like soft inbound.

http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121cgcr/ip_c/ipcprt2/1cdbgp.htm#1001190

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