90 minutes is a really long time, is it like that consistently? Are there any other performance issues on that segment? How many routes does the 2650 carry? It looks like the 2620 is doing inbound AS path filtering, how many routes does the 2650 send it that it has to process through that filter? Have you tried filtering outbound on the 2650, instead of or in addition to inbound on the 2620? That way only updates that the 2620 would accept would be sent down to it, less processing required.
~-----Original Message----- ~From: Neal Rauhauser 402-301-9555 [mailto:[EMAIL PROTECTED]] ~Sent: Thursday, July 11, 2002 4:30 PM ~To: [EMAIL PROTECTED] ~Subject: crazy slow BGP convergence - why? [7:48621] ~ ~ ~Below is the relevant config information from two Cisco 26xx routers ~separated by an ethernet switch. Neither is running more than 15% ~utilization but its taken ninety minutes for 950 routes to make it from ~the 2650 to the 2620. Why is this so slow? ~ ~> ~> !Cisco 2620, 64 meg, IOS 12.2.8T2 ~> router bgp 25943 ~> no synchronization ~> bgp log-neighbor-changes ~> network 63.170.237.0 mask 255.255.255.0 ~> network 63.170.238.0 mask 255.255.254.0 ~> neighbor 12.22.183.193 remote-as 20333 ~> neighbor 12.22.183.193 description Exanium Cisco 2650 peers ~/w 7018 & ~> 701 ~> neighbor 12.22.183.193 filter-list 1 in ~> no auto-summary ~> ~> ip as-path access-list 1 permit ^20333 701_ ~> ~> !Cisco 2650, 128 meg, peers with AS701 & AS7018 ~> router bgp 20333 ~> bgp log-neighbor-changes ~> network 12.22.183.192 mask 255.255.255.192 ~> network 12.36.200.0 mask 255.255.254.0 ~> network 12.36.210.0 mask 255.255.254.0 ~> network 12.108.204.0 mask 255.255.252.0 ~> neighbor 12.22.183.229 remote-as 25943 ~> neighbor 12.22.183.229 description WispAir border router AS 25943 ~> neighbor 12.22.183.229 distribute-list 66 in ~> access-list 66 deny any ~> ~ ~ ~ ~ ~ex2620#sh ip bg su ~BGP router identifier 63.170.237.254, local AS number 25943 ~BGP table version is 3094, main routing table version 3094 ~1004 network entries and 993 paths using 137108 bytes of memory ~300 BGP path attribute entries using 19080 bytes of memory ~295 BGP AS-PATH entries using 8940 bytes of memory ~0 BGP route-map cache entries using 0 bytes of memory ~317 BGP filter-list cache entries using 3804 bytes of memory ~BGP activity 1731/6097 prefixes, 1888/895 paths, scan interval 60 secs ~ ~Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down ~State/PfxRcd ~12.22.183.193 4 20333 1941 107 3087 0 0 01:42:49 ~991 ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~> -- ~> Neal Rauhauser CCNP, CCDP voice: 402-301-9555 ~> mailto:[EMAIL PROTECTED] fcc : k0bsd ~> "They say it takes hardship, boy, to let you love the rest, ~> sometimes underneath the load is where I show my best" - Widespread ~> Panic ~ ~-- ~=============================================================== ~============== ~mailto:[EMAIL PROTECTED] phone: 402-301-9555 ~=============================================================== ~============== ~ ~ ~ ~ ~Report misconduct ~and Nondisclosure violations to [EMAIL PROTECTED] ~ Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=48624&t=48621 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
