10-02-2003 04:04 AM - edited 03-02-2019 10:44 AM
Hi,
I have two routers with two different isps running BGP. The two routers running ibgp, each are getting routes from the outside just fine.
However, when connected together the router 2 does not seem to be able to keep all the routes that router 1 is trying to give him.
I keep showing the #1 & #2 router receive all the routes, and then slowly give them up. When I debug ip bgp updates on #2 I been getting:
*Oct 2 05:18:24: BGP(0): 66.90.64.50 write queue size of 205 exceeded limit of 100 messages
I have no sync on both sides (both are advertising a /19. Both have no auto-summary.
bgp looks like this:
neighbor <ip> remote-as <as>
neighbor <ip> next-hop-self
that's it pretty much.
both have a default route set statically with their isps.
Please someone shed some light on this for me :( Why doesn;t it keep the full 100K bgp table? Why does it go up/down? What does that error message mean and how do I fix it?
-GK
10-02-2003 05:13 AM
Hello,
What router model is it (e.g. 7507/RSP4) and how much DRAM do you have please?
10-02-2003 10:21 AM
cisco 7206VXR (NPE300) processor (revision B) with 229376K/65536K bytes of memory.
R7000 CPU at 262Mhz, Implementation 39, Rev 1.0, 2s56KB L2, 2048KB L3 Cache
6 slot VXR midplane, Version 2.0
10-02-2003 01:29 PM
It could be related to CSCdp63037:
>There appears to be a problem with us handling a "passive" BGP connection
>with a non-cisco peer. As a work around we have to apply an inbound
>access-list to the interface(s) that we use to connect to the peer. For
>the lab router that we were using I applied the following ACL:
>
>access-list 101 deny tcp host 154.16.1.1 any eq bgp
>access-list 101 deny tcp host 154.16.2.1 any eq bgp
>access-list 101 permit ip any any
>
>
>This ACL will deny any packets coming from the peer to port 179, causing
>us to always open the BGP session "Actively". We were then able to
>correctly open a session with peers 154.16.1.1 and 154.16.2.1.
Are there any !Cisco routers involved? I would try the workaround above to see if that fixes it.
http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCdp63037
Russ.W
10-02-2003 01:38 PM
Thanks for the help Russ. You helped me yesterday with the 3 isp bgp problem with my XO. This is on that XO router.
I will try this tonight and see how it goes.
Our side is all Cisco gear :) I am unsure what the other side is using.
-GK
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