01-31-2012 03:49 AM - edited 03-04-2019 03:04 PM
Hi,
Need help to troubleshoot BGP IDLE/Active state in my company network.
Our monitoring team has given me the list of BGP Active/idle neighbor details, almost 100 neighbor are either in active or idle state and asked to troubleshoot. Its a very big Banking network and i am not allowed to make any changes till i prepare complete troiubleshooting/configuration steps.
could any one share me any solid troublshooting steps/doc for BGP Idle or Active states.
Regards:
amar
01-31-2012 05:21 AM
Amar,
Maybe this wil help
http://meetings.ripe.net/ripe-44/presentations/ripe44-eof-bgp.pdf
well in a nut shell you might want to chek the following
.1. ip reachability
2 TCP port 179 allowed across the peers
3. MTU stuff
4. multihop and peer TTL configurations
5. BGP authentication
6. incorrect AS
HTH
Ksihore
07-19-2017 05:43 PM
I read this presentation http://meetings.ripe.net/ripe-44/presentations/ripe44-eof-bgp.pdf which helped me a lot and can you post same slides for EIGRP troubleshooting also.
Thanks in advance
04-05-2018 04:06 PM
Hi, Do you have a similar guide for OSPF and MPLS... Good Document for BGP.
Thanks in advanced
Regards
04-06-2021 04:32 AM
Thanks a lot, it's very helpful
02-01-2012 07:05 AM
There are several things to check.
I am assuming you can perform show commands and basic ping?
1. Show IP BGP summary
--This command will give you some basic details of the neighbors.
--You can use this to verify the output you received for the idle and active states.
2. ping
--If you cannot ping the neighbor then the BGP session will not come up
3. Show run | b router bgp
--Use this to verify the remote-as
--Also you can verify if the connection has ebgp multihop count configured correctly
--can check the config to see if a password is set
Once all of this is verified you can then check with the ISP to verify what they see. None of this involves any changes in config or debugs.
02-08-2012 12:40 PM
can you paste just the BGP configs. of two neighbors that are stuck idle/active (please note if they are not directly connected and if not how many router hops to the neighbor) and whether or not you can ping each of them from the other.
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