05-02-2015 10:28 AM
I have two nodes (XR and NX7K) running in my testing network.
I can ping each other (10.187.227.1 and 10.187.227.2) XR and NX7K nodes respectively.
However the BGP session is not being established successfully.
Can someone point me to where the problem is?
XR
RP/0/0/CPU0:ios#show ip bgp summ
(...)
Process RcvTblVer bRIB/RIB LabelVer ImportVer SendTblVer StandbyVer
Speaker 2 1 2 0 1 2
Some configured eBGP neighbors (under default or non-default vrfs)
do not have both inbound and outbound policies configured for IPv4 Unicast
address family. These neighbors will default to sending and/or
receiving no routes and are marked with '!' in the output below.
Use the 'show bgp neighbor <nbr_address>' command for details.
Neighbor Spk AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down St/PfxRcd
10.187.227.2 0 65505 0 40 0 0 0 00:00:00 Idle! <=========== It remains in 'idle'
RP/0/0/CPU0:ios#show run | b bgp
Sat May 2 11:06:36.066 UTC
Building configuration...
router bgp 65405
address-family ipv4 unicast
network 10.187.227.0/24
network 192.168.200.1/32
!
neighbor 10.187.227.2
remote-as 65505
address-family ipv4 unicast
!
!
!
end
===================================================
NX7K SWITCH
!Command: show running-config bgp
!Time: Sat May 2 11:03:49 2015
version 7.1(0)D1(1)
feature bgp
router bgp 65505
router-id 192.168.200.2
address-family ipv4 unicast
network 10.187.227.0/24
network 192.168.200.2/32
neighbor 10.187.227.1 remote-as 65405
05-07-2015 12:52 PM
configuration looks correct !!!
Just dont forget to add a route-policy inbound and outbound in XR for eBGP connections, otherwise you wont receive nor propagate routes.
neighbor 10.187.227.2
remote-as 65505
address-family ipv4 unicast
route-policy POLICY in
route-policy POLICY out
cheers
05-08-2015 04:54 AM
what is missing is the bgp router ID configuration on the XR side.
if you enable debug bgp event you'll see it complaining about that I am sure.
The RPL config is necessary to exchange and import routes but even without the peering should come up.
configure a bgp router id and I think you'll see it working right away.
xander
05-07-2015 10:18 PM
Hello,
Could you please add router-id on the XR device. Secondly, i see that there are no msgRcvd counters incrementing on XR device. Which means, either the XR device is not processing it or Nexus device is not sending it. Could you please check if you have the reachability on the connected interface and there is no ACL as such which might be blocking it.
Please share the show bgp summary output from the nexus side as well
Regards
Vinit
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