BGP Route

[HS08]

I have 4 spoke connected to the HUB.

HUB LAN 10.103.0.0/16

SPOKE1 10.107.0.0/16

SPOKE2 10.100.0.0/16

SPOKE3 10.102.0.0/16

SPOKE4 10.101.0.0/16

Connection from every spoke to hub use 3 different connection (2 using internet and 1 using WAN)

if we see in the BGP routing why :

route to 10.100.0.0/16 and 10.102.0.0/16 only have one entry?

route to 10.101.0/0/16 and 10.103.0.0/16 (HUB) have 3 entry?

[Richie_C]

Hi @HS08 

I would start by checking if all BGP peers are up  and routes are received from the BGP peer spoke sites. You can do that with get router info bgp sum. Make sure all of the peers are established and the prefix is being received.  you can see the received prefixes in the last column. See the following example:

If the BGP sessions are established i would then do the following:

get router info bgp network - Check that you see all of the BGP prefixes in the BGP table

You can also use the following commands to help make sure that the prefixes are sent and received.

get router info bgp neighbors <neighbor-IP> received-routes - Run on the hub 

get router info bgp neighbors <neighbor-IP> advertised-routes - Run on spoke

I hope that helps.

[Toshi_Esumi]

Probably because you're using ADVPN and this particular location lost the tunnel to the HUB. That's why you're getting three same HUB route from other three spokes.

Toshi