Hi,
**bleep** BGP 🙂
Here is the topology we are using:
CPE --> LNS1 --> Core 1 --> Cisco eBGP peer1 --> Loopback
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CPE --> LNS2 --> Core2 --> Cisco eBGP peer2 --> loopback
I have configured loopback interfaces on both eBGP peers to simulate Internet addresses. The addresses are different on the peers. I used 192.168.1.11/32 -12/32 - 13/32 on peer1 and 192.168.150.11/32 - 12/32 - 13/32 on peer 2.
I have configured a default route on Core1 and Core2 (Maybe this is wrong) as we need the customers entering on LNS1 to exit via Core1 and customers entering on LNS2 to exit via core2.
When I view the routing table on LNS1 I see the route to peer1 loopbacks as via the default and no BGP in the routing table (Perfect).
Likewise, when I look on LNS2 I see the routes for Peer2 loopbacks and no BGP routing table.
However, when I look at the route for peer1 on core2 I see the default as "Discard" but yet, when I look at the route for peer1 loopbacks on LNS2, it shows as via the default. I obviously cannot ping this.
It is the same the same vice versa too.
So, here are my questions:
1: Is this correct given that there is no iBGP currently?
2: Do I need to configure iBGP for failover if I want customers from LNS1 to exit via core2 (remembering that these core routers will have the internet routing table advertised to them so will be the same addresses)?
3: If the answer to 2 is yes, then how can I ensure that during normal operation customers from LNS1 exit via core1 and only via core2 if there is a failure?
It's a bit tricky trying to get an answer via google for these questions so please accept my apologies in advance
Thanks