Multiple Neighbors over a Layer 3 Fabric

With more than two switches, the first BGP peer for each switch can be created using the fabric-comm-vrouter-bgp-create CLI. You need to create the rest separately. Here is an example with switch-C added to the previous topology .

L3-Fabric-Multiple-Layers.png

Figure 5: An Example Fabric over Layer 3 Topology

The configuration for this will proceed along the same lines as before. In addition the following steps are required in order to bring switch-B into the fabric:

1. In switch-A, create BGP peering to swtich-C and create a static route to reach switch-C’s inband network. The way to extend this beyond three switches is to use this extra step in every switch that has more than one BGP peer:

 

switch-A> vrouter-interface-add vrouter-name vrouter-a ip 192.169.0.9/30 l3-port 11

switch-A> vrouter-bgp-add vrouter-name vrouter-a neighbor 192.169.0.10 remote-as 65003

switch-A> fabric-in-band-network-create 12.1.3.0/30

 

2. In switch-C, use the fabric-comm-vrouter-bgp-create command as before and connect:

 

switch-C> fabric-comm-vrouter-bgp-create name vrouter-c bgp-nic-l3-port 21 bgp-as 65003 bgpnic-

ip 192.169.0.10/30 in-band-nic-ip 12.1.3.10/24 remote-as 65001 neighbor 192.169.0.9

fabric-network 12.1.1.0/24 bgp-redistribute connected

switch-C> fabric-join switch-ip 12.1.1.1

Joined fabric myfabric. Restarting nvOS...