Hello,
I'm struggling with this and wonder if you could help.
Imagine that I have an environment with many leaf switches acting as top of racks with certain infrastructure connecting to specific leaf switches. In this scenario a layer 3 bridge domain might only be configured on one leaf or one VPC pair.
I know that I can easily use the GUI to find which leaf switches will own the IP addresses of my bridge domains. What I'm trying to ascertain is how can I find this using the NX-OS CLI from leaf switches that don't own the BDs?
Scenario: I have a Layer 3 bridge domain 10.1.1.0/24 with an SVI address of 10.1.1.1 owned by leaf switch 10. This BD is configured under vrf1 within mytenant. If I check the routing for this network on leaf switch 10 I can see that it is a locally connected network.
leaf-switch-10# show ip route vrf mytenant:vrf1 10.1.1.1
IP Route Table for VRF "mytenant:vrf1"
'*' denotes best ucast next-hop
'**' denotes best mcast next-hop
'[x/y]' denotes [preference/metric]
'%<string>' in via output denotes VRF <string>
10.1.1.1/32, ubest/mbest: 1/0, attached, pervasive
*via 10.1.1.1, vlan3, [1/0], 45w317d, local, local
However, if I then check the same route from leaf switch 5 which is not configured with this BD my next hop is a VTEP pool IP. I would have expected this next hop address to be the VTEP address of leaf switch 10 which owns the BD but it is unexpectedly a spine switch? Now, obviously when I check the routing table on the spine switches, they are unaware of the tenant-level VRFs and I only get the overlay VRF routing table containing the VTEP nodes.
leaf-switch-5# show ip route vrf mytenant:vrf1 10.1.1.1
IP Route Table for VRF "mytenant:vrf1"
'*' denotes best ucast next-hop
'**' denotes best mcast next-hop
'[x/y]' denotes [preference/metric]
'%<string>' in via output denotes VRF <string>
10.1.1.0/24, ubest/mbest: 1/0, attached, direct, pervasive
*via 1.1.1.1%overlay-1, [1/0], 14w102d, static
recursive next hop: 1.1.1.1/32%overlay-1
Is anyone aware of an NX-OS command that can tell me which leaf switches have the local/directly-connected L3 bridge domain network from the perspective of leaf switches where the BD is not locally connected?
