OTV over VXLAN
The senario I have is running otv over CSR1000V in vcloud director environment. Basically I depolyed two csr1000v ova in the same Org VDC, then connected them (both interface gigabitethernet 2) in the same network (vxlan). Pinging is fine as they are on the same network with ip address in the same subnet.
However, when I used this int g2 as join-interface to setup otv, the AED capable is "No, overlay DIS not elected".
Something I would like to point out :
1. I am using unicast-only in this senario, one of those 2 CSR1000v is adj-server.
2. mtu size is jumbo, so don't worry about the mtu 1542 df-bit prerequisite.
3. I have another similar lab in only one esxi host, which means there is no vxlan at all. Exactly the same configs work perfectly.
BTW, I have setup a capature on the csr1000v, and monitor it for a while. However, there is no UDP 8472 packet (ISIS Hello) bidirectionally at all.
So it's quite confusing me, as the csr1000v should have no idea about the vxlan underlying, then why vxlan would affect the isis hello packet generating and receiving?
Thanks a lot!