Objectives
The simulator ticks each one as soon as the network meets it.
On EA and EB enable feature otv, set otv site-vlan 99, and give each site its own otv site-identifier (0x1 on EA, 0x2 on EB).
On both, create interface Overlay1 with otv join-interface Ethernet1/1 and otv extend-vlan 10, and bring it up (no shutdown).
Make EA the adjacency server (otv adjacency-server unicast-only) and point EB at it (otv use-adjacency-server 10.1.1.2 unicast-only).
show otv adjacency on EA lists EB as UP.
Ping PCB (192.168.10.20) from PCA.
Before you start
The join interface is a routed port with an address; OTV encapsulates the extended VLAN in IP and sends it across the core. Without multicast in the core, one edge acts as the adjacency server that tells every edge about the others. The site VLAN is never extended.
Concept
OTV: extending a VLAN between data centers
Overlay Transport Virtualization carries chosen VLANs from one site to another across any routed network. An edge device in each site learns the MAC addresses of its own site, advertises them to the other edges, and sends frames for remote MACs inside IP (a MAC-in-IP overlay). Spanning tree and unknown-unicast flooding stay inside each site, so the sites remain separate failure domains.
