A city extends overlay reachability by establishing EVPN route exchange between border gateways at each remote site. What does that session design primarily provide for EVPN-VXLAN DCI?
Select an answer to reveal the explanation.
Short Explanation
DCI EVPN is the phone call between site borders that shares who lives where in the overlay. MBGP EVPN sessions carry that membership and routing news. Without the call, the VXLAN tunnels have no trustworthy address book.
Full Explanation
EVPN-VXLAN DCI relies on Multiprotocol BGP EVPN between DCI gateways (or site borders) to advertise MAC/IP and IP-prefix routes across sites. Underlay IGP alone does not replace EVPN signaling, EVPN sessions do not remove the need for VXLAN data plane, and underlay EBGP peers are not automatically redefined as Type-5-only EVPN neighbors.