The following figure illustrates a basic LVTEP topology for the data plane, with cluster nodes supporting remote peers and client end points (CEPs) and cluster client end points (CCEPs).
The following tables describe the supporting packet formats.
|
Outer MAC header |
Outer IP header |
UDP header |
VxLAN header |
Original L2 frame |
The preceding packet format is used between the remote peers for both unicast and BUM traffic.
|
Outer MAC header |
Outer IP header |
UDP header |
VxLAN header |
Original L2 frame |
The preceding packet format is used between the cluster peers for unicast traffic.
The above packet format is used between the cluster peers for BUM traffic when the traffic is received on the CCEP Interface. This applies to both the Layer 2 CCEP interface or the tunnel CCEP interface.
For a BGP EVPN deployment, the MAC addresses learned on the VxLAN tunnel are moved to point to the ICL tunnel. Traffic destined to this MAC is sent over the ICL tunnel and forwarded from the MCT peer node.