Route Types
These EVPN route types are supported:
• Route Type 1: Ethernet Auto-Discovery (AD) Route
The Ethernet (AD) routes are advertised on per EVI and per ESI basis. These routes are sent per ES. They carry the list of EVIs that belong to the ES.
This route is advertised when multihomed CEs already exist.
• Route Type 2: MAC/IP Advertisement Route
The host's IP and MAC addresses are advertised to the peers within NLRI. The control plane learning of MAC addresses reduces unknown unicast flooding.
• Route Type 3: Inclusive Multicast Ethernet Tag Route
This route establishes the connection for broadcast, unknown unicast, and multicast (BUM) traffic from a source PE to a remote PE.
This route is advertised on per VLAN and per ESI basis.
• Route Type 4: Ethernet Segment Route
Ethernet segment routes enable to connect a CE device to two or PE devices.
Ethernet segment routes enable the discovery of connected PE devices that are connected to the same Ethernet segment.
• Route Type 5: IP prefix Route
An IP prefix route provides encoding for inter-subnet forwarding. In the control plane, EVPN Type 5 routes are used to advertise IP prefixes for inter-subnet connectivity across data centers.
In EVPN-VPWS the auto-discovery of peer PE nodes is done with the pair of Ethernet A-D routes. Inclusive Multicast route does not have participation on auto-discovery unlike ELAN-EVPN VPLS. Since there is no MAC-advertisement, MAC-IP route is not applicable.
Note:
1. RD value should be unique for multihoming nodes.
2. ANYCAST gateway MAC is mandatory on multihoming nodes.
3. "rewrite pop" is mandatory on access interface.
4. arp-nd refresh timer needs to be configured to avoid ARP table getting clear after ARP timeout.
Last modified date: 10/17/2023