Anycast MH

EVPN VXLAN Anycast Multi-Homing (MH) leverages Anycast VXLAN Termination Endpoints (VTEPs) shared by the multi-homed leaf routers as defined in draft-rabnag-bess-evpn-anycast-aliasing (Anycast Multi-Homing for EVPN).

The following figure shows a leaf–spine fabric where Leaf1 and Leaf2 act as egress leaf nodes that multihome Server-1 and Server-2, while Leaf3 node serves as the ingress leaf forwarding traffic toward them. This figure serves as a reference point for all subsequent sections throughout this chapter.

Figure 1. EVPN Anycast MH
  • The Egress leaf is the system attached to the Ethernet Segment (ES) working in the Anycast MH mode.
  • The ingress leaf is the system that performs the Ethernet Aliasing function (Overlay ECMP).

Supported platforms

Anycast Multi-Homing is supported on the following platforms:

  • 7220 IXR-Dx (ingress and egress function)
  • 7250 IXR Gen 2c+ (ingress leaf function)
  • 7250 IXR Gen 3 (ingress leaf function)
  • 7220 IXR-H5 (ingress and egress function)