Cisco ASR 9000 Series Configuration Guidelines

Anycast VXLAN L2 Gateway
Anycast VXLAN L2 gateway requires multihoming gateway nodes to use a common VTEP IP address.
Gateway nodes in the same DC advertise the common VTEP IP in all EVPN routes from type 2 to type 5.
Nexus 9000 leaf nodes in the DC considers only one border leaf VTEP located on multiple physical gateway
nodes. Each Nexus 9000 router forwards traffic to the nearest gateway node through IGP routing.
Among multihoming DCI gateway nodes, an EVPN Ethernet segment is created on VXLAN facing NVE
interface. One of the nodes is elected as DF for a tenant VNI. The DF node floods BUM traffic from WAN
to DC. All DCI PE nodes discover each other through EVPN inclusive multicast routes advertised through
WAN.
Consider a topology of anycast VXLAN L2 gateway between DC and WAN. In this topology, both ASR
9000 PE nodes share the same source VTEP IP address (VTEP5). Nexus 9000 router runs in vPC mode. ASR
9000 nodes advertise inclusive multicast routes using VTEP5 IP address. Nexus 9000 leaf nodes discover
only one VTEP hosted by two ASR 9000 nodes.
Figure 82: Anycast VXLAN L2 Gateway
L2VPN and Ethernet Services Configuration Guide for Cisco ASR 9000 Series Routers, IOS XR Release 6.3.x
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EVPN Features
Anycast VXLAN L2 Gateway

Cisco ASR 9000 Series Specifications

General

Series	ASR 9000
Category	Network Router
Modular Design	Yes
Redundancy	Yes (Hardware and Software)
Operating System	Cisco IOS XR
Interfaces/Ports	10G, 40G, 100G, 400G Ethernet
Expansion Slots	Varies by model
Routing Protocol	BGP, OSPF, IS-IS, EIGRP
Management	CLI, SNMP, NETCONF
Power Supply	Redundant
Port Density	Varies by model
Power Supply Options	AC, DC
Memory	Varies by model
Storage	Varies by model
Dimensions	Varies by model
Weight	Varies by model