Evpn Vxlan Layer 2 Data Center Interconnect Gateway; All-Active Multi Homing With Anycast Vtep Ip Address - Cisco ASR 9000 Series Configuration Manuallines

EVPN VXLAN Layer 2 Data Center Interconnect Gateway

Multi-paths Resolved : True <--- aliasing to two remote PE with All-Active load balancing
Static : No
Local Ethernet Segment : N/A
Remote Ethernet Segment : 0100.211b.fce5.df00.0b00
Local Sequence Number : N/A
Remote Sequence Number : 0
Local Encapsulation : N/A
Remote Encapsulation : MPLS
Verify the BGP routes associated with EVPN with bridge-domain filter.
RP/0/RSP0/CPU0:router# show bgp l2vpn evpn bridge-domain EVPN_2001 route-type 2
*> [2][0][48][00bb.2001.0001][0]/104
*>i[2][0][48][00a9.2002.00be][0]/104
* i 30.30.30.30 100 0 i
EVPN VXLAN Layer 2 Data Center Interconnect Gateway
The Cisco ASR 9000 Series Routers serve as a Data Center Interconnect (DCI) Layer 2 gateway to provide
Layer 2 connectivity between EVPN VXLAN based data centers, over a MPLS-based L2VPN network. The
data centers are connected through the intermediate service provider network. The EVPN VXLAN enabled
data centers use EVPN control plane for distributing Layer 2 forwarding information from one data center to
another data center. This feature provides redundancy, resiliency, and ease of provisioning.
The EVPN VXLAN layer 2 DCI gateway feature supports these functions:
• VXLAN access for single homing
• VXLAN access for all-active multi homing with anycast VXLAN Terminal EndPoint (VTEP) IP address
• VXLAN access for all-active multi homing with unique VTEP IP address
• EVPN ESI Multipath with VXLAN encapsulation

All-Active Multi Homing with Anycast VTEP IP Address

The DCIs use the same anycast VTEP IP address for all-active multi-homing with anycast VTEP IP address.
Consider the following topology where Top of Racks (ToRs) are connected to the DCIs using multiple paths:
The traffic passes from ToRs to the DCIs through multiple physical paths and uses anycast IP address for
load balancing. DCI1 and DCI2 advertise MAC routes to ToRs using the same anycast IP address as that of
the next-hop. So, the ToR sends the traffic to the same anycast IP address of the DCIs, and uses IGP ECMP
for load balancing. A virtual PortChannel (vPC) allows ToR1 and ToR2 to have the same IP configuration.
ToR1 and ToR2 advertise MAC routes to DCIs using the same IP address as that of the next-hop. So, the DCI
sends the traffic to the same IP address of the ToRs, and uses IGP ECMP for load balancing. The DCI sends
the traffic to the remote data center through MPLS forwarding.
L2VPN and Ethernet Services Configuration Guide for Cisco ASR 9000 Series Routers, IOS XR Release 6.3.x
500
0 i <------ locally learnt MAC
0.0.0.0
10.10.10.10 100 0 i <----- remotely learnt MAC
EVPN Features