All-Active Multi Homing With Unique Vtep Ip Address; Evpn Esi Multipath For Vxlan - Evi Based Load Balancing - Cisco ASR 9000 Series Configuration Manuallines
L2vpn and ethernet services configuration guide
Hide thumbs
Also See for ASR 9000 Series:
- Command reference manual (1138 pages) ,
- Routing configuration manual (702 pages) ,
- Reference manual (696 pages)
Table of Contents
Advertisement
EVPN Features
Figure 75: All-Active Multi Homing with Anycast VTEP IP Address
All-Active Multi Homing with Unique VTEP IP Address
The DCIs do not share anycast VTEP IP address for all-active multi homing with unique VTEP IP address.
Each DCI uses a unique VTEP IP address. Consider the following topology where ToR receives the MAC
routes from DCIs. Each MAC route has a unique next-hop. Because both DCI1 and DCI2 advertise routes
for the same MAC with different next-hops, ToR has two equal cost next-hops for the same MAC. When ToR
sends the traffic to the MAC, ToR load balances the traffic on both next-hops.
Figure 76: All-Active Multi Homing with Unique VTEP IP Address
EVPN ESI Multipath for VxLAN - EVI Based Load balancing
The EVPN Ethernet Segment Identifier (ESI) Multipath feature supports multi-path traffic to active-active
dual-homed TORs and DCIs to provide redundant connectivity within the data center. ESI multi paths are
discovered by the ASR9k DCI router through EVPN signalling. The path selection is based on Ethernet
Segment Identifier (ESI) and EVPN instance (EVI). To resolve paths for MAC routes received, use Ethernet
A-D routes per ES ( ES-EAD) and Ethernet A-D routes per EVI (EVI-EAD) as specified in RFC 7432.
Consider the following topology where DCIs receive the MAC routes from ToRs and each MAC route has a
next-hop for each ToR. Similarly, DCIs advertise MAC routes with different next-hops to ToRs. When DCI
sends the traffic to VM, which is behind a pair of ToRs, there are two paths (ToR) for every MAC. The DCI
load balances the traffic on the two paths. The selection of path is based on EVI. For example, DCI1 and
DCI2 selects ToR1 for all traffic destined to the MAC address learnt on EVI1; DCI1 and DCI2 selects ToR2
for all traffic destined to the MAC address learnt on EVI2.
L2VPN and Ethernet Services Configuration Guide for Cisco ASR 9000 Series Routers, IOS XR Release 6.3.x
All-Active Multi Homing with Unique VTEP IP Address
501
Advertisement
Table of Contents
