Cisco ASR 9000 Series Configuration Guidelines

Figure 77: EVPN ESI Multipath
EVPN ESI Multipath for VxLAN - Flow-based Load Balancing
The EVPN Ethernet Segment Identifier (ESI) Multipath for VxLAN feature supports flow-based load balancing
to forward the traffic between Top of Racks (ToRs) and Data Center Interconnect (DCI), and between the
source and remote DCIs. A flow is identified either by the source and destination IP address of the traffic, or
the source and destination MAC address of the traffic.
In Release 6.2.1, the default load balancing mode is flow-based. You can change the load balancing mode
based on per EVI. See Configure Network Virtualization Endpoint (NVE) Interface, on page 508 task to change
the load balancing mode based on per EVI.
In Release 6.1.2, only per EVI-based load balancing was supported. Starting from Release 6.2.1, both flow-based
load balancing and per EVI based load balancing are supported. The following table shows the support matrix:
Table 7: Support Matrix for EVPN ESI Multipath for VxLAN Load Balancing
Release 6.2.1Release 6.1.2Line Card
Supports only per EVI-based load
balancing
Supports only per EVI-based load
balancing
ASR 9000 Enhanced Ethernet Line
Card
Supports both flow-based and per
EVI-based load balancing
Supports only per EVI-based load
balancing
A9K-8x100G-LB-SE,
A9K-8x100G-LB-TR,
A9K-8X100GE-SE,
A9K-8X100GE-TR,
A9K-4X100GE-SE,
A9K-4X100GE-TR,
A9K-400G-DWDM-TR,
A9K-MOD400-SE,
A9K-MOD400-TR,
A9K-MOD200-SE,
A9K-MOD200-SE
The unknown unicast flooding on traffic received from VxLAN segment is supported. In Release 6.2.1, by
default, the unknown unicast flooding on traffic received from VxLAN segment is enabled. To disable the
unknown unicast flooding, use the suppress-unknown-unicast-flooding command. See Configure Network
Virtualization Endpoint (NVE) Interface, on page 508 task to disable unknown unicast flooding on traffic
received from VxLAN segment.
In Release 6.1.2, by default, the unknown unicast flooding on traffic received from VxLAN segment is disabled.
L2VPN and Ethernet Services Configuration Guide for Cisco ASR 9000 Series Routers, IOS XR Release 6.3.x
502
EVPN Features
EVPN ESI Multipath for VxLAN - Flow-based Load Balancing

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