# Anycast-Only Gateways in EVPN Asymmetric IRB

DevFeed: [Anycast-Only Gateways in EVPN Asymmetric IRB](<https://devfeed.tech/articles/anycast-only-gateways-in-evpn-asymmetric-irb-11395.md>)

Original publisher: [Read original article](<https://blog.ipspace.net/2026/06/arp-issues-evpn-anycast-only/>)

Published: 2026-06-24T06:19:00Z

Content type: article

Language: en

Sources: [ipSpace.net blog](<https://devfeed.tech/sources/ipspace-net-blog.md>)

Topics: [evpn](<https://devfeed.tech/topics/evpn.md>), [VXLAN](<https://devfeed.tech/topics/vxlan.md>)

Tags: [arp](<https://devfeed.tech/tags/arp.md>), [evpn](<https://devfeed.tech/tags/evpn.md>), [vxlan](<https://devfeed.tech/tags/vxlan.md>)

## AI overview

This article examines ARP resolution in EVPN asymmetric IRB environments where PE devices use only a shared anycast MAC/IP address. It describes how silent hosts can cause communication to stall because an ARP reply may be intercepted, and explains how Arista EOS accepts the unsolicited reply to create a MAC/IP route and complete forwarding.

## Source excerpt

In the previous blog post, I described how ARP works in an EVPN asymmetric IRB environment where the PE devices share an anycast MAC/IP address in addition to a unicast MAC/IP address. Today, let's see how well things work if the PE devices have only the anycast MAC/IP address: Packet forwarding in an EVPN asymmetric IRB design using only anycast gateways Read more ...