Multihoming in a BGP EVPN VXLAN Fabric Configuration Guide, Cisco IOS XE 26.x.x and Later

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Multihoming in a BGP EVPN VXLAN Fabric Configuration Guide, Cisco IOS XE 26.x.x and Later

Restrictions for single-active mode

Updated: April 10, 2026

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Overview

Outlines the restrictions that apply to single-active mode.

Consider these restrictions when implementing multihoming in BGP EVPN VXLAN networks:

  • Multihoming in single-active redundancy mode supports only dual-homing, which allows two nodes within a redundancy group.

  • Cross-linking between host or access devices and VTEPs is not supported for a dual-homed network.

  • A dual-homed network needs internal redundancy to avoid a network split.

  • Provision and operational state of EVPN instances must be consistent on both dual-homed VTEPs. Inconsistencies in configuration or operational state of EVPN instances between the VTEPs leads to traffic blackholing.

  • A Cisco Catalyst 9000 Series switch does not support Ethernet Segment configuration if a Leaf node is also a Spine and a BGP Route Reflector.

  • EVPN multihoming is not supported on Cisco Catalyst 9500X Series Switches and Cisco Catalyst 9600-Sup2.

  • Combined mode with StackWise Virtual and EVPN Multihoming is not supported in Cisco Catalyst 9400, 9500, and 9600 Series Switches.

  • EVPN multihoming for non-fabric and fabric networks with native VXLANv6 is not supported.

  • EVPN multihoming fabric networks in centralized gateway role is not supported.

  • EVPN multihoming ISSU from a previous release to Cisco IOS XE 17.18.2 is not supported on Cisco Catalyst 9400 and 9600 Series Switches with redundant supervisors.

  • Anycast gateway (global or VRF-enabled) SVI with any First Hop Redundancy Protocol (FHRP) protocol is not supported.