• Author : Chris Hydon

 
 

EVPN Single-active Multihoming & Preference-based DF Election

Description Single-active multihoming Multihoming in EVPN allows a single customer edge (CE) to connect to multiple provider edges (PE or tunnel endpoint). The default mode of operation is all-active, in which the CE connects using link aggregation and can send traffic to either PE by hashing (or any other means) and expect the traffic to be successfully delivered. Introduced in EOS 4.26.0F for VXLAN and 4.27.0F for MPLS, single-active is an alternative mode of operation in which only one PE per VLAN per ethernet segment accepts traffic. Any other PE in the ethernet segment will drop all inbound packets, effectively...
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EVPN VXLAN All-Active Multihoming

Description Ethernet VPN (EVPN) networks normally require some measure of redundancy to reduce or eliminate the impact of outages and maintenance. RFC7432 [1] describes four types of route to be exchanged through EVPN, with a built-in multihoming mechanism for redundancy. Prior to EOS 4.22.0F, MLAG is available as a redundancy option for EVPN with VXLAN, but not multihoming. EVPN multihoming is a multi-vendor standards-based redundancy solution that does not require a dedicated peer link and allows for more flexible configurations than MLAG, supporting peering on a per interface level rather than a per device level. It also supports a mass...
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