Overview
VxLAN EVPN Multi-homing features enables to connect a CE/Host node to two VTEPs with all-active redundancy mode. A redundant VTEP device can provide network service to the customer site as soon as a failure is detected. The failure can be link or node failure. If one VTEP goes down, other will forward the entire traffic.
Below are Multi-homing concepts:
• Ethernet Segment: Set of links which connect host/CE to two active-active multi-homed VTEP (only two VTEPs are supported) which appears as LACP link for host.
• Ethernet Segment Identifier: Ethernet Segment Identifier (ESI) which is a 10 octet-value, which can be configured in two ways, system MAC is configured as esi in case of Dynamic LAG and 10-octet ESI format configuration is used on physical interface ES.
• Ethernet Segment Route (ES route): When a multi-homed CE is configured as an VXLAN access-port, Ethernet segment route is sent. The main purpose of this route is to discover other VTEPs which share the ES and to perform DF election.
• Ethernet A-D route per ESI: This route is used for Fast Convergence and Split Horizon.
• Ethernet A-D route per EVI: This route is used for load sharing between DF and NON-DF by the remote VTEPs
Last modified date: 08/29/2023