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SONiC EVPN Multi-homing
This is the third post in series focused on SONiC-Network Operating System and its applications in data center networking
Summary of posts:
- SONiC Architecture
- EVPN-VxLAN, Asymmetric/Symmetric IRB
- EVPN Multi-homing
- MC-LAG, LACP Configurations
- SONiC configurations & interfaces
- Static Anycast gateway configurations
We will cover three mechanism to achieve Multi-homing:
- Split Horizon
- Aliasing
- Fast Convergence
Single-homing refers to a setup where one device is connected to only one other device. In contrast, multi-homing involves a single device being connected to multiple other devices.
In EVPN multihoming, Leaf1 and Leaf2 operate as a single logical switch and form a port channel with CE1. The leaf switches exchange and synchronize EVPN multihoming information using BGP control packets, which are transmitted through the underlay network connecting the spine and leaf switches.
EVPN multihoming uses the EVPN control plane to synchronize information. In a CLOS topology, leaf switches typically serve as PE (Provider Edge) devices, acting as VTEPs (Virtual Tunnel Endpoints). These…
