VSX: MCLAG Link HA
This document showcases a typical MCLAG link failover scenario, where one of the links goes to the edge device, whether that is the connected switch or server.
In the following image, a typical traffic pattern coming off from MCLAG connected device is shown. The traffic is going north to south and ISL is not carrying any traffic. The only time ISL will carry traffic is if one of the links to downstream devices is down.
The network is now fully configured up.
If an administrator decides to test HA functionality by pulling MCLAG link off
from Spine-02 and the bottom switch, the following things are expected:
- A small percentage of packets will be dropped when disconnecting the cable where traffic is flowing. A sub-second value is expected during this event.
- When connecting back the cable, the hashing needs to be recalculated and some packets may be dropped during this event as well. A sub-second value is expected during this event.