Recommended network configuration for keepalive
Directly connect the keepalive link, as shown in the following figure. Avoid keepalive communication over the ISL circuits.

Do not configure keepalive to go through the VSX LAG uplinks, as shown in the following image. This scenario is not supported because:
Not supported configuration for keepalive
VSX LAG on the secondary will clear because split detection.
Keepalive communication will stop between the VSX switches.
