Failure scenarios and split recovery

Failure scenarios	Result with split recovery off	Result with split recovery on (default)
Keepalive is down and ISL is up. This scenario is shown with label "b" in the figure.	No impact, except for the loss of the split detection.	No impact, except for the loss of the split detection.
ISL is down, but keepalive is up. This scenario is shown with label "a" in the figure.	Secondary VSX switch brings down VSX LAG member ports.	Secondary VSX switch brings down VSX LAG member ports.
ISL is down, but keepalive is up, as shown with label "a" in the figure. Then, after sometime, keepalive also goes down, as shown with label b.	Secondary VSX switch brings down VSX LAG member ports. Then, the secondary VSX LAGs stay down.	Label a: The secondary VSX switch brings down VSX LAG member ports. Label b: The secondary VSX switch restores VSX LAG member ports.
At the same time, ISL goes down and keepalive goes down, as shown with label "a" and "b" in the following figure. Then, keepalive is restored, as shown with label b.	Label a and b: All VSX LAG ports stay up. Label b: Then, the secondary VSX switch brings down the VSX LAG member ports.	Label a and b: All VSX LAG ports stay up. Label b: Then, the secondary VSX switch brings down the VSX LAG member ports.