The table below outlines what happens when one of the systems involved in an active/active link fails, where the system that fails is system A and the system that remains healthy is system B.
Step | What you do | What happens |
---|---|---|
System A fails |
||
1 |
On system B, fail over the link |
If DNS failover is enabled, system B broadcasts new DNS configuration |
2 |
If DNS failover is disabled, direct clients to write only to system B |
|
System A comes back online |
||
3 |
If system A has been rebuilt: •On system A, upload the replication SSL server certificate from system B •On system B, upload the replication SSL server certificate from system A |
|
4 |
On system B, update the link configuration as needed |
|
5 |
If the link is broken, on system B, send a request to restore the link |
Replication link is recreated |
6 |
On system B, fail back the link |
System A and system B broadcast original DNS configurations; replication restarts in both directions on the link |
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