WAAS - behavior if central manager is down

mfingers · ‎08-03-2009

We would like to move our 4.1.3 central manager to a different city. I understand that the waas devices dependent on the CM continue to operate if the CM is down, but if a waas device reboots while the CM is down, will it continue to operate?

dstolt · ‎08-03-2009

The easy way to do this would be to add a Standby CM and fail over to it while the Primary is offline during the move.

However, if a box is rebooted while a single CM is offline, it should be okay unless you have disk encryption enabled. Then it won't be able to access the disk cache until it can reach a CM during the boot cycle for the encryption key.

Also, another thing to consider: Are you using a dns host name (waascm.cisco.com) in your WAE configs for the "central manager address" or are you using an IP address that will be changing? If you are using an IP address and are NOT using the Standby CM failover technique, then you have to change it on the WAEs manually when the CM comes up with a new IP address.

Hope that helps,

Dan

mfingers · ‎08-07-2009

Thanks Dan! We don't have a standyby CM, so that isn't an option for us. We don't have disk encryption on, so we should be ok. Good tip on the dns host name instead of the ip.

Regards,

Mike