Adding Redundancy to Gatekeeper Designs
Phone 1
CallManager
gk3
gk2
gk1
gw2
gw1
Internal Data Network
PSTN
For technology prefix 1#, gk3 can be configured to prefer one gatekeeper
(sequential) or to request call placement to both, using whichever gatekeeper
responds first (blast). In sequential mode, gatekeepers will be tried in the order
they are listed in the gw-type-prefix command.
For further redundancy, you can configure the two gateways to register with
either gatekeeper.The gateways attempt to register with gatekeepers in the order
in which they are configured. If their registration fails, they will try the second
gatekeeper, and so on.You could configure gw1 to register with gk1, then gk2.
You could configure gw2 to register with gk2, then gk1.This would allow both
gateways to be operational even if one of the gatekeepers failed. In this approach,
it may be simpler to place gk1, gk2, gw1, and gw2 in the same zone.