What are two ways to verify that gateways have successfully registered with a gatekeeper?

Use the show gatekeeper endpoints command on the gatekeeper or the show gateway command on the gateway.

Why is it necessary to configure technology prefixes when implementing gatekeepers on a voice network?

Typically, a called number matches a zone prefix, not a registered E.164 address. In this case, if a technology prefix is not also matched, the call is rejected.

What do you need to do to the gatekeeper configuration to provide dynamic prefix registration support?

Add the rrq dynamic-prefixes-accept command to the gatekeeper configuration.

How much bandwidth does the gatekeeper count for each call using a G.729 codec? For a G.711 codec?

The gatekeeper counts each G.729 as 16 Kb and each G.711 call as 128 Kb.

How can you provide redundancy on a CallManager H.225 gatekeeper-controlled trunk?

You can provide redundancy on the trunk by assigning up to three subscriber servers to the CallManager redundancy group that is associated with the device pool assigned to the trunk.

How is state information shared between gatekeepers in a gatekeeper cluster?

State information is updated to all members of a gatekeeper cluster using GUP messages.

What three commands can provide detailed information about the status of a gatekeeper cluster?

The show gatekeeper status cluster, show gatekeeper cluster, and show gatekeeper zone cluster commands are available to verify the setup and status of the cluster.

Which undocumented trace command can you use to show the decision tree steps that the gatekeeper takes as it processes an ARQ message?

You can use the debug gatekeeper main 5 trace command to show the decision tree steps that the gatekeeper takes as it processes an ARQ message.