Cisco Systems D14659.03 Displaying the built-in gatekeeper registration list

Displaying the built-in gatekeeper registration list

Cisco TelePresence ISDN Gateway 2.1 Online help (Printable format) 44 of 135

Displaying the built-in gatekeeper registration list

The Cisco TelePresence ISDN Gateway contains a built-in gatek eeper with w hich dev ices can regis ter

multiple IDs. IDs can be numbers, H.323 IDs (e.g. Fredsendp oint) or prefixes.

Up to 25 devices can be registered without a feature key. Feature k eys can be purchased to increase this

number.

Note: The ISDN Gateway can register with its own built-in gatekeeper. The ISDN Gatewa y then counts

as one registered device. See Configuring H.323 gatek eeper settings.

To start the gatekeeper:

1. Go to Network > Services and select H.323 gatekeeper to op en a port for the gatekeeper. (On

the ISDN Gateway, ports are not open by default for sec urity reasons.)

2. Go to Gatekeeper, select Enabled in the Status field and click Apply chan ges. If you attempt to

enable the built-in gatekeeper without opening the port, an error m essage is displayed.

You can optionally configure the built-in gatekeeper with up to t wo neighboring gatekeepers. This means

that if the built-in gatekeeper receives a request (known as a n Admission Request or ARQ) to resolve an

ID to an IP address and that ID is not currently register ed w ith it then it will for ward that reques t to its

neighbor gatekeeper(s), as a Location Request (LRQ). T he built-in gatekeeper will then use the

information received from the neighbor(s) to reply to the or iginal request.

You can also configure the behavior of the built-in gatek eeper on receipt of LRQs from another

gatekeeper. It can:

• send LRQs regarding unknown IDs to its neighbor(s)

• reply to LRQs from other gatekeepers

• accept LCFs (Locations Confirms) from non-neighboring gatek eepers

Refer to this table for assistance when configuring the bui lt-in gatekeeper:

Field

Field description Usage tips

Status

Enables or disables the built-in gatekeeper.

To use the built-in gatekeeper, you

must enable it here.

Neighbor

gatekeeper

1 and 2

Enter the IP address(es), or hostname(s) (or

<host>:<port number> to specify a port other

than the default of 1719 on the neighboring

gatekeeper), of the neighboring gatekeeper(s).

These are the gatekeepers to which

the built-in gatekeeper will send an

LRQ if it has received an ARQ to

resolve an ID which it does not