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Implementing H.323 Gatekeepers

Configuring BasicGatekeeperFunctionality

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Gatekeeper Configuration Steps

1. Configure local and remote zones on the gatekeeper.

2. Configure zone prefixes.

3. Configure technology prefixes.

4. Configure gateways to use H.323 gatekeepers.5. Configure dial peers.

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Single GatekeeperMultizoneConfiguration Scenario

Gatekeeper

Phone1-12001

Phone1-22002

San Jose

Phone2-13001

Phone2-23002

Houston

SanJose(H.323)

Houston(H.323)

WAN

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Configuring Zones

Gatekeeper10.1.1.10

San Jose

Houston

gatekeeper

zone local SanJose cisco.com 10.1.1.10

zone local Houston cisco.com enable-intrazone

zone remote Austin cisco.com 10.1.1.12

no shutdown

WAN

Phone1-12001

Phone1-22002

Phone2-13001

Phone2-23002

SanJose Houston

Austin

Gatekeeper

10.1.1.12

GK1

GK2

GK 1 = Gatekeeper 1GK 2 = Gatekeeper 2

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Configuring Zone Prefixes

Gatekeeper

Phone1-12001

Phone1-22002

San Jose

SanJose1

WAN

gatekeeper

zone local SanJose cisco.com 10.1.1.10

zone local Houston cisco.com

zone prefix SanJose 2... gw-priority 5 SanJose1

zone prefix SanJose 2... gw-priority 10 SanJose2

no shutdown

SanJose2

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Configuring Technology Prefixes

Gatekeeper

Phone1-12001

Phone1-22002

San Jose

Phone2-13001

Phone2-23002

Houston

San Jose Houston192.168.1.1

WAN

gatekeeperzone local SanJose cisco.com 10.1.1.10zone local Houston cisco.comzone prefix SanJose 2... gw-priority 10 SanJosezone prefix Houston 3... gw-priority 10 Houstongw-type-prefix 99#* gw ipaddr 192.168.1.1 1720gw-type-prefix 1#* default-technologyno shutdown

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Registering Gateways

Gateway configuration steps:

1. Enable the gateway process.

2. Configure interface commands.

3. Configure dial peers.

4. Optional: Prevent ephone and dial peer registration at thegatekeeper.

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Gatekeeper(GK1)192.168.1.15

Phone1-12001 Phone1-22002

San Jose

Phone2-23002

Houston

SanJose(H.323)

Houston(H.323)

192.168.1.3

Fa0/1

Configuring Gateways to Use H.323Gatekeepers

gateway!interface Loopback 0ip address 192.168.1.3 255.255.255.0h323-gateway voip interfaceh323-gateway voip bind srcaddr 192.168.1.3h323-gateway voip id GK1 ipaddr 192.168.1.15 1719 priority 1

h323-gateway voip h323-id Houstonh323-gateway voip tech-prefix 1#

WAN

CUCME = Cisco UnifiedCommunications Manager

Express Phone2-13001

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Configuring a Dial Peer

Gatekeeper

Phone1-12001

Phone1-22002

San Jose

Phone2-23002

Houston

SanJose(H.323)

Houston(H.323)

WANFa0/1

Phone2-13001

Optional

gateway

!

dial-peer voice 1 voip

destination pattern 2...

tech-prefix 1#

session target ras

!

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Verifying Gatekeeper Functionality

Show commands:

show gatekeepergw-type-prefix

show gatekeeper status

show gatekeeper zone prefix

show gatekeeper calls

show gatekeeper endpoints

show gatekeeper zone status

Debug commands:

debug h225 {asn1 | events}

debug h245 {asn1 | events}

debug proxy h323 statistics debug ras

debug gate main [5] [10]

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Verifying Gatekeeper Functionality(Cont.)

HQ-1# show gatekeeper status

Gatekeeper State: UP

Load Balancing: DISABLED

Flow Control: DISABLED

Zone Name: HQ

Zone Name: BR

Accounting: DISABLED

Endpoint Throttling: DISABLED

Security: DISABLEDMaximum Remote Bandwidth:

unlimited

Current Remote Bandwidth: 0 kbps

Current Remote Bandwidth (w/ Alt GKs): 0 kbps

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Verifying Gatekeeper Functionality(Cont.)

HQ-1# show gatekeeper zone prefix

ZONE PREFIX TABLE

=================

GK-NAME E164-PREFIX------- -----------

HQ 1...

BR 2...

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Verifying Gatekeeper Functionality(Cont.)

HQ-1# show gatekeeper gw-type-prefix

GATEWAY TYPE PREFIX TABLE

=========================

Prefix: 2#*

Zone HQ master gateway list:

10.1.250.102:1720 BR

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Verifying Gatekeeper Functionality(Cont.)

HQ-1# show gatekeeper endpoints

GATEKEEPER ENDPOINT REGISTRATION

================================

CallSignalAddr Port RASSignalAddr Port Zone Name Type Flags

--------------- ----- --------------- ----- --------- ---- -----

10.1.250.101 1720 10.1.250.101 58963 HQ H323-GW

H323-ID: GW-A1

E164-ID: 1101

E164-ID: 1102

Voice Capacity Max.= Avail.= Current.= 0

10.1.250.102 1720 10.1.250.102 58306 BR VOIP-GW

H323-ID: GW-A2

Voice Capacity Max.= Avail.= Current.= 0Total number of active registrations = 2

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Summary (Cont.)

Cisco IOS routers can be registered as gateways withgatekeepers.

The VoIP dial peer determines how to direct calls that originatefrom a local voice port into the VoIP cloud to the RAS session

target. Several show and debug commands exist for troubleshooting

and verifying gatekeeper configuration.

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