© 2006 Cisco Systems, Inc. All rights reserved. GWGK v Gatekeeper Deployments Implementing Advanced Gatekeeper Functionality

© 2006 Cisco Systems, Inc. All rights reserved. GWGK v Multiple Gatekeepers Phone Phone Zone SanJose Zone Chicago GK2 Phone Phone Dials 3002 Gateway forwards call setup to gatekeeper Forwards call setup to Phone2-2 GK1 Forwards call setup to gatekeeper 2 Forwards call setup to gateway GK=Gatekeeper

© 2006 Cisco Systems, Inc. All rights reserved. GWGK v Multiple Gatekeepers Characteristics Each local zone can be managed by only one gatekeeper. Call setups are forwarded from one gatekeeper to another. Each remote zone where you want to reach an endpoint must be configured on the local gatekeeper. Bandwidth management (CAC) can be configured between zones, from zone X to any other zone.

© 2006 Cisco Systems, Inc. All rights reserved. GWGK v Interconnecting Gatekeepers Multiple-gatekeeper configuration steps: 1. Configure local zones. 2. Configure remote zones. 3. Configure local and remote prefixes. 4. Configure the bandwidth between zones.

© 2006 Cisco Systems, Inc. All rights reserved. GWGK v Interconnecting Gatekeepers (Cont.) Phone Phone Zone SanJose Zone Chicago Phone Phone GK GK Gatekeeper with one local and one remote zone Zone prefixes will be used for call routing. GK=Gatekeeper

© 2006 Cisco Systems, Inc. All rights reserved. GWGK v zone remote other-gatekeeper-name other-domain-name other- gatekeeper-ip-address [port-number] [cost cost-value [priority priority-value]] [foreign-domain] [invia inbound gatekeeper] | [outvia outbound gatekeeper] router(config-gk)# To statically specify a remote zone, use the zone remote command in gatekeeper configuration mode. A remote zone points to another gatekeeper. In order to configure remote zones, you have to know the remote zone (gatekeeper name) and the IP address of the remote gatekeeper. Interconnecting Gatekeepers: Zone Command

© 2006 Cisco Systems, Inc. All rights reserved. GWGK v Interconnecting Gatekeepers: Local Zones Phone Phone Zone SanJose Zone Chicago Phone Phone GK GK gatekeeper zone local Chicago cisco.com no shutdown gatekeeper zone local SanJose cisco.com no shutdown GK=Gatekeeper

© 2006 Cisco Systems, Inc. All rights reserved. GWGK v Interconnecting Gatekeepers: Remote Zones Phone Phone Zone SanJose Zone Chicago Phone Phone GK GK gatekeeper zone local Chicago cisco.com zone remote SanJose cisco.com no shutdown gatekeeper zone local SanJose cisco.com zone remote Chicago cisco.com no shutdown GK=Gatekeeper

© 2006 Cisco Systems, Inc. All rights reserved. GWGK v Interconnecting Gatekeepers: Prefix Configuration Phone Phone Zone SanJose Zone Chicago Phone Phone GK GK gatekeeper zone local Chicago cisco.com zone remote SanJose cisco.com zone prefix Chicago 3... gw-priority 10 CH_CM_1 zone prefix Chicago 3... gw-priority 9 CH_CM_2 zone prefix SanJose 2... no shutdown gatekeeper zone local SanJose cisco.com zone remote Chicago cisco.com zone prefix SanJose 2... gw-priority 10 SJ_CM_1 zone prefix SanJose 2... gw-priority 9 SJ_CM_2 zone prefix Chicago 3* no shutdown GK=Gatekeeper

© 2006 Cisco Systems, Inc. All rights reserved. GWGK v Configuring Directory Gatekeepers Directory gatekeeper configuration steps: 1. Configure zones and prefixes on the directory gatekeeper. 2. Configure LRQ forwarding on the directory gatekeeper. 3. Configure zones and prefixes on all other gatekeepers.

© 2006 Cisco Systems, Inc. All rights reserved. GWGK v Directory Gatekeepers in a Network Phone Phone Zone SanJose Zone Chicago GK1GK2 Phone Phone Zone Directory Gatekeeper The zone directory gatekeeper will be responsible for call routing between the zones. Gatekeeper 1 will send calls for site 2 to directory gatekeeper instead of gatekeeper 2. Gatekeeper 2 will send calls for site 1 to directory gatekeeper instead of gatekeeper 2 GK=Gatekeeper

© 2006 Cisco Systems, Inc. All rights reserved. GWGK v lrq forward-queries router(config-gk)# Enables a gatekeeper to forward LRQ messages that contain E.164 addresses Matches zone prefixes controlled by remote gatekeepers Configuring Directory Gatekeepers: LRQ Forwarding lrq lrj immediate-advance router(config-gk)# Enables a gatekeeper to immediately send a sequential LRQ message to the next zone after it receives an LRJ message from a gatekeeper in the current zone When not specified, you have to wait for 15 seconds

© 2006 Cisco Systems, Inc. All rights reserved. GWGK v Configuring Directory Gatekeepers: Zones and Prefixes Phone Phone Zone SanJose Zone Chicago GK1GK1 GK2GK2 Phone Phone Zone Directory Gatekeeper gatekeeper zone local DGK cisco.com zone remote SanJose cisco.com zone remote Chicago cisco.com zone prefix SanJose 2* zone prefix Chicago 3* no shutdown

© 2006 Cisco Systems, Inc. All rights reserved. GWGK v Configuring Directory Gatekeepers: LRQ Forwarding Phone Phone Zone SanJose Zone Chicago GK1GK1 GK2GK2 Phone Phone gatekeeper zone local DGK cisco.com zone remote SanJose cisco.com zone remote Chicago cisco.com zone prefix SanJose 2* zone prefix Chicago 3* lrq forward-queries no shutdown Zone Directory Gatekeeper

© 2006 Cisco Systems, Inc. All rights reserved. GWGK v Configuring Gatekeepers for Communicating with a Directory Gatekeeper Phone Phone Zone SanJose Zone Chicago Phone Phone gatekeeper zone local Chicago cisco.com zone remote DGK cisco.com zone prefix Chicago 3... gw-priority 10 CH_CM_1 zone prefix Chicago 3... gw-priority 9 CH_CM_2 zone prefix DGK * gw-type-prefix 1# default-technology bandwidth interzone default 768 no shutdown DGKDGK Zone DGK GK gatekeeper zone local SanJose cisco.com zone remote DGK cisco.com zone prefix SanJose 2... gw-priority 10 SJ_CM_1 zone prefix SanJose 2... gw-priority 9 SJ_CM_2 zone prefix DGK * gw-type-prefix 1# default-technology bandwidth interzone default 768 no shutdown GK1 GK=Gatekeeper

© 2006 Cisco Systems, Inc. All rights reserved. GWGK v Restricting Gatekeeper Registration IP WANPSTN Phone Phone Phone Phone Zone SanJose Zone Chicago Router1 Router2 (H.323) GK Will register at the gatekeeper Has to control which devices are allowed to register Terminal GK=Gatekeeper

© 2006 Cisco Systems, Inc. All rights reserved. GWGK v no zone subnet local-gatekeeper-name default enable router(config-gk)# When using zone subnets, you first disable the registration and discovery process for all subnets. Configuring the Zone Subnet Command zone subnet local-gatekeeper-name {default | subnet- address {/bits-in-mask | mask-address}} enable To configure a gatekeeper to accept discovery and registration messages sent by endpoints in designated subnets, use the zone subnet command in gatekeeper configuration mode. You can use the zone subnet command more than once to create a list of subnets controlled by a gatekeeper. To specify a particular endpoint, you can supply its address with a 32-bit mask.

© 2006 Cisco Systems, Inc. All rights reserved. GWGK v Configuring the Zone Subnet Command (Cont.) IP WANPSTN Phone Phone Phone Phone Zone SanJose Zone Chicago Router1 (MGCP) Router2 (H.323) Terminal GK Network Network Not all gateways or endpoints should be allowed to register with the gatekeeper. GK=Gatekeeper

© 2006 Cisco Systems, Inc. All rights reserved. GWGK v Configuring the Zone Subnet Command (Cont.) IP WANPSTN Phone Phone Phone Phone Zone SanJose Zone Chicago Router1 (MGCP) Router2 (H.323) Terminal gatekeeper...(output omitted) no zone subnet SanJose default enable no zone subnet Chicago default enable zone subnet SanJose /24 enable (Network) zone subnet Chicago /32 enable (Gateway) zone subnet Chicago /32 enable (Terminal) no shutdown GK Network Network GK=Gatekeeper

© 2006 Cisco Systems, Inc. All rights reserved. GWGK v Example: Zone Subnet Zone SanJose Zone Chicago Should register in zone SanJose Should register in zone Chicago gatekeeper zone local SanJose cisco.com zone local Chicago cisco.com no zone subnet SanJose default enable no zone subnet Chicago default enable zone subnet SanJose /32 enable zone subnet Chicago /32 enable no shutdown GK Without zone subnet configuration both terminals would be registered in zone SanJose GK=Gatekeeper

© 2006 Cisco Systems, Inc. All rights reserved. GWGK v Verifying Advanced Gatekeeper Functionality debug h225 asn1 debug ras debug gate main [5] [10] show gatekeeper calls show gatekeeper endpoints show gatekeeper zone status

© 2006 Cisco Systems, Inc. All rights reserved. GWGK v Summary For network scalability, multiple gatekeepers can be used. Each zone can be managed by one gatekeeper. Gatekeepers can be interconnected with the zone remote configuration command in gatekeeper configuration mode. Directory gatekeeper configuration is similar to a normal gatekeeper configuration except for LRQ forwarding. By default, a gatekeeper accepts all registration requests. This can be changed through the zone subnet command. For verification of multiple gatekeepers and directory gatekeepers, you can use several show and debug commands.

© 2006 Cisco Systems, Inc. All rights reserved. GWGK v