Table Of Contents

Configuring Cisco IOS Gateways

Configuring Cisco IOS Gateways

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Revised: June 08, 2010, OL-19142-02

 

The example in this appendix illustrates how to configure Cisco IOS gateways to enable Alternative Network Address Types (ANAT), the ANAT addressing preference, and SIP trunk signaling.

For additional information on IPv6 configuration, refer to the following documentation:

•Cisco IOS Voice Command Reference

http://www.cisco.com/en/US/docs/ios/voice/command/reference/vr_book.html

•Cisco IOS IPv6 Command Reference

http://www.cisco.com/en/US/docs/ios/ipv6/command/reference/ipv6_book.html

Cisco IOS Gateway Configuration

2800-Router(config)#voice service voip

Shut down the voice service voip to configure dual-stack mode and ANAT preference:

2800-Router (conf-voi-serv)#shutdown

2800-Router (conf-voi-serv)#sip-ua

2800-Router (config-sip-ua)#protocol mode dual-stack preference ?

  ipv4  IPv4 address is preferred

  ipv6  IPv6 address is preferred 

2800-Router (config-sip-ua)#protocol mode dual-stack preference ipv4

2800-Router (config-sip-ua)#voice service voip

2800-Router (conf-voi-serv)#no shutdown

Now the gateway is configured as dual-stack gateway with IPv4 preference.

ANAT is enabled globally by default, but can also be enabled by the following commands:

2800-Router (config-sip-ua)#voice service voip

2800-Router (conf-voi-serv)#sip

2800-Router (conf-serv-sip)#anat

Use the following command to enable ANAT on each dial-peer:

dial-peer voice 1 voip

 description **** SIP Trunk to CUCM ****

 destination-pattern 5...

 voice-class sip anat                          

 session protocol sipv2

 session target ipv6:[2001:db8:caf0:101:21b:78ff:fe7a:5d86]   

For signaling, only one destination address can be set, and it should be either IPv4 or IPv6.

 session transport tcp

 dtmf-relay rtp-nte

 no vad