Asterisk Project : Configuring res_pjsip for IPv6

Tell Asterisk and PJSIP to Speak IPv6

The configuration described here happens in the pjsip.conf file within transport and endpoint sections. For more information about the transport side of things see PJSIP Transport Selection

Bind PJSIP to a specific interface

To configure res_pjsip for communication over an IPv6 interface you must modify the bind address for your transports in pjsip.conf.

[transport-udp6]
type=transport
protocol=udp
bind=[fe80::5e26:aff:fe4b:4399]
 
[transport-tcp6]
type=transport
protocol=tcp
bind=[fe80::5e26:aff:fe4b:4399]

Bind PJSIP to the first available IPv6 interface

A transport can be configured to automatically bind to the first available IPv6 interface. You use "::" as the bind address.

[transport-auto-ipv6]
type=transport
protocol=udp
bind=::

Configure a PJSIP endpoint to use RTP over IPv6

If the communication involves an endpoint (almost always) then the endpoint must be configured to allow RTP via ipv6.

[mytrunk]
type=endpoint
transport=transport-udp6
context=from-external
disallow=all
allow=ulaw
rtp_ipv6=yes