[asterisk-users] IPv6 transport results in ICE with only IPv6 candidates

Joshua C. Colp jcolp at digium.com
Wed Apr 17 09:04:41 CDT 2019

On Wed, Apr 17, 2019, at 10:54 AM, Brian J. Murrell wrote:


> Presumably the problem with the [outgoing] endpoint is the
> specification of an IPv6-TCP transport. But I need to force the use of
> TCP, so how can I do that without limiting it to a particular IP
> protocol?

You specify the transport in the SIP URI. For example:

sip:test at example.com;transport=tcp

This will limit to TCP, and depending on the resolution of "example.com" use IPv6 or IPv4. The ICE candidates should then be both IPv6 and IPv4 since a transport is not explicitly specified.

Joshua C. Colp
Digium - A Sangoma Company | Senior Software Developer
445 Jan Davis Drive NW - Huntsville, AL 35806 - US
Check us out at: www.digium.com & www.asterisk.org

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