I've been wondering this for a few years too. I'm guessing that comment has scared everyone away from enabling it to test it out. At a guess if there's any issue it's within the Sofia-SIP stack and therefore trickier to debug/patch than in mod_sofia. You could enable it and if there are any problems report them on Jira so they get looked into. I believe 100rel might be required for IMS implementations. On 17 April 2018 at 06:08, David Witham <david.witham@netsip.com.au> wrote:
Hi all,
We have had an upstream provider request that we enable 100rel support. I note in the wiki it says:
enable-100rel
This enable support for 100rel (100% reliability - PRACK message as defined in RFC3262 <http://tools.ietf.org/html/rfc3262>) This fixes a problem with SIP where provisional messages like "180 Ringing" are not ACK'd and therefore could be dropped over a poor connection without retransmission. *2009-07-08:* Enabling this may cause FreeSWITCH to crash, see FSCORE-392 <http://jira.freeswitch.org/browse/FSCORE-392>.
<param name="enable-100rel" value="true"/>
FSCORE-392 doesn't say if the crashing related to enabling 100rel was ever fixed. Can anyone confirm whether it is now safe to enable 100rel support?
regards, David
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