[asterisk-bugs] [JIRA] (ASTERISK-21303) qualifygap SIP general setting appears broken

[JoshE (JIRA)]

JoshE created ASTERISK-21303:
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             Summary: qualifygap SIP general setting appears broken
                 Key: ASTERISK-21303
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-21303
             Project: Asterisk
          Issue Type: Bug
      Security Level: None
    Affects Versions: 11.2.1
            Reporter: JoshE


Running Asterisk 11 with around 1600 realtime peers, all of which are qualified behind remove NAT devices.  

I am seeing an extremely painful issue with sip reloads generating massive storms of OPTIONS messages, most of which can't be responded to within 2000 ms, so the peer goes missing.  In the case where SRV endpoints are used, this generates a storm of traffic to secondary/tertiary servers, which puts the entire system in a loop.

My initial solution was to use the qualifygap setting in sip.conf [general].  However, this appears to actually be broken.  When setting this setting to 500 or even 1200, I am still seeing many, many options messages / time period.  I am not sure I have implemented qualifygap correctly, as there is effectively no documentation on it.  I am not sure what the "group" referenced in the comments ("Number of milliseconds between each group of peers being qualified") refers to.  The sip_poke_all_peers seems to not differentiate anything on the basis of any sort of group.

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