I have a network of offices using Asterisk that are connected via IAX2 > trunks. The trunks work great for a day or two then for no reason at all one > end of the trunk will become UNREACHABLE while the other end is still > connected. The oving nly way to fix the problem is to shutdown Asterisk > completly then start it backup again. The end that dies is not always the > same, some times it is server A and some times it is server B. Never have I > seen that both ends die, just one. The side that is still connected can make > calls to the end that died but not the other way. If you call from the > server with the dead IAX2 trunk you here "All circuts are busy now." All > networks have static IP addresses and their firewalls are setup to allow UDP > 4569 to come in to the Asterisk systems. >
We've got customers who experience this problem. We believe it is a fault with their NAT routers - I've traced traffic and our return packets do not arrive at their Asterisk box. Rebooting their NAT/ADSL routers fixes the problem. (Restarting their Asterisk does too - I assume the traffic from the box causes the NAT router to re-open a mapping. Steve
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