Here’s a strange one. Asterisk’s SIP channel completely craps out when I place the box into a different VLAN, but ZAP and IAX work just fine.
It seems to me that Asterisk’s SIP stack must depend on some unknown service that I lose when I change from VLAN 1 to VLAN 2. Does anybody have any ideas?
My SIP hardphones (Aastras) are in VLAN 2. My PC is in VLAN 1 & VLAN 2. When Asterisk is part of VLAN 1 & 2 there is no problem. But when I take Asterisk out of VLAN 1 my Aastras lose registration immediately. And no calls (from ZAP or IAX extensions) will go out Asterisk’s SIP trunks. But calls WILL go out ZAP trunks and IAX trunks. My IAX softphone on my PC works fine. It is only SIP that dies.
What could it be? (The port for the Internet link is in VLANs 1 & 2.)