Re: [asterisk-users] Asterisk eventually fails when connection dies
Joseph L. Casale schrieb: I have a single server running asterisk 1.6.0.8 with a few sip voip providers and a tdm card for redundancy. It has a caching name server and the sip providers are hard coded in the hosts file. When the internet connection dies, it fails over to the dahdi channel as it should, but slowly the sip phones loose registration and the incoming dahdi channel can still answer the incoming call, but it doesn't pass it off the mailbox, it just says the person at extension... is not available? There is a custom recording setup that otherwise works? What does a guy got to do to keep asterisk up when the net connection fails? This is becoming a show stopper :( A persistent local DNS cache such as pdnsd[1] or djbdns[2] could help. [1] http://en.wikipedia.org/wiki/Pdnsd [2] http://en.wikipedia.org/wiki/Djbdns Philipp Kempgen -- AMOOMA GmbH - Bachstr. 126 - 56566 Neuwied - http://www.amooma.de Geschäftsführer: Stefan Wintermeyer, Handelsregister: Neuwied B14998 Asterisk: http://the-asterisk-book.com - http://das-asterisk-buch.de Videos of the AMOOCON VoIP conference 2009 - http://www.amoocon.de -- ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Asterisk eventually fails when connection dies
On Thu, 4 Jun 2009, Philipp Kempgen wrote: Joseph L. Casale schrieb: I have a single server running asterisk 1.6.0.8 with a few sip voip providers and a tdm card for redundancy. It has a caching name server and the sip providers are hard coded in the hosts file. When the internet connection dies, it fails over to the dahdi channel as it should, but slowly the sip phones loose registration and the incoming dahdi channel can still answer the incoming call, but it doesn't pass it off the mailbox, it just says the person at extension... is not available? There is a custom recording setup that otherwise works? What does a guy got to do to keep asterisk up when the net connection fails? This is becoming a show stopper :( A persistent local DNS cache such as pdnsd[1] or djbdns[2] could help. [1] http://en.wikipedia.org/wiki/Pdnsd [2] http://en.wikipedia.org/wiki/Djbdns Philipp Kempgen I am guessing it fails to reverse lookup your internal addresses (which would fail anyway, even with the DNS up). If your phones are static, just make entries in /etc/hosts for them. If they are dynamic, add entries in your /etc/hosts for all the addresses in your DHCP pool. You can watch the attempted outbound traffic with tcpdump and see what the server is trying to lookup when the registrations fail, and use /etc/hosts to precede the lookup. j ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Asterisk eventually fails when connection dies
A persistent local DNS cache such as pdnsd[1] or djbdns[2] could help. [1] http://en.wikipedia.org/wiki/Pdnsd [2] http://en.wikipedia.org/wiki/Djbdns Philipp Kempgen I am guessing it fails to reverse lookup your internal addresses (which would fail anyway, even with the DNS up). If your phones are static, just make entries in /etc/hosts for them. If they are dynamic, add entries in your /etc/hosts for all the addresses in your DHCP pool. You can watch the attempted outbound traffic with tcpdump and see what the server is trying to lookup when the registrations fail, and use /etc/hosts to precede the lookup. Philipp and Jeff, Thank you both for the help. So the phones are dynamic, and I don't assign host names. Shall I just create something simple like ip.addr extension_# for each phone and add dhcp reservations, so extension 200 would get: `192.168.13.127 200` in the hosts file? What would be the reason the recorded greeting doesn't get played right now while we are having an outage? Just part of asterisk failing under the current config? If no phones are available, should that not have an effect on what asterisk does when an inbound caller arrives? I am driving out now to see what it's doing, I suppose something like: # tcpdump src host 127.0.0.1 and udp dst port 53 would be what I need? Again, appreciate the guidance! Thanks, jlc ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Asterisk eventually fails when connection dies
On Thu, 4 Jun 2009, Joseph L. Casale wrote: A persistent local DNS cache such as pdnsd[1] or djbdns[2] could help. [1] http://en.wikipedia.org/wiki/Pdnsd [2] http://en.wikipedia.org/wiki/Djbdns Philipp Kempgen I am guessing it fails to reverse lookup your internal addresses (which would fail anyway, even with the DNS up). If your phones are static, just make entries in /etc/hosts for them. If they are dynamic, add entries in your /etc/hosts for all the addresses in your DHCP pool. You can watch the attempted outbound traffic with tcpdump and see what the server is trying to lookup when the registrations fail, and use /etc/hosts to precede the lookup. Philipp and Jeff, Thank you both for the help. So the phones are dynamic, and I don't assign host names. Shall I just create something simple like ip.addr extension_# for each phone and add dhcp reservations, so extension 200 would get: `192.168.13.127 200` in the hosts file? Sure. I might name it something like dhcp127 though. What would be the reason the recorded greeting doesn't get played right now while we are having an outage? Just part of asterisk failing under the current config? If no phones are available, should that not have an effect on what asterisk does when an inbound caller arrives? This must be your dialplan. Can you post it? I am driving out now to see what it's doing, I suppose something like: # tcpdump src host 127.0.0.1 and udp dst port 53 would be what I need? Close. The packets won't be leaving from the loopback address. Just something like: tcpdump port 53 should be plenty. Good luck! j Again, appreciate the guidance! Thanks, jlc ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Asterisk eventually fails when connection dies
Sure. I might name it something like dhcp127 though. That makes sense :) This must be your dialplan. Can you post it? You are right, never trust users :) They had erased it or something, it actually wasn't there. So it does go straight to vm as it should. My bad... Close. The packets won't be leaving from the loopback address. Just something like: tcpdump port 53 Heh, I didn't think this one through at all. The server is multihomed, one external nic and one internal nic. The external nic is connected directly to a cable modem with iptables rules. When the connection drops, the WAN interface loses its IP and therefore there is no default gateway, I tried to nslookup/dig some variations but no traffic was ever initiated outwardly (I clued on to the loopback problem quickly). I guess I couldn't see what it was trying to resolve, but I will make the changes above and test again in the meantime! Thanks a ton! jlc ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
