I apologize about doubling these up, I forgot the subject! I have a cisco VPN from router to router over a Data T-1. The ping times are consistently 32ms with random ping responses of 295ms -408ms about every 30 secs to a minute, I have jitter buffer enabled. The connection goes like this... Mitel SIP phone to Asterisk A, IAX trunked to Asterisk B and then T-1 to a PBX, the calls are internal so they are terminating on Toshiba digital phones. Loud crackling even happens from time to time when a Mitel SIP phone is connected to Asterisk B at that location over thye LAN with no layer three routing, but it is consistent on the IAX trunk. There is a lot of Data traffic, but thus should work regardless, I don't think the ping times are the issue. Jordan Novak Communications Technician -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.digium.com/pipermail/asterisk-users/attachments/20060517/9ab2a333/attachment.htm
> I have a cisco VPN from router to router over a Data T-1. The ping times > are consistently 32ms with random ping responses of 295ms -408ms about > every 30 secs to a minute, I have jitter buffer enabled. The connection > goes like this? Mitel SIP phone to Asterisk A, IAX trunked to Asterisk B > and then T-1 to a PBX, the calls are internal so they are terminating on > Toshiba digital phones. Loud crackling even happens from time to time > when a Mitel SIP phone is connected to Asterisk B at that location over > thye LAN with no layer three routing, but it is consistent on the IAX > trunk. There is a lot of Data traffic, but thus should work regardless, > I don?t think the ping times are the issue.If I had to troubleshoot the issue, I'd start with using Ethereal to "see" what type of traffic was happening every 30 seconds or so (causing the erratic ping times). Then I'd also be looking at 'iax2 show netstats' to see what the jitter, delay, and lost packets look like. If the ethereal packet trace indicates unusual traffic or broadcast storms, see if those can be corrected. Might even try 'fair weighted queuing' in the Cisco box to see what impact it may have (attempts to provide equal amounts of bandwidth to each session crossing the vpn).
Jordan Novak schrieb:> I have a cisco VPN from router to router over a Data T-1. The ping times > are consistently 32ms with random ping responses of 295ms -408ms about > every 30 secs to a minute, I have jitter buffer enabled. The connection > goes like this? Mitel SIP phone to Asterisk A, IAX trunked to Asterisk B > and then T-1 to a PBX, the calls are internal so they are terminating on > Toshiba digital phones. Loud crackling even happens from time to time > when a Mitel SIP phone is connected to Asterisk B at that location over > thye LAN with no layer three routing, but it is consistent on the IAX > trunk. There is a lot of Data traffic, but thus should work regardless, > I don?t think the ping times are the issue.I had exact the same problem http://groups.google.com/group/comp.dcom.sys.cisco/browse_frm/thread/8cd09069f1aa3288 Solution: http://groups.google.com/group/comp.dcom.sys.cisco/msg/de9a2fe1aa463bca Our ACL in our Router was to big. Allow your VPN Tunnel on the top of your incoming ACL. Maybe this helps you, Patrick