voip on Bay/Nortel ARN w/ BayRS 14.0
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Posted by seanfulton on July 19, 2005, 2:21 pm
Please log in for more thread options I've got a Nortel ARN that has worked fine for 10 years, most recently on BayRS 13.2. We subscribed to Vonage and installed four VOIP adapters on our network and now have problems. Basically, voice calls are fine so long as no traffic goes over the link. If you initiate the call, then, for example, begin an FTP download over the T1 link, the phone call immediately goes garbled and is hardly usable. I upgraded the router to 14.0 and enabled both DiffServ and RSVP, but do not know how to use them properly. Our support contract has run out and I'm investigating getting a renewal so I can download the latest BayRS but I'm wondering if this will solve the problem or if there is something else I can do. Any advice would be greatly appreciated. sean | |||||||||||||||||||
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Posted by T. Sean Weintz on July 19, 2005, 5:35 pm
Please log in for more thread options seanfulton wrote: Use protocol priority to put the VOIP in the high priority queue, and everything else in the medium priority (or low priority) queue. Do it by adding protocol priority to your outbound interface. Create a prtotocol prioirty template specifying a match on the source address, using the sourse IP address of the Vonage adapter, and placing the packet in the high queue as the action. Then create a filter for that interface using the template you crteated. Works for me. Let me know if you need more detailed instructions. | |||||||||||||||||||
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Posted by seanfulton on July 20, 2005, 2:21 pm
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Thank you for the response. I was trying to do it by udp port since the vonage adapters are using DHCP, but I will assign them static IP addresses and force it that way since that sounds like it works better. I will try it and post if I need help. sean | |||||||||||||||||||
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Posted by seanfulton on July 20, 2005, 10:21 pm
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I created the filter exactly as you describe and it seemed to help quite a bit. Only problem that I can detect is if I do a big FTP download (and this is a full T1), it still garbles the call, although not as badly. I used the bandwidth meter Vonage has on their site and during idle times, it says I have 1.4-1.5 Mbps. During the FTP, that drops to 394K or so. Still plenty of bandwidth for the call, so I'm wondering if I also need a filter to drop FTP to a lower priority or if this is just as good sa it gets. sean | |||||||||||||||||||
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Posted by I am a Sock Puppet on July 21, 2005, 3:54 pm
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seanfulton wrote: > I created the filter exactly as you describe and it seemed to help
> quite a bit. Only problem that I can detect is if I do a big FTP > download (and this is a full T1), it still garbles the call, although > not as badly. > > I used the bandwidth meter Vonage has on their site and during idle > times, it says I have 1.4-1.5 Mbps. During the FTP, that drops to > 394K or so. Still plenty of bandwidth for the call, so I'm wondering > if I also need a filter to drop FTP to a lower priority or if this is > just as good sa it gets. > > sean > Part of the issue here is that you can't control how inbound (to you) packets queue up from your ISP router to you - you can only control traffic after it hits your ARN. Giving FTP lower prioity may help. Also, for the protocol priority interface setup, I set the queue distibution in a REALLY steep curve - 95% to the high queue, 4% to the med queue and 1% to the low queue. Also, enable the "dequeue at line rate". That seems to minimze network jitter in my experience. -- DO NOT REPLY TO THE EMAIL ADDRESS IN THE HEADERS OF THIS POST. IT IS A SPAM TRAP ADDRESS. | |||||||||||||||||||
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> on BayRS 13.2. We subscribed to Vonage and installed four VOIP
> adapters on our network and now have problems.
>
> Basically, voice calls are fine so long as no traffic goes over the
> link. If you initiate the call, then, for example, begin an FTP
> download over the T1 link, the phone call immediately goes garbled
> and is hardly usable.
>
> I upgraded the router to 14.0 and enabled both DiffServ and RSVP, but
> do not know how to use them properly.
>
> Our support contract has run out and I'm investigating getting a
> renewal so I can download the latest BayRS but I'm wondering if this
> will solve the problem or if there is something else I can do.
>
> Any advice would be greatly appreciated.
>
> sean
>