Each site has a full T1.
The Avaya switch automatically tags traffic with DSCP, 46. I also have a managed switch tag data from the avaya's physical port with 802.1p 6 (Voice traffic). The SonicWall maps these packets to the appropriate settings on the outer VPN packet layer as it leaves the sonicwall (this has been confimed with some packet sniffing).
I did some experimenting and used an under-utilized DSL link that our headquarters has as our VPN tunnel. VoIP quality has improved drastically, however, I can still get our outbound data to jitter when I initiate an upload on a bandwidth-hogging protocol (say http). I have a the sonicwall is shaping the traffic, but our border router is not getting these packets out in time (we have a cisco 2501). I am going through the process of configuring the router with priority queues to handle VPN traffic with a higher priority then normal traffic. Anyone think I am barking up the wrong tree here?
Thanks
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by: grbladesPosted on 2005-10-12 at 02:17:18ID: 15067214
What type and speed of internet connection do you have at each site?
I would suggest you look at the Sonicwalls QOS features so that you can use it to prioritise the traffic. This will help if the problem is the outbound data from the satellite office but if it is the inbound data on the main office which is causing the problem you will need to take a different approach.
Often the best way is to dedicate a VPN for voice traffic only and wither use a reserved bandwidth on your internet connection (If you have E1/T1 for example) or a completely separate internet connection (if you have DSL).