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<FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>Hey all,<BR>
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I am in the process of refreshing my Cisco 871 router configurations (5th build now ) and I was looking for some input in regards to maintaining my voice quality the best I can over the Internet. I have been doing voice over IPSec for the last 5-6 years and it seems like it never gets easier. :)<BR>
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Right now we have about 35 users deployed remotely using Cisco 871W routers and Cisco 7960 phones behind them. They are connected to two DMVPN hubs (for redundancy). We have voice prioritized (among other items) within the Tunnels and all works as expected (utilizing priority queues, qos pre-classify, etc.). <BR>
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With the increase in home user bandwidth (10 meg / 12 meg) we are starting to notice congestion on our 6 meg Internet link when large amounts of data is sent or received over the tunnel Interfaces, which in the end causes congestion, which in turn effects call quality. We utilize PacketShaper’s on the internet links to prioritize IPSec traffic, but when all the traffic is IPSec traffic, there are issues. <BR>
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I am looking into some possibilities of removing the voice traffic to maintain call quality at all costs, and I have come up with a few ideas.<BR>
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</SPAN></FONT><OL><LI><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>Creating two DMVPN tunnels, one that carries only voice, and the other that carries the rest of the data, and then using the PacketShaper to guarantee bandwidth to the DMVPN tunnel that carries voice above all other data.
</SPAN></FONT><LI><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>Pulling the voice traffic out of the tunnel and using PhoneProxy on the ASA’s then utilizing PacketShaper to guarantee bandwidth to the srtp session above all other data.<BR>
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If anyone can throw out some pros and cons to either of these ideas, I would like to hear them. Also, if anyone knows of a better appliance for managing QoS at the Internet level other than the PacketShaper, I would like to hear that as well (outside of Cisco IOS QoS).<BR>
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Thanks in advance,<BR>
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Matt</SPAN></FONT>
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