Theoretically, setting TOS value ( these days called DSCP) wont change anything in switch behavior, unless you are using Layer 3 switches.<br>What makes a difference in a switch is COS bits, and i'm not sure how asterisk sets that.<br>
I guess to be safe, you would need to create 2 VLANS and in the switch define on VLAN as a high priority VLAN.<br><br><br><div class="gmail_quote">On Feb 3, 2008 7:06 PM, Michael Graves <<a href="mailto:mgraves@mstvp.com">mgraves@mstvp.com</a>> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div class="Ih2E3d">On Sun, 03 Feb 2008 22:11:04 +0100, Benny Amorsen wrote:<br><br>>"John Williams" <<a href="mailto:jw.ip.pbx@gmail.com">jw.ip.pbx@gmail.com</a>> writes:<br>
><br>>> We are tearing out legacy PBX and replacing with Asterisk PBX and new<br>>> LAN for our 90+ person operation. Question: what QOS capabilities<br>>> (protocols, etc) does Asterisk support/require in a LAN switch to deliver<br>
>> business grade phone service? Thanks<br>><br>>If you have one switch for the whole network, you're generally fine<br>>without QoS. Switches these days can handle full bandwidth on all<br>>ports at the same time.<br>
><br>>Anyway, Asterisk is no different from other PBX's when it comes to<br>>QoS. Should it turn out that you actually need it on the LAN, just be<br>>sure you set the tos parameters in sip.conf to something that is<br>
>prioritized by the switch.<br><br></div>It tends to be more of an issue when you're sending calls over a link<br>with limited bandwidth. Usually more of a concern in the router.<br><br>Michael<br>--<br><font color="#888888">Michael Graves<br>
mgraves<at><a href="http://mstvp.com" target="_blank">mstvp.com</a><br><a href="http://blog.mgraves.org" target="_blank">blog.mgraves.org</a><br>o713-861-4005<br>c713-201-1262<br><a href="mailto:sip:mjgraves@pixelpower.onsip.com">sip:mjgraves@pixelpower.onsip.com</a><br>
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