Al lists wrote: > Theoretically, setting TOS value ( these days called DSCP) wont change > anything in switch behavior, unless you are using Layer 3 switches. > What makes a difference in a switch is COS bits, and i'm not sure how > asterisk sets that. > I guess to be safe, you would need to create 2 VLANS and in the switch > define on VLAN as a high priority VLAN.
At least for quite few years (more than 5), layer 2 switches from Nortel (disclaimer, I used to work for NT), would be able to match DSCP (or remark DSCP also, based in l3/l4 information) and give priority as defined by the user, to specific DSCP #, like EF to highest priority and goes on. I've no reason to believe other vendors don't have at least this capability. > On Feb 3, 2008 7:06 PM, Michael Graves <[EMAIL PROTECTED]> wrote: > >> On Sun, 03 Feb 2008 22:11:04 +0100, Benny Amorsen wrote: >> >>> "John Williams" <[EMAIL PROTECTED]> writes: >>> >>>> We are tearing out legacy PBX and replacing with Asterisk PBX and new >>>> LAN for our 90+ person operation. Question: what QOS capabilities >>>> (protocols, etc) does Asterisk support/require in a LAN switch to >> deliver >>>> business grade phone service? Thanks >>> If you have one switch for the whole network, you're generally fine >>> without QoS. Switches these days can handle full bandwidth on all >>> ports at the same time. >>> >>> Anyway, Asterisk is no different from other PBX's when it comes to >>> QoS. Should it turn out that you actually need it on the LAN, just be >>> sure you set the tos parameters in sip.conf to something that is >>> prioritized by the switch. >> It tends to be more of an issue when you're sending calls over a link >> with limited bandwidth. Usually more of a concern in the router. >> >> Michael >> -- >> Michael Graves >> mgraves<at>mstvp.com >> blog.mgraves.org >> o713-861-4005 >> c713-201-1262 >> sip:[EMAIL PROTECTED] >> skype mjgraves >> fwd 54245 _______________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
