Hello everyone, I have some doubt on the QoS matter and I hope that someone could bring me some light. I see my 3Com 3300 switch supports 802.1p priorization , I see through Microsoft network monitor that the packet coming from my SIP phones have in IP header a field which is marked "Precedence" and when the packet is sent from phone to asterisk the value is "CRITICAL/EXP" , when the packet is sent back from asterisk to phone the value is "Normal". To correct this I set the value "Tos" in sip.conf to 160 and now the packet sent back from asterisk to phone is marked "CRITICAL/EXP" too. Fine. Under the field "Precedence" there is a value called "Type of Service" ( TOS ) and the values is "Normal" both ways.
Googling around I see that 802.1p is a Layer2 and not Layer3 specification so it must work at MAC level, so I think that these field which are contained into the IP header are not considered by my switch and are just ignored. The Ip precedence field I think would be considered when routed by a QoS router ( which is not my case ). Questions: 1) How can I set the 802.1p precedence field from Snom and asterisk? 2) Which is the differences between the IP Precedence field and TOS field? Thanks Everyone Eugenio _______________________________________________ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users