01-29-2008 05:34 AM - edited 03-05-2019 08:46 PM
Hi all, when using say siemens voice phones, do they mark the dcsp or 802.1p tag ? and can switches nowadays read both ?
02-04-2008 10:36 AM
I think it depends upon your QOS setings and device implementaion. You can configure the switch to trust or override the traffic priority assigned by a IP phone.
02-12-2008 09:50 AM
ok, so does the switch look at the dscp header? does it treat this as a tagged packet as i believe tagged means 802.1q, whereas the dscp header is in the ip payload part of the packet, so would the switch still treat this as a tagged packet .
please explain
02-17-2008 11:49 PM
can anyone clarify on this
02-18-2008 12:11 AM
Yes.. the new range of L2 switches are capable of reading the DSCP bits
Phone by defualt can set both the DSCP as well as the 802.1p values. You can configure your port to trust either the Cos or DSCP
DSCP is preferred as it would be end to end while with COS you would require COS-DSCP mapping
HTH
Narayan
05-30-2008 06:15 PM
Carl,
Did you get your QoS setup properly for Siemens' phones. I have a customer with Siemens phones and can't seem to find documentation of the dscp values for the phones. Any help would be greatly appreciated.
Thanks,
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