06-14-2007 05:09 PM - edited 03-14-2019 10:05 PM
L2 switchport is trust the device. Then, will L2 switch use the dscp value to classify the traffic or the cos value ?
06-15-2007 04:31 AM
Hi
You set the switchports (depending on hardware and software versions) like so:
mls qos trust dscp (to use DSCP to classify)
mls qos trust cos (to trust CoS)
If you have the port set up to conditionally trust the cisco-phone, then it uses CoS and can optionally instruct the phone to mark down PC-port traffic.
Regards
Aaron
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06-19-2007 01:34 PM
L2 switchports won't look at DSCP values since DSCP is a L3 header. CoS tags are only carried through on trunk links. L3 switchports won't trust DSCP, and you need to trust it with the 'mls qos trust' commands recommended above.
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