Qo 3550: Per-port per-VLAN classification

From: Pierre-Alex Guanel (pierreg@planetkc.com)
Date: Wed Jul 28 2004 - 08:24:35 GMT-3


FROM CISCO DOCUMENTATION:

" Per-port per-VLAN classification is a per-port feature and does not work on
redundant links. It is supported only on an ingress port configured as a trunk
or as a static-access port. "

This will match traffic from vlan 10, 20-30- and 40 with a DSCP of 9

Switch(config)# class-map match-any dscp_class

Switch(config-cmap)# match ip dscp 9

Switch(config-cmap)# exit

Switch(config)# class-map match-all vlan_class

Switch(config-cmap)# match vlan 10 20-30 40

Switch(config-cmap)# match class-map dscp_class

Switch(config-cmap)# exit

QUESTION: how could you possibly receive traffic from VLAN 10, 20 etc.. on an
access-port !!!!!!????

    Per-port per-VLAN classification only make sense on a TRUNK, but Cisco
says that it works also on an access-port.

Can someone please shed some light with an exemple where doing this on an
access-port would make sense?

Thanks,

Pierre



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