From: Japson Jacob (jjacobj) (jjacobj@cisco.com)
Date: Mon Sep 24 2007 - 15:10:09 ART
Hello expert,
I have a doubt in 3550 QOS .
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. The switch has only 256 VLAN labels (a few are always used internally
for defaults), which are
shared between VLAN maps and per-port per-VLAN policing. If a large
number of VLANs are used
in class maps and either different ACL actions are performed on them or
they have different VLAN
maps applied, the available VLAN labels might be insufficient. As a
consequence, the TCAM
entries are not programmed, and the feature does not work. Use the show
tcam qos tcam-id
port-labels vlan-labels privileged EXEC command to display how many VLAN
labels are in use
by this QoS feature.
* It is not possible to match IP fragments against configured IP
extended ACLs to enforce QoS. IP
fragments are sent as best-effort. IP fragments are denoted by fields in
the IP header.
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I came across the above stmts in 3550 QOS config guide page 28.
Could not get the meaning of it.
Any light on this from you side will be very helpful....
Thanks
Japson Jacob
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