From: William Chen (kwchen@netvigator.com)
Date: Mon Jan 19 2004 - 21:37:32 GMT-3
If you globally turn on Qos on Catalyst 3550, the default trust state of a
port is not trusted and all the QoS marking will set to best-effort.
However, if you don't turn on Qos, the default is all packets are switched
without modification.
William Chen
----- Original Message -----
From: "ccie2be" <ccie2be@nyc.rr.com>
To: "Group Study" <ccielab@groupstudy.com>
Sent: Tuesday, January 20, 2004 4:43 AM
Subject: Port Trust State on 3550
> Hi all,
>
> According to the 3550 config guide, by default, the trust state of a port
is
> Not trusted.
>
>
http://www.cisco.com/univercd/cc/td/doc/product/lan/c3550/12119ea1/3550scg/sw
> qos.htm#1042819
>
> Does this mean, for example, that if a 3550 port receives a packet with
some
> qos field (cos, ip prec or dscp) set to a non zero value that it will
reset
> the value to the default value for the port ( which is, by default = 0 ) ?
>
> Thanks in advanced, dt
>
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