From: Joe Chang (changjoe@earthlink.net)
Date: Tue Apr 15 2003 - 12:34:40 GMT-3
Just to clarify, are you running a tunnel between your sites through the
ISPs layer 3 network? Are you saying the DSCP value of the payload packet is
getting erased and being assigned to the encapsulating packet's header?
----- Original Message -----
From: "Carlson, James" <james.m.carlson@mci.com>
To: <ccielab@groupstudy.com>
Sent: Tuesday, April 15, 2003 12:13 PM
Subject: QoS and Non-Supportive Networks
> All,
> Ok stupid question of the day. Lets say an ISP states that it does
> not support QoS yet your network is Diffserv compliant. If you set the
DSCP
> field in your network and influence the Egress router's handling of that
> packet, can you expect the same DSCP field on the Ingress to the router at
> the other end of the ISP's connection with my branch.
>
>
> Core Network --- |ISP| -- Branch office
> If DSCP is 46 Will it be 46 here.
>
>
> I used to think that IPSec and GRE would help out but unless qos
> pre-classify was used. But it turns out that the DSCP field is moved to
the
> re-packaged IP header regardless.
> Any BB engineers out there have some insight???
> Thanks,
> Jamie
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