[j-nsp] Setting CoS bits on ingress frames

Mark Tinka mark.tinka at seacom.mu
Thu Jun 25 07:58:14 EDT 2015

On 25/Jun/15 09:20, Alexander Arseniev wrote:
> Hello,
> The FC in JUNOS is the same as "qos-group" in CSCO IOS - invisible
> internal-only field which travels along with packet content across the
> switch, but is never inserted in the actual packet. The FC has
> significance for choosing output scheduling, RED drop, marking.

That's exactly right.

The classifier is to help the router determine how to schedule traffic
on egress. It does not mark/re-mark traffic.


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