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Roberto,
when you don’t have a congestion within FR cloud, DE-marked frames are treated just every others. In case of real congestion, DE-frames basically get dropped first (have lower thresholds in queues).
You may choose to always mark “non-priority” traffic with DE bit, to raise chances of this traffic being dropped first, before the “critical” packets, thereby giving the latter a better chances of being delivered through congested network.
In your configuration, you mark all HTTP packets with DE bit in FR frames, regardless of interface congestion state. You may also set DE bit as policer markdown action.
HTH
2006/7/7, Roberto Fernandez : > > Friends, > > There is a router, connecting to frame relay cloud. The requirement is > to mark DE on some traffic at the time of congestion. It’s that > possible? I mean selectively mark DE only during congestion? > > I’m not sure if DE will be set always on HTTP class, or only when > shaping is activated as a sign of congestion. > > > I’ve been thinking on something like: > > ! > class-map match-all HTTP > match protocol http > ! > ! > policy-map SHAPE-FIRST > class class-default > shape average 1536000 > service-policy SET_DE_OUT > ! > ! > policy-map SET_DE_OUT > class HTTP > set fr-de > ! > ! > Interface Serial 0/0 > Service policy out SHAPE-FIRST > ! > > _______________________________________________________________________ > Subscription information may be found at: > http://www.groupstudy.com/list/CCIELab.html >

– Petr Lapukhov, CCIE #16379 petr@internetworkexpert.com
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