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At the egress node, packets are examined to determine if their IEEE 802.1p bits or DSCP will be re-marked before leaving the DiffServ network. Upon examination, if the packet is egressing as a tagged packet, the IEEE 802.1p tag is set based on the QoS level-to-IEEE 802.1p bit mapping. In routed packets, the DSCP remains unchanged; in bridged packets, however, the DSCP is reset based on the QoS level.
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