I have a questing about internal DSCP on a 6500 that I'm not really sure about. I know that it's used to identify the priority of a frame/packet as it transits the switch but I have read on some sites that the internal DSCP is copied to the frame/packet as it leaves the switch. On other sites that when the packet arrives at the egress port the original ToS will be used. So im confused to which is true, see below.
"Upon output, the internal DSCP settings are copied to the IP header. If the outbound frame is being given a trunking header (ISL or 802.1Q) then the appropriate CoS bits are also set." "7.12 Egress ACL Support for Remarked DSCP When a frame transits the switch, classification performed by the PFC can change the ToS priority setting (IP Precedence or DSCP) in the packet. When the packet arrives at the egress port however, the default action will result in the original ToS priority (not the PFC remarked ToS priority) that was present on the arriving packet to be used for classification purposes." _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
