On Wed, 25 May 2005, Eric A. Hall wrote:
Again, you are under no obligation to do anything with QoS flags from non-paying customers, and I'm not advocating for anybody to get a free ride here. Ignore the markings, but leave them alone too.
Are you suggesting every router along the path needs to have a table lookup of every customer and which DSCP/TOS bits are valid for packets to or from that customer and which DSCP/TOS bits should be ignored. Diffserv is hop-by-hop, with each hop making a choice. Do you really think this scales well in a core network? If you want bit streams: TDM, ATM or Frame-Relay works well. But in the IP world, packets may be fragemented by intermediate nodes, TTL values are decremented, ECN bits are changed. Packet headers are changed on every packet passing through an IP network.