On Tue, 29 Nov 2005, Kim Onnel wrote:
The links are now almost always fully utilized, we want to do some QoS to cap our ADSL downstream, to give room for the Corp. customers traffic to flow without pain.
While some people will cry network neutrality and think the Yellow Pages must sell only one size listing, some people are willing to pay for differentiated service. Trying to classify "bad" traffic can be done using products like Sandvine. But it may be easier to classify "premium" traffic and mark it for special handling, and then treating everything that isn't marked as premium traffic as best effort traffic. But expect great wailing and gnashing of teeth over setting or changing DSCP/TOS bits or creating different queues for different traffic. Should DSCP bits in IP headers be treated like TTL bits which are modified by the network. Should ISPs use anti-spoofing techniques similar to prevent the use of arbitrary IP addresses to control DSCP/TOS values in packet headers? Most routers already give priority to some types of traffic, such as routing update packets.