On 2/6/14, 10:50 PM, Teco Boot wrote: > > Op 6 feb. 2014, om 20:39 heeft Brian E Carpenter > <[email protected]> het volgende geschreven: > >> On 06/02/2014 20:46, Mikael Abrahamsson wrote: >>> On Thu, 6 Feb 2014, Brian E Carpenter wrote: >>> >>>> We designed diffserv for this purpose and it works well and is quite >>>> widely used in corporate networks. Wasting prefixes to distinguish >>>> traffic types is an incredibly bad idea. >>> >>> Problem with DSCP is that you have to reset them for a non-qos service >>> in your network (unless you're running some kind of encapsulation scheme >>> such as tunnels or MPLS). >> >> Sorry, what, why? DSCP is a no-op for a router that doesn't >> implement diffserv, so why would you ever need to reset them? >> (It's normal for border routers to clear the DSCP if they want to, >> of course; no harm, no foul.) > > No harm? Hmm. Two edge networks are connected via backbone and try to use end > to end QoS. It is not unusual to add a tunnel, just to protect against DSCP > rewrites.
if you include the DSCP in your hash algorithm really funny things happen when providers that set them differently on different parts of the same flows (e.g. prioritizing syn/ack) fail to sanitize them at their border. there's a lot of pollution in DSCP which means you really should sanitize them before you employ those bits. > Teco > > > _______________________________________________ > homenet mailing list > [email protected] > https://www.ietf.org/mailman/listinfo/homenet >
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