If there isn't a specific peering agreement which sets up DSCP marks with your Z side, you're going to have a bad time doing anything other than remarking to 0.
-Blake On Tue, May 5, 2015 at 6:35 PM, Tim Jackson <jackson....@gmail.com> wrote: > In general there are very few bad actors here in regards to > trusting/accepting/using DSCP across the internet. > > Apple has a tendency to mark some traffic with EF that shouldn't be EF on > PNIs, and Cogent leaks a lot of their internal markings into customers, but > it's generally unmarked traffic from certain customers/peers. Other than > that IMHO it's totally valid to accept, and nobody abuses it (other than > those 2). > > We accept DSCP from the internet and do queue a few things higher towards > customers for things like OTT VoIP etc. > > Remarking DSCP is bad IMHO, trusting it is another thing. You just have to > be careful, and I suggest good netflow tools to keep an eye on it. > On May 5, 2015 5:30 PM, "Ramy Hashish" <ramy.ihash...@gmail.com> wrote: > >> Good day all, >> >> A simple question, does Internet trust IP DSCP marking? Assume two ASs >> connected through two tier 1 networks, will the tier one networks trust any >> DSCP markings done from an AS to the other? >> >> Thanks, >> >> Ramy >>
