Hi Joe, For step 1 - I think QoS groups are what you need - classify on ingress from BB1 - then do your re-marking magic on egress facing R2
Is this what you've been thinking about? http://www.cisco.com/en/US/docs/ios/12_2/qos/command/reference/qrfcmd8.html#wp1059093 Cheers, Adam On Sat, Jan 12, 2013 at 7:08 AM, Joe S <[email protected]> wrote: > I've got what will probably sound like a stupid QOS question, but I can't > come up with something I'm confident is the 'right' answer. > > Let's say I've got this setup > > R2 g0/0 -> g0/0 R1 g0/1 -> BB1 > > ...and then there's a serial connection from R1 to R3 > > And what I'm told is that any traffic coming from BB1 and destined for R2 > networks should be marked with DSCP13 and traffic from BB1 networks > destined for R3 should be set for DSCP EF. > > Because traffic from other directions could end up going through R1 to R2 > and R3 I can't just setup an outgoing policies on the relevant interfaces > to mark the DSCP. IIRC, last time I messed with this I couldn't tag the > incoming traffic as originating from BB1 and then match that tag outgoing > on the various interfaces to set the DSCP. > > The two ways it seems to me that this could work would be... > > 1. Mark the QOS on the stuff incoming from BB1 at an arbitrary value, match > that arbitrary value on the way out, and then set the correct value > > or > > 2. Looking at the subnets coming from BB1, use those as your match clauses > on the R1 outgoing interfaces and use those to set the DSCP. > > Now, number one up there seems risky because it's assuming you know all > DSCP values and your arbitrary value could potentially step on them. Plus, > you're setting values you weren't told to. Number two, which I'm guessing > would be the "correct" answer seems to be a matter of making some huge ass > assumptions. > > Are there more ways that anyone can suggest? What's the "correct" answer? > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com > > Are you a CCNP or CCIE and looking for a job? Check out > www.PlatinumPlacement.com > > http://onlinestudylist.com/mailman/listinfo/ccie_rs > _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com http://onlinestudylist.com/mailman/listinfo/ccie_rs
