hello indeed, a fellow nanoger gave me this hint.
1. i had to enable mls qos globally in "network" switches 2. set the mls qos trust dscp on the uplinks (ingress port) thanks ps thanks to andrey.gordon too :) On 11/12/2009 03:21 PM, Brian Feeny wrote: > > You should make sure that any links that go between devices have trust > set. In your case if your doing DSCP, > then make sure each link that goes between devices which must carry > tagged packets have trust dscp set. > > Brian > > On Nov 12, 2009, at 5:11 AM, Bogdan wrote: > >> hello >> >> i am playing with qos on some devices >> - cisco 3560 >> - cisco 7609 >> and i have some things that i don't seem to understand. >> >> 1. in 3560, i enable mls qos, on the ingress port applyed policy map, >> classify the packets with acl, mark, all good. on the egress ports i use >> srr-queue with shape/share, everything is fine, it is working. >> >> http://www.cisco.com/en/US/docs/switches/lan/catalyst3560/software/release/12.2_20_se/configuration/guide/swqos.html#wp1028614 >> >> >> >> 2. reset to defaults the 3560 >> in 7606 i pick up a vlan, and apply a policy-map and set dscp 40 on >> egress of that vlan >> 3560 in uplinked in 7609 >> in 3560 i can see the "marked" packets, and i have matches on the dscp >> set earlier (sh mls qos int xx stat). >> the problem is: when i apply the srr-queue in 3560 on egress (towards >> the test port), it does not work. >> if i enable mls qos on 3560, i cannot match anymore the dscp 40 from the >> 7609 >> >> is it normal? do i have to apply the qos stuff (point1) on all switches >> i want qos on? i mean, i cannot set dscp in one "core" device and use >> that in the whole network ? >> >> >> thanks >> >> > >
