On Tue, Oct 18, 2011 at 11:14 PM, Ben Dale <[email protected]> wrote: > Hi there, > > We are experiencing an issue caused by exactly this behaviour (Control > traffic from the RE being automatically marked as CoS 6), and I think the > current answer regarding changing the value is no. We are currently getting > around it by looping traffic back into the MX80 (using physical ports) in > order to strip 802.1p off transit traffic, which is an expensive hack to say > the least. >
I haven't tested this on an MX80 but on a MX960 (both DPC + MPC, running 10.4 irrc) if you use an egress lo0 firewall filter with a term with "then dscp #": 802.1p will inherit the value of the 3 most significant bits of the DSCP you have set. > When I get some more time in the lab I'll try using lt interfaces to do the > same. > > Cheers, > > Ben > > On 18/10/2011, at 9:40 PM, [email protected] wrote: > >> Hello, >> Is there a possibility to set the CoS (802.1p) value of return traffic from >> RE ? >> I know that You can do it for, at least , DSCP using: >> set class-of-service host-outbound traffic <dscp-code-point|forwarding-class) I couldn't say definitively but if I had to guess I'd say this would have the same effect as setting DSCP via egress firewall filter, i.e. 802.1p would inherit MSB values. >> Each time I send UDP echo probes to MX80 with different CoS values , the >> router responds with the same pattern 100(binary). The best workaround in >> this case would be to set CoS values according to the particular DSCP (which >> is preserved in this case). >> Thanks in advance for Your help! >> >> >> _______________________________________________ >> juniper-nsp mailing list [email protected] >> https://puck.nether.net/mailman/listinfo/juniper-nsp >> > > > _______________________________________________ > juniper-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/juniper-nsp > _______________________________________________ juniper-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/juniper-nsp
