[j-nsp] Setting CoS bits on ingress frames

Victor Sudakov vas at mpeks.tomsk.su
Wed Jun 17 01:58:33 EDT 2015


I hope I am not asking something unusual? I just want to classify
frames based solely on the ingress port and pass these frames out the
trunk ports keeping the CoS value. 

I have read about rewriting rules and classifiers, but would be really
grateful for a simple example.

Victor Sudakov wrote:
> Colleagues,
> I have the following configuration on some Cisco switches, e.g.
> interface GigabitEthernet0/10
>  switchport access vlan XXX
>  switchport mode access
>  mls qos cos 6
>  mls qos cos override
> !
> How do I do the same on a Juniper EX4200 switch, namely force a 802.1p
> CoS value on all ingress frames incoming via a certain access port
> and keep this value when these frames leave the EX4200 switch via a
> trunk port?
> I don't need to modify Juniper queues or anything sophisticated. I
> just need to classify frames and pass the classified frames to the
> communications equipment which understands CoS bits.
> Thank you in advance for any input.
> -- 
> Victor Sudakov,  VAS4-RIPE, VAS47-RIPN
> sip:sudakov at sibptus.tomsk.ru
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Victor Sudakov 
Tomsk, Russia
Russian Barefoot FAQ at http://www.barefooters.ru/barefoot.txt

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