[c-nsp] IEEE 802.1P QoS Issue........

Scott Miller fordlove at gmail.com
Mon Nov 2 16:10:54 EST 2015


Does the edge have the appropriate service policy in an outbound direction
to you applied?

What is the CPE?

On most CPE's, I prefer to apply the outbound service policy to the
physical interface - it acts like a catch-all for all outgoing traffic.
 (personal preference I guess)

You can verify you are receiving tagged traffic with a simple access-list,
and apply it in an inbound direction on your WAN interface.

access-list 199 permit ip any any dscp af41 log
access-list 199 permit ip any any
access-list 198 permit ip any any dscp af41 log
access-list 198 permit ip any any

-OR-

access-list 199 permit ip any any dscp 46 log
access-list 199 permit ip any any
access-list 198 permit ip any any dscp 46 log
access-list 198 permit ip any any

The apply each one in a different direction:

int g0/2
ip access-group 199 in
ip access-group 198 out

then "show access-list"

If you are receiving tagged traffic, the "inbound" access-list (199) will
increment.  So make a normal voice call, and after (or during) check the
access-list for hits.  If you are tagging traffic properly from within your
network, the outbound access-list will also increment.

Hope this helps in any way.

Scott

On Sun, Nov 1, 2015 at 8:10 PM, Methsri Wickramarathna <mmethw2003 at gmail.com
> wrote:

> Hi every one,
>
> I have purchased a fiber link and local ISP requested us to set Class of
> Service ( CoS ) value based on the precentage level Voice , Video ,
> Business Critical & Best effot. Further they have requested us to follow
> the IEEE 802.1p standard.
>
> I have configured the router interface with following configurations to set
> the CoS value to 5 of the data packets passing through interface.
>
> But when I analyzed the traffic ( using Wireshark ) from the destination ,
> I couldn't find relevant fields were confgiured. Appriciate if some one can
> help me to resolve this issue.
>
> *class-map match-all class-COS*
> * match access-group 100*
> *!*
> *policy-map policy_cos*
> * class class-COS*
> *  set cos 5*
> * class class-default*
> *  set cos 4*
>
> *interface GigabitEthernet0/2.17*
> * encapsulation dot1Q 107*
> * service-policy output policy_cos*
> *end*
>
> *Extended IP access list 100*
> *    10 permit ip any any (616731 matches)*
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