[c-nsp] ASR9k QoS Scale/Usage Query

[R Maha]

Hi Robert,

In my case, below output is giving me the number of policers utilised:

*SUMMARY per NP:*
*  =========================*
*   Policy Instances: Ingress 7357 Egress 7336  Total: 14693*

* CLIENT : QoS-EA*
*   Policy Instances: Ingress 7324 Egress 7314  Total: 14638*

By means of your output, it seems it is using 37 Ingress and 14 Egress as
total of 51.

<snip>
SUMMARY per NP:
  =========================
   Policy Instances: Ingress 37 Egress 14  Total: 51

Please confirm if that is true.


Regards,
Rajendra

On Tue, Mar 14, 2017 at 2:01 PM, Robert Williams <Robert at custodiandc.com>
wrote:

> Hi Rajendra,
>
> > These sites would be helpful to you on understanding QoS.
> >
> *https://supportforums.cisco.com/document/59901/asr9000xr-understanding-qos-default-marking-behavior-and-troubleshooting*
> <https://supportforums.cisco.com/document/59901/asr9000xr-understanding-qos-default-marking-behavior-and-troubleshooting>
> > *https://null.53bits.co.uk/index.php?page=asr9000-lag*
> <https://null.53bits.co.uk/index.php?page=asr9000-lag>
> >
> *http://www.alcatron.net/Cisco%20Live%202014%20Melbourne/Cisco%20Live%20Content/Service%20Provider/BRKSPG-2904%20%20ASR-9000%20IOS-XR%20Hardware%20Architecture,%20QOS,%20EVC,%20IOS-XR%20Configuration%20and%20Troubleshooting.pdf*
> <http://www.alcatron.net/Cisco%20Live%202014%20Melbourne/Cisco%20Live%20Content/Service%20Provider/BRKSPG-2904%20%20ASR-9000%20IOS-XR%20Hardware%20Architecture,%20QOS,%20EVC,%20IOS-XR%20Configuration%20and%20Troubleshooting.pdf>
> > Are you referring to this command:
> > show qoshal resource summary [np <np>]
>
>
> Thanks for that, I was familiar with that command but I appear to be
> lacking some required information in order to use the output from it to get
> what I am looking for.
>
> At a high level – I essentially need to know (or be able to calculate)
> what percentage* of hardware resources are being consumed by the current
> policies being used.
>
> ****I appreciate that this is **going** to be a figure ‘per NP’ and**/or**
> ‘per LC’ but regardless I need to know so that we can plan expansion.*
>
> The command you shared specifically, gives output along these lines (on a
> random LC here):
>
> <snip>
> SUMMARY per NP:
>   =========================
>    Policy Instances: Ingress 37 Egress 14  Total: 51
>    Entities: (L4 level: Queues)
>      Level        Chunk 0           Chunk 1           Chunk 2
> Chunk 3
>      L4        78(   78/   78)   14(   14/   14)   22(   22/   22)   20(
> 20/   20)
>      L3(8Q)    19(   19/   19)    3(    3/    3)    6(    6/    6)
> 6(    6/    6)
>      L3(16Q)    0(    0/    0)    0(    0/    0)    0(    0/    0)
> 0(    0/    0)
>      L2         7(    7/    7)    2(    2/    2)    4(    4/    4)
> 4(    4/    4)
>      L1        16(   16/   16)    0(    0/    0)    0(    0/    0)
> 0(    0/    0)
>    Groups:
>      Level        Chunk 0           Chunk 1           Chunk 2
> Chunk 3
>      L4        19(   19/   19)    3(    3/    3)    6(    6/    6)
> 6(    6/    6)
>      L3(8Q)     9(    9/    9)    2(    2/    2)    4(    4/    4)
> 4(    4/    4)
>      L3(16Q)    0(    0/    0)    0(    0/    0)    0(    0/    0)
> 0(    0/    0)
>      L2         7(    7/    7)    2(    2/    2)    4(    4/    4)
> 4(    4/    4)
>      L1        16(   16/   16)    0(    0/    0)    0(    0/    0)
> 0(    0/    0)
>    Policers: Internal 658(658) Regular 252(252)  Parent 0(0) Child 0(0)
> Total 910(910)
>
>    PROFILES:
>       WFQ:
>        Level         Chunk 0         Chunk 1         Chunk 2         Chunk
> 3
>         L4  254( 254/    78)  254( 254/    14)  254( 254/    22)  254(
> 254/    20)
>         L3  256( 256/    19)  256( 256/     3)  256( 256/     6)  256(
> 256/     6)
>         L2  256( 256/     7)  256( 256/     2)  256( 256/     4)  256(
> 256/     4)
>         L1   64(  64/    12)    0(   0/     0)    0(   0/     0)    0(
> 0/     0)
> <snip>
>
> However, I have no reference point for what the ‘maximum’ would be for any
> of those values (or more specifically, I’m not aware what the maximums are).
>
> Take this output for example:
>
> #show qos capability location 0/0/cpu0
> Tue Mar 14 08:02:14.088 GMT
> Capability Information:
> ======================
> <snip>
> Max Policy maps supported on this LC: 16384
> Max classes per child-policy: 1024
> Max classes per policy: 1024
> <snip>
>
> It shows the limitations of this LC which is good, but I cannot find where
> to get the ‘current usage’ in the same context as the maximums listed here.
>
> So something like ‘number of policy maps currently active on the LC’ or
> ‘number of classes per policy’. Without actually walking through the
> configurations on all ports and cards manually of course.
>
> I’m reasonably familiar with the actual operation of QoS on the chassis
> (and in general) – in reality it is the complexity and size of our QoS
> structure which has led to the need for us to accurately quantify the
> hardware usage levels.
>
> If you have any additional input I’d very much appreciate it!
>
> Best wishes & thanks,
>
>
> Robert Williams
> Custodian Data Centre
> Email: Robert at CustodianDC.com
> http://www.CustodianDC.com
>
>
>
>
>