[f-nsp] High LP CPU usage on MLXe-16

[Eldon Koyle]

Have you checked dm pstat to see what kind of traffic is hitting the CPU?
Just wondering if this is something related to the customer and not the
fact that the port was in a LAG.  We usually find that high lp CPU
utilization is caused by multicast issues in our environment.

dm pstat will show various packet counts per lp since the last run, I
usually ignore the first run.

-- 
Eldon Koyle


On Thu, Apr 12, 2018, 08:16 Alexander Shikoff <minotaur at crete.org.ua> wrote:

> Hello!
>
> I've run in strange issue on my MLXe-16: traffic on port which formerly
> had been in LACP LAG and was removed from it hits LP CPU.
>
> I have a LAG of 12 ports:
>
> === LAG "asw1-gdr-temp" ID 44 (dynamic Deployed) ===
> LAG Configuration:
>    Ports:         e 2/3 e 3/8 e 4/2 e 7/11 e 7/14 e 8/3 e 9/8 e 10/2 e
> 11/4 e 13/5 e 14/12 e 14/14
>    Port Count:    12
>    Primary Port:  2/3
>    Trunk Type:    hash-based
>
> I removed port eth 14/14 from LAG and assigned it to another customer,
> and now the traffic on it is being forwarded by LP CPU:
>
> telnet at lsr1-gdr.ki#show cpu-utilization lp
>
> 16:51:20 GMT+02 Thu Apr 12 2018
>
> SLOT  #:          LP CPU UTILIZATION in  %:
>                in 1 second:  in 5 seconds:  in 60 seconds: in 300 seconds:
>      1:        1             1              1               1
>      2:        1             1              1               1
>      3:        1             1              1               1
>      4:        1             1              1               1
>      5:        1             1              1               1
>      6:        1             1              1               1
>      7:        1             2              1               1
>      8:        1             1              1               1
>      9:        1             1              1               1
>     10:        1             1              1               1
>     11:        1             1              1               1
>     12:        2             3              2               2
>     13:        1             1              1               1
>     14:        21            22             17              16
>     15:        1             1              1               1
>     16:        1             1              1               1
>
> LACP LAG contains ports on mix of BR-MLX-10Gx20 and NI-MLX-10Gx8-D
> cards. Port 14/14 is on BR-MLX-10Gx20 card. A box runs IronWare ver.
> 5.9.00be.
>
> Did anyone run into the same issue? Is there a way to fix that without
> un-deploying LACP LAG?
>
> Thanks in advance!
>
> --
> MINO-RIPE
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