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

[Alexander Shikoff]

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