[c-nsp] Cisco 7600/RSP720 high fabric channel utilization

[Валерий Н. Лутошкин]

Hi,

I have two identical 7609 with RSP720-3CXL-10G.

"show platform hardware capacity fabric" command on any of 7609 gives me a similar output:

  Fabric utilization:     Ingress                    Egress
    Module  Chanl  Speed  rate  peak                 rate  peak
    1       0        20G   63%   70% @22:41 29Oct17   35%   51% @20:35 15Oct17
    1       1        20G   24%   39% @21:25 29Sep16   41%   59% @21:17 21Dec16
    2       0        20G   18%   37% @21:34 16Sep17   53%   69% @21:33 16Sep17
    2       1        20G   33%   57% @03:21 14Oct17   77%   90% @20:32 27Oct17
    3       0        20G   66%   97% @03:22 14Oct17   47%   67% @20:32 06Jul17
    3       1        20G   59%   98% @11:21 04Aug17   31%   84% @20:42 01Feb17
    5       0        20G   71%   89% @21:54 20Oct17   83%   98% @22:24 29Oct17
    5       1        20G    0%    4% @10:45 17Jan17    0%   30% @10:03 25Jul16

I wonder why the RSP uses only one channel as fabric connection.
As you can see, it was overloaded (98% - it is overloading) yesterday. 

Is there any way to balance traffic between two fabric channels?

Best regards,
Valery Lutoshkin