[f-nsp] Impact of disabling SFM modules on MLX

[Martin Pels]

Hi Chris,

On Fri, 12 Apr 2013 12:27:03 +0200
Chris Hellkvist <chris.hellkvist at googlemail.com> wrote:

> Hi,
> 
> currently i have a SFM module in a MLX 4e showing strange errors (FE
> Access failure detected on SNM 1/FE 1) in the log, also the SFM
> utilization looks a bit unhealthy:
>  SFM#1
> ----------+-----------+---------+-----------+---------
> last 1 second  utilization = 1494.3%
> last 5 seconds utilization = 1494.3%
> last 1 minute  utilization = 1494.3%
> last 5 minutes utilization = 1493.4%
> 
> I have a SR with Brocade and they suggested to disable SFM1 and
> created a RMA for the module. However they were not really able to
> tell me what impact a power-off of SFM1 has on the traffic flowing
> trough the device (both routed and switched).
> 
> Has someone on the list experience with disabling SFM modules? Is this
> causing any impact on the network or is this fully transparent?

This can be done without impact, provided you have enough additional SFMs
installed to handle the traffic load.

Kind regards,
Martin