[j-nsp] RE : ALS on Juniper

[Alex]

You can simulate it with source MAC filtering: allow fake MAC in and deny 
everything else.
HTH
Rgds
Alex

----- Original Message ----- 
From: <david.roy at orange-ftgroup.com>
To: "Ben Dale" <bdale at comlinx.com.au>
Cc: <juniper-nsp at puck.nether.net>
Sent: Tuesday, June 28, 2011 5:39 PM
Subject: [j-nsp] RE : ALS on Juniper


Hi

thank you.

What I try to do is to simulate an unidirectionnal link failure (for OAM LFM 
tests). So I'm not sure that there is a way to disable ALS.

Regards
David


________________________________________
De : Ben Dale [bdale at comlinx.com.au]
Date d'envoi : mardi 28 juin 2011 12:46
À : ROY David DTF/DERX
Cc : juniper-nsp at puck.nether.net
Objet : Re: [j-nsp] ALS on Juniper

On 28/06/2011, at 7:24 PM, <david.roy at orange-ftgroup.com> 
<david.roy at orange-ftgroup.com> wrote:
> Do you know if Junos provides ALS (Automatic Laser Shutdown) configuration 
> ? Like Cisco 
> (http://www.cisco.com/en/US/docs/routers/7600/install_config/ES40_config_guide/es40_chap11.pdf)

I can only vouch for the EX platform, but in some testing I did a while back 
it would appear that yanking a single core from an SFP takes the transmitter 
down on both sides.  A log message is also generated that lets you know that 
RX has fallen below a certain threshold and the transmitter is being shut 
down.  No configuration is required to make this happen.

I suspect this would be reliant on you using Juniper "certified" optics 
though as you'd need digital diagnostics.

Ben
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