Re: [uknof] 1Gbit/s Virgin Media Arcotronix single mode handoff

2013-08-17 Thread Will Hargrave

On 16 Aug 2013, at 21:48, Ben King b...@warwicknet.com wrote:

 Anyway come the install they deploy SM with LX SFPs, the link between
 the sites is up the link light is on on their end of the LX link to us
 but our end won't light - we are terminating into a 6500 SUP720-3B at
 each end.

Sounds like 1000Base-X autoneg. try toggling 'speed nonegotiate' / 'no speed 
nonegotiate'

 VM are now trying to argue that it's because it's too close, ie below
 LX minima link (2m patch lead). However we know their optics light
 when in our kit and while I know it's a bit short and ultimately it's
 probably shortening the life of the optics but fundamentally I think
 it should work.


Realistically there is no minimum distance for 1000LX, and you can sit there 
running with a 2m patch lead until the cows come home. Reference a BT Sinet 
document maybe? ;-)

-- 
Will Hargrave
+44 114 303 






Re: [uknof] 1Gbit/s Virgin Media Arcotronix single mode handoff

2013-08-17 Thread Ben King
Thanks Will,

Yup speed nonegotiate got one end up at least - so we are now half way there.



Sent from my iPhone

On 17 Aug 2013, at 07:56, Will Hargrave w...@harg.net wrote:


 On 16 Aug 2013, at 21:48, Ben King b...@warwicknet.com wrote:

 Anyway come the install they deploy SM with LX SFPs, the link between
 the sites is up the link light is on on their end of the LX link to us
 but our end won't light - we are terminating into a 6500 SUP720-3B at
 each end.

 Sounds like 1000Base-X autoneg. try toggling 'speed nonegotiate' / 'no speed 
 nonegotiate'

 VM are now trying to argue that it's because it's too close, ie below
 LX minima link (2m patch lead). However we know their optics light
 when in our kit and while I know it's a bit short and ultimately it's
 probably shortening the life of the optics but fundamentally I think
 it should work.


 Realistically there is no minimum distance for 1000LX, and you can sit there 
 running with a 2m patch lead until the cows come home. Reference a BT Sinet 
 document maybe? ;-)

 --
 Will Hargrave
 +44 114 303