[c-nsp] disabling GigE negotiation on NX-OS

[Gert Doering]

Hi,

On Fri, Apr 15, 2011 at 07:48:20PM -0400, Keegan Holley wrote:
> I don't think fiber negotiates.  

It does, and that's what "set port negotiation enable/disable" turns
on/off on CatOS. 

As far as I understand, it negotiates flow control and duplex (which is
a bit weird as the only duplex option is full-duplex anyway), but most 
important, it will make sure that the link is operating in both directions 
- with negotiation turned off, you can have unidirectional links if one 
fiber is broken.  With negotiation on, both sides will notice.

It seems to be extremely hard to find information about *fiber* link
negotiation, though.  Googling turns up lots of stuff about copper,
but that's different.

> It isn't usually capable of anything but gig-full.  Are you sure the 
> carrier is using 1g fiber.  

It's currently connected to a GigE port on a Cat4507 and working well - 
so, yes, I'm sure of that :-)

gert
-- 
USENET is *not* the non-clickable part of WWW!
                                                           //www.muc.de/~gert/
Gert Doering - Munich, Germany                             gert at greenie.muc.de
fax: +49-89-35655025                        gert at net.informatik.tu-muenchen.de
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 305 bytes
Desc: not available
URL: <https://puck.nether.net/pipermail/cisco-nsp/attachments/20110416/fd1f420f/attachment.pgp>