[c-nsp] C6880-X auto-neg

Tim Durack tdurack at gmail.com
Wed Jan 28 17:49:26 EST 2015

On Wednesday, January 28, 2015, Mark Tinka <mark.tinka at seacom.mu> wrote:

> On 28/1/15 22:29, Tim Durack wrote:
>> C6880-X supports 10/100/1G/10G/40G on all ports. However, it does not
>> allow
>> you to configure auto-10-100, auto-1000, or disabled auto-neg and
>> lock/speed duplex. Seems like a curious omission.
> Is this with a copper SFP?

Copper and fiber.

>> Following the standards for GigE and beyond, we run auto on our
>> facilities,
>> but we still run into "carriers" stuck in the 90s. This could be a pain.
> We standardize on auto-neg for all customers and peers.
> I used to have issues at $previous_job back in 2009, but since then (and
> at $current_job), we haven't come across any customers that weren't able to
> support auto-neg.
> Of course, this is one of those things where with enough customers
> on-board, you're bound to end up having to hard-code settings.
> Our 6880's are run as core switches - so only 10Gbps and a small set of
> 1Gbps links.
> Mark.
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