[c-nsp] forced up/up on a fiber link

[Damian Holdcroft]

Hi LM

I wonder if copper ports take advantage of the loopback circuitry to fake a
keepalive?

Either way, I would imagine a fibre port would not play ball. It would be a
potential hazard - a laser firing into air could damage some eyes. I
haven't seen a fibre port report link-up without something to participate.

Having said that, you could run a piece of fibre from the transmit to the
receive. You may need attenuators depending on what transceiver you're
using though.

Regards
On Oct 22, 2012 9:41 PM, "LM" <asturluismi at gmail.com> wrote:

> Hi all,
>
> For copper ethernet port I know there is an option to force up/up with "no
> keepalive"
>
> But, what about a fiber link?
> I have here a 7606 with...
> "Cisco 7600 Series SPA Interface Processor-400 Rev. 2.5"
> "5-port Gigabit Ethernet Shared Port Adapter"
>
>
> "no keepalive" command available under gi3/2/2, which it is a fiber port
> on the related cards I wrote before.
>
> Now, I need to test a config, and I need to force up/up to one port
> without a fiber connected, is it possible? how?
> I am still doing research but, not success so far.
>
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