[j-nsp] Strange RX issue w/ GE PIC

[Ricardo Tavares]

Have you tried the "show interfaces diagnostics optics" to check the power
levels?

Regards.


Ricardo.



On Mon, Aug 25, 2008 at 12:05 PM, Eric Van Tol <eric at atlantech.net> wrote:

> Hi all,
> I'm experiencing a strange RX issue on a link and I need some more ideas on
> where to look.  Two routers, an M7i and M20, are connected back-to-back,
> sort-of (there's optical gear between them, obviously), over a WDM link.
>  Ping tests work perfectly from one to the other, using various packet
> sizes.  When enabling traffic from the M7i to the M20 by lowering an OSPF
> metric, the link works fine.  When enabling traffic in the opposite
> direction, M20 to M7i, I begin to get massive input errors on the M20 GE
> PIC.  I see no errors at all on the M7i side, ever.  Errors only start to
> accrue when traffic reaches a certain as-yet-undetermined level, when
> bi-directional traffic is enabled.
>
> Done so far:
>  - Cleaned every connector in the path.
>  - Replaced both patch cables at either end of the link.
>  - Installed intermediary switch to rule out PIC/SFP problems.
>  - Failed over to redundant light path to rule out primary path problems.
>
> In what situation would one see input errors accrue on one side, but only
> when bi-directional traffic is enabled?
>
> Thanks,
> evt
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