[c-nsp] 6509 / 3750 link problem

[Dale Shaw]

Glenn,

On 4/9/07, Glenn Tan <glenn at intermedia.com.sg> wrote:
> Hi
>
> I am having a strange problem here...
> We're trying to connect to an uplink's Catalyst 3750 from one of our
> 6509 SUP720s via 1000base-LX over single-mode fiber and we are having
> this weird problem where our router shows the interface as down/down,
> whereas their router shows the interface as up/up.

Are you sure there's no physical (fibre) loopback somewhere? Is it a
simple fibre pair arrangement or are you through a circulator, WDM
etc. ?

Does the 3750 think there are any CDP neighbours? (itself?)

cheers,
Dale