[c-nsp] 4507R-E loosing config

[Peter Rathlev]

On Thu, 2008-11-13 at 23:06 +0100, Sebastian Ganschow wrote:
> If a remove one Supervisor Engine in the first 4507, the Port-Channel
> only contains interface Te4/1.
> 
> If I put the removed Engine back, Interface Te3/1 comes back without
> any configuration.
> 
> As a result, all vlans are send over this Link, the other switch
> detects an configuration mismatch an both interfaces are in
> err-disabled mode.
> 
> Any thougts on this?

Maybe running LACP on the link ("channel-group 1 mode active") could
help avoid the err-disable part. As far as I understand, you would end
up with a one-member port-channel on each side, and then a standalone
"I" port (independent) on the unchanged side facing a regular switchport
on the "supervisor challenged" side. Spanning tree blocks one of the
paths.

I haven't tested this, just guessing.

This doesn't solve the interface config going missing of course.

Regards,
Peter