I can turn off auto negotiation on a fiber/Gig interface on a 3825 router by the command:
no negotiation auto
What does this buy me as in any case it will be full / 1000? What kind of (negotiation) traffic should I see with negotiation turned on on the router?
I'm troubleshooting an issue where the link between a 3825 router and a 6509 switch works fine with negotiation on on router and turned off on switch. When I put an IPS in line between the router and switch, link fails. IPS is configured with negotiation off.