[c-nsp] Negotiation problem with Catalyst 2950 and Cisco 2821

[Wojtek Zlobicki]

You have already identified it as a duplex mismatch.  Have you tried to
hardcode the duplex and speed on both sides?

On 12/3/05, Ted Mittelstaedt <tedm at toybox.placo.com> wrote:
>
>
> Hi All,
>
>   I hae a stock 2821 router with 2 gig E ports on the inside,
> and 2 load-balanced t1's going to the Internet, running NAT.
> IOS version is 12.4.5
>
>   I have several 2950's don't know what version of firmware
> (probably old).
>
>   I plug the 2821 into the 2950s and set the 2821 and 2950 to
> autonegotiate speed and duplex.
>
>   The 2821 negotiates to 10 base T half duplex.  Users
> report problems with intermittent disconnects and slowness
> when surfing the web, etc.
>
>   I go to Goodwill, no less, and purchase a 10 year old 8
> port dumb hub, 10BaseT only.  Not a switch.  Cost is $7.99
>
>   I insert this hub between the 2821 and the Catalyst 2950.
>
>   Problems of disconnects and slowness go away.
>
> Speculation, anyone?
>
> Ted
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wojtek.zlobicki at gmail.com