From: Joseph D. Phillips (josephdphillips@fastmail.us)
Date: Sat Jul 17 2004 - 22:50:05 GMT-3
DId you disable auto-negotiation on both ends? Sometimes when you're
assigning and de-assigning the ports to VLANs you get those errors, too.
I always hard-code 10 mbps/half-duplex and reboot.
On Sat, 17 Jul 2004 21:33:55 -0400, trouse@cisco.com said:
> I saw something today the blew my mind and time. Guess I always take
> ethernet for granted. But today i was getting encapsulation failure on
> fastethernet. I had a ip addresss configure but it seems as if the didnt
> recognize it as connected, however it showed up connected in ip route.
> The "sh int fa 0/0" was up/up. CDP was showing neighbor but I could not
> pass ip traffic. I am still not sure how I fixed it but I had some stuff
> messed up on the 3550 with my VLAN setup. And after sorting all this
> out. Pings worked and encap failure went away. It was doing it on all
> my routers so I want to say it was the switch but....
>
>
> my question is: is there anyway the cat can cause the routers port to
> encap fail. I check the duplex/speed setting and all loooked find on
> both ends but it was auto negotiated. If this had been my real lab I
> think I would have cried. Spend over an hour before it finally started
> working and this was a timed MOCK lab from NM (CheckIt). so I was pretty
> disappointed and upset that my time was wasted. Could this had been a
> bug?
>
> Of couuse the interface was "no shut" since I was getting CDP over it and
> it saw the connected cat3550 switch.
>
> Thanks
> PUZZLED.....
>
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