From: Ken (cciecn@xxxxxxxxx)
Date: Sat Jan 08 2000 - 04:48:34 GMT-3
It is weired, because I remember one guy claimed
seeing this in the lab and was told it was a config
problem.
still do not understand it, i think the up/up is
refering for the lay2, why a lay3 protocol can bring
it down, of couse, your lad proofed it, I just want
to dig a bit more.
Ken
--- Dawit Birhanu <dawit@lis.pitt.edu> wrote:
>
> Hi,
>
> Finally, I managed to resolve the problem. The
> problem was with the RJ-45
> connectors. What I did was as follows:
>
> 1. I removed AppleTalk from the FastEthernet
> interface of both
> routers, leaving only IP protocol.
> 2. Then I entered shut and then no shut on the FE
> interfaces -- now both FE
> interfaces are in up/up state. Cleared the
> interface stat. And
> generated traffic accross the link.
>
> 3. When I checked the interface using "show int fast
> 0/1", it showed
> significant level of output/input errors.
> However, this error level
> was tolerated by IP, and the interfaces stayed
> up/up.
>
> 4. I removed the cable and retested it using a cable
> tester. The tester
> showed that cable is fine.
>
> 5. It turned out that there was loose connection
> which makes the cable look
> good to the tester and performed poorly when used
> to connect the two
> routers.
>
> 6. Then we removed the loose connector and attached
> another connector. We
> reconfigured AppleTalk EIGRP. This time it
> worked.
>
>
> I think what happend is as follows:
>
> AppleTalk is not as tolerant to input/output error
> as is IP. Moreover,
> when AppleTalk detects an unacceptable level of
> error, it tells the
> interface to go down rendering it unavailable to
> other protocols such as
> IP. This, I think, is a violation of the OSI model.
> When AppleTalk,
> declares a link (or interface) to be unacceptable,
> it shouldn't interfer
> with other protocols' decision and declare the
> interface unacceptable for
> all protocols. Some protocols are designed to
> tolerate higher error rate.
>
>
> Dawit
>
>
> On Thu, 6 Jan 2000 Pramod.Daptardar@sita.int wrote:
>
> > Hi
> >
> > Can you try half-duplex or full-duplex command on
> Both fast ethernet
> > interfaces or alternatively
> > observe output of show int fastethernet , to see
> if both interfaces are in
> > same duplex mode.
> >
> > Regards
> >
> > Pramod
> >
>
This archive was generated by hypermail 2.1.4 : Thu Jun 13 2002 - 08:22:43 GMT-3