Problem with FEC on CLLF

Problem with FEC on CLLF

[gopi krishna]

We have a cllf board with MII port(uses qs6612 phy).

If we connect this to our switch *through a
hub*(100mbps half duplex), everything is working fine.

If we connect this directly to the switch, both the
switch and the cllf show the link status to be up and
connected(100mbps, half duplex), but ping doesnt work.

We have noticed that the switch recieves the
packets(frames) that the cllf is sending on the fec
port,  the switch is sending some frames to the cllf
fec port, but cllf doesnt receive even a single frame.

Any pointers to the possible problem/solution?

gopi
Tejas Networks India Ltd
Phone +91-80-2267495,Extn: 4044


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Re: Problem with FEC on CLLF

[Michel Lanners]

On   3 Jan, this message from gopi krishna echoed through cyberspace:
> If we connect this to our switch *through a
> hub*(100mbps half duplex), everything is working fine.
>
> If we connect this directly to the switch, both the
> switch and the cllf show the link status to be up and
> connected(100mbps, half duplex), but ping doesnt work.
>
> We have noticed that the switch recieves the
> packets(frames) that the cllf is sending on the fec
> port,  the switch is sending some frames to the cllf
> fec port, but cllf doesnt receive even a single frame.
>
> Any pointers to the possible problem/solution?

I have seen things like that happen with bad cables. 100 Mb/s is very
sensitive to cable quality. Use a good, commercial-grade pre-built
cable, not homemade.

Michel

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