[AG-TECH] Linux networking problems
Robert Olson
olson at mcs.anl.gov
Wed Jul 25 11:44:58 CDT 2001
Wow, very cool find. I think this is worth making an RPM of and including
in the distribution...
--bob
At 11:39 AM 7/25/2001 -0500, Stuart Levy wrote:
>I've had this kind of problem too, where I seemed to need to
>force the 3c59x/3c90x drivers to a specific duplex setting
>to avoid catastrophic packet loss. It might have been the
>switch's fault, but how can I tell?
>
>You can compile the mii diag tools yourself under RH 6.2,
>and it might well be rewarding. I just tried fetching from:
> http://www.scyld.com/diag/
>
>which has instructions, and links to the necessary pieces:
> ftp://ftp.scyld.com/pub/diag/mii-diag.c
> ftp://ftp.scyld.com/pub/diag/libmii.c
>
>After fetching these, just say
> gcc -Wall -Wstrict-prototypes -O mii-diag.c -DLIBMII libmii.c -o mii-diag
>(quoting from the last couple lines of mii-diag.c) and then
>
> mii-diag -v -w
>
>will report the duplex, etc. status and -- better --
>watch for link state changes. I just saw a couple transitions
>when trying a 10MB TCP transfer:
> 11:26:43.869 MII BMSR now 1000: no link, NWay busy, No Jabber (41e1).
> 11:26:43.879 MII BMSR now 782d: Good link, NWay done, No Jabber (41e1).
>Unfortunately, I can't seem to replicate any problems right now --
>all the transfers I tried ran at about 11 MB/sec -- but maybe you can.
>
> Stuart Levy
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