Re: problem of packet loss with e100 machine with fedora core 4

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Bob Chiodini wrote:

On Thu, 2005-12-22 at 14:54 +0100, Eric Doutreleau wrote:
Bob Chiodini wrote:

On Thu, 2005-12-22 at 12:11 +0100, Eric Doutreleau wrote:


Tim wrote:

On Wed, 2005-12-21 at 16:11 +0100, Eric Doutreleau wrote:


i have a lab with fedora core 4 machine with a network card 01:08.0 Ethernet controller: Intel Corporation 82562EZ 10/100 Ethernet
Controller (rev 02)

and from time to time the network seems not working anymore.

after a few second the network goes up again.

The result is that i lose about 30% of packet.

when i boot windows on the same machine i have the same problem.
That does seem to suggest a hardware fault (a bad NIC, or the
combination of your motherboard and NIC).  Can you try a different one?



well i made a mistake with my sentence
i have no problem under windows
and i have 12 same computer and all have the problems with FC4

nevertheless thanks for your answer

Eric,

What does ethtool eth0 tell you about the interface?  Are you getting
any errors in /var/log/messages concerning eth0?

This sounds like an autonegotiation (duplex) problem.

Bob...



here is the result
Settings for eth0:
       Supported ports: [ TP MII ]
       Supported link modes:   10baseT/Half 10baseT/Full
                               100baseT/Half 100baseT/Full
       Supports auto-negotiation: Yes
       Advertised link modes:  10baseT/Half 10baseT/Full
                               100baseT/Half 100baseT/Full
       Advertised auto-negotiation: Yes
       Speed: 100Mb/s
       Duplex: Full
       Port: MII
       PHYAD: 1
       Transceiver: internal
       Auto-negotiation: on
       Supports Wake-on: g
       Wake-on: g
       Current message level: 0x00000007 (7)
       Link detected: yes

the only thing i got from messages concerning eth0 is theses messages

Dec 22 12:17:04 b02-07 kernel: e100: eth0: e100_probe: addr 0xfc000000, irq 11, MAC addr 00:0C:76:E5:E8:C8 Dec 22 12:17:08 b02-07 kernel: e100: eth0: e100_watchdog: link up, 100Mbps, full-duplex Dec 22 12:17:15 b02-07 ntpd[2459]: Listening on interface eth0, 157.159.15.231#123



Eric,

Presumably those messages are from a boot up?  Do you get the same ping
failures pinging something attached to the same switch?

Yes i have the same problems between machines from the same switch
i test between two linux machine and one machine under windows and the other
with linux

What does cat /proc/sys/net/ipv4/tcp_ecn return?  If it's not zero, set
it to zero echo 0 > /proc/sys/net/ipv4/tcp_ecn.

it s zero

I have no trouble pinging you at 157.159.15.226, 227, 228, 232, and 234.
Zero packet loss.  The others do not respond at all.


well as it s an open lab all the machine you told were rebooted under windows.

Do you get the same results using ping instead of fping?


i just try with ping and i got the following

94 packets transmitted, 58 received, 38% packet loss, time 93222ms
rtt min/avg/max/mdev = 0.247/0.271/0.294/0.017 ms, pipe 2

then same problem
the machine sporadicly stop to answer to the ping :(

thanks for your answer

Bob...

Bob...

Bob...






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