High packet loss :-(

Grant orbman at thingysrealm.myftp.org
Tue May 25 15:56:27 BST 2004


Hi,

was reading about stress testing networks... so i thought i would try 
mine out, every single box passed (0% loss) apart from  my freebsd 4.9 
box...

<output>
ping -f 192.168.254.1

PING 192.168.254.1 (192.168.254.1) 56(84) bytes of data.
....................................................
--- 192.168.254.1 ping statistics ---
1445 packets transmitted, 1200 received, 16% packet loss, time 5774ms
rtt min/avg/max/mdev = 0.198/0.600/22.715/2.413 ms, pipe 2, ipg/ewma 
3.999/0.229 ms

#
<end output>

the pc has two network cards in, one set with ip 
192.168.254.1/255.255.255.0 and the other set to 10.0.0.222/255.0.0.0

they were setup like that so that the 192.168.254.1 is for hosting my 
website and mail server to the internet and the 10.0.0.222 was for 
internal, use like for storage.

no matter which ip i ping from to that box i still get lost packets, i 
have changed the cables to be sure, but yet i still get packet loss, but 
i have noticed on the local console i get this:

arp: 10.0.0.2 is on dc0 but got reply from 00:02:a5:3f:3a:6c on xl0
arp: 10.0.0.2 is on dc0 but got reply from 00:02:a5:3f:3a:6c on xl0
arp: 192.168.254.200 is on xl0 but got reply from 00:08:c7:3b:67:93 on dc0

i get quite a few of these during a day... any ideas??

the cards are:

192.168.254.1 = 3Com 3c905C-TX Fast Etherlink XL

10.0.0.222 = Accton EN2242 MiniPCI 10/100BaseTX

is there something wrong with the server hardware? or is it something in 
freebsd that is stopping it?

Any help greatful.
Thanks
Grant.

Ps = sorry for the long post







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