massive number of dropped packets...

[Steve Holdoway]

Folks,

Can anyone think of a reason where I'm logging an immense number of
dropped packets on 2 ethernet ports - both on the motherboard - on a
server that's acting as a proxy server to a 10 user network? debian,

ifconfig eth0
eth0 Link encap:Ethernet HWaddr xx:xx:xx:a0:c4:c3
inet addr:10.1.1.2 Bcast:10.1.1.255 Mask:255.255.255.0
inet6 addr: fe80::21f:d0ff:fea0:c4c3/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:53417322 errors:0 dropped:124205286703352
overruns:0 frame:0
TX packets:42005561 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:48507271994 (45.1 GiB) TX bytes:11847953046 (11.0
GiB)
Interrupt:250 Base address:0xe000

ifconfig eth1
eth1 Link encap:Ethernet HWaddr xx:xx:xx:a0:c4:e2
inet addr:192.168.21.254 Bcast:192.168.21.255
Mask:255.255.255.0
inet6 addr: fe80::21f:d0ff:fea0:c4e2/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:288961494 errors:0 dropped:124206377650208
overruns:0 frame:0
TX packets:316127425 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:228816055646 (213.1 GiB) TX bytes:232074058838
(216.1 GiB)
Interrupt:249


The only one I can think of is that the mobo's about to fail...

Steve

[Bryan Baldwin]

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Post by Steve Holdoway
Can anyone think of a reason where I'm logging an immense number of
dropped packets on 2 ethernet ports - both on the motherboard - on a
server that's acting as a proxy server to a 10 user network?

* Try a different ethernet cable
->If that still drops packets---try a third cable
->If all three cables fail, try a different ethernet device
->repeat your test with all three cables
* Try another computer's ethernet on the same devices and cables

If only your original computer fails on both ethernet devices using all
three cords _then_ suspect your mobo.

If both computers fail, suspect your ethernet cables/devices ISP etc etc

Bryan
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[Steve Holdoway]

Post by Bryan Baldwin
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Post by Steve Holdoway
Can anyone think of a reason where I'm logging an immense number of
dropped packets on 2 ethernet ports - both on the motherboard - on a
server that's acting as a proxy server to a 10 user network?

* Try a different ethernet cable
->If that still drops packets---try a third cable
->If all three cables fail, try a different ethernet device
->repeat your test with all three cables
* Try another computer's ethernet on the same devices and cables
If only your original computer fails on both ethernet devices using all
three cords _then_ suspect your mobo.
If both computers fail, suspect your ethernet cables/devices ISP etc etc
Bryan

New kernel overwrite the built-from-source rtl8168 drivers, as using the
stock ( debian ) r8169 driver causes this problem!

I've now rebuilt from source for this kernel. Rebooting tonight should
clear everything up...

Note to self - if you go to the bother of making notes, why not read
them (:

Steve

[Peter Lambrechtsen]

tcpdump/snoop/wireshark may also be your friend here.

You could be getting a packet fragmentation issue depending on the router
you are going via, and may need to drop the MTU on that interface to 1280 or
some similar size depending on what devices it could be routed via.

Plus as has already been suggested swap the cables and router/switches.
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