RE: packet loss after Lenny Squeeze upgrade
Hi,
We have pinned it down even further.
Problem server has multiple nic. Test server is connected to eth0 of problem server.
Using the test server:
Ping the switch to which the problem server is connected and I have no packet loss.
Ping the ip for eth0 and I have no packet loss.
Ping the ip for eth1 and I DO have packet loss.
Seems it is going wrong somewhere after the packet has arrived on the server and gets lost in routing or something like it.
The eth0 NIC uses the Trigon3 driver. Others use the Trigon3 or the Intel Pro 1000 driver.
I cannot just remove the firewall as it is needed for the correct function of the server, it's function is to be a router/firewall.
Switch logs show nothing wrong. Ethernet port speeds/duplex settings have been checked and are ok.
Pinging other machines on the network from the test server shows no packet loss so it seems it is not a network problem but realy a problem on that server itself.
Yours sincerely,
Bonno Bloksma
senior systemadministrator
tio
university of applied sciences
-----Oorspronkelijk bericht-----
Van: frank [mailto:frank@dead-link.org]
Verzonden: donderdag 22 maart 2012 8:02
Aan: debian-user@lists.debian.org
Onderwerp: RE: packet loss after Lenny Squeeze upgrade
On Wed, 2012-03-21 at 16:00 +0000, Bonno Bloksma wrote:
> What do you mean with WHERE the loss happens? I know what do to at the "normal" level where I write iptable firewall rules, interfaces files, routing rules but I do not know what to do at the network stack level.
How have you verified that this host is the reason? What reports traceroute or better mtr?
Do you have still packet loss if you completely disable the firewall?
How does it looks like if you ping from box itself? I assume it's a switched network, anything in the switch logfile?
What network driver is loaded and what kernel is used? Have you tried to boot an older kernel?
> All I know right now is when I send pings to the server from another
> server I get 1-5% packet loss. :-(
How many hops are between the host you have pinged from?
Frank
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