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From time to time, my network shows some poor performance. My 64 bit Arch Linux box is connected with a wireless connections with a RaLink RT2561/RT61 802.11g PCI, the system is up-to-date. The symptoms are:
* Looking up a website takes very long, or it will never load at all. Only in Chromium snapshot, Firefox loads the same page instantly at the same time.
* Kopete is unable to keep a connection with either MSN or my Jabber accounts. They simply time out.
* SSH connections drop dead (or are interrupted for minutes). No high traffic involved at all.
* tcpdump shows strange messages like
12:09:37.134509 00:30:3f:50:19:e5 (oui Unknown) > 00:18:f8:45:10:c3 (oui Unknown), ethertype Unknown (0x05ec), length 1530Unsure whether that is related. But quite often I see this kind of traffic when I'm seeing these symptoms.
The problem does not always occur, there are times where I have a good connection, but sometimes the symptoms above occur. I suspected it had something to do with IPv6, but disabling it did not have any effect. I don't think it's interference either, the connection to the router is quite healthy: normal response time, 0% packet loss.
I also have a laptop with 32 bit Arch Linux installed, using the Atheros wireless drivers. It also runs Chromium and doesn't show any problems whatsoever, on the same network.
Could it be a driver issue? I'm tending to think that is the case, actually. Any other hints are very appreciated.
Last edited by bram85 (2010-04-23 21:00:40)
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Having the same problem still. I discovered when I ping from another machine within the same network, I see a packet loss of ~75% (they simply don't appear on the network interface). When I ping from the 'broken' machine to that other machine, I see 0% packet loss.
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Appears to be solved now. From kernel 2.6.32 and later I haven't seen these symptoms anymore. Make sure not to use the first versions of the 2.32.x series due to a nasty power saving bug, everything after that is fine.
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