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problems with packets being dropped

Discussion in 'Tomato Firmware' started by ziddey, Feb 20, 2007.

  1. ziddey

    ziddey Network Guru Member

    First off, I'd like to say that tomato has been the best firmware I've used so far. Great work!

    I haven't had any crashes since it's been on. But I'm worrying that it might be related also to the problem I'm having.

    I haven't altered the default connection timeouts, and am having a lot of troubles with websites needing reloads to actually load. Also, I believe this is affecting my roommate's gaming on the ps3, with it occasionally not able to join or getting booted from games. Also, when I'm trying to do a file transfer, a lot of times it'll just keep on dying out and need to be retransferred. Each time something happens, I check the logs and see that connections are being dropped. However, when looking at the netfilter page, I see that I'm not near any of the set limits, so I don't understand why this is happening.

    edit: I usually don't track my active connections when something goes wrong so I'm not sure. But everytime I do check afterwards, it's usually in the 600's at the most. I've had errors when no one on the network was on p2p networks as well, so I'm not sure. Is there a simple way to set up a script to run when everytime it hits max connections to send out an email or something like that?

    edit: I was counting up the packets dropped (there's usually a splooge of them in a ten second period) and they might be adding up to the 2048 mark, although my calculations seem to indicate around 1400. With my buffalo, I'm never really seeing that high loads. That said, it shouldn't have too much of a hit on performance and load to the cpu if I raised it to something like 4096 right?
  2. GeeTek

    GeeTek Guest

    You can set connections for 4096 with no problem. You may also wish to shorten down the time-out values in conntrack. Somebody has a post in here that has some shortened values optimized for p2p. It should be in the sticky section. What type of QOS are you using ? Sounds like you may need to reduce the p2p traffic priority. Superb QOS functionality is one of Tomato's best features, and will make your internet performance seem like p2p is not even running when you get it set up properly. If you do have QOS enabled, that would explain why you see dropped packets. In addition to ACK delay, dropping packets is part of what QOS does to control speeds. (Somebody correct me if I'm wrong).

    Edit - It's interesting to see how many long time members of this website Tomato has brought out of the wood-work, self included !

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