OpenWrt Forum Archive

Topic: huge lags

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Post #1
felix
18 Oct 2007, 21:12

Hi,

For any reason, my internet connection begins to lag, if i play an online game.
It only stops, if I connect to the router (what takes really long) and reboot it.

# logread:

Oct 18 21:46:52 OpenWrt user.warn kernel: ip_conntrack: table full, dropping packet.
Oct 18 21:46:54 OpenWrt user.warn kernel: ip_conntrack: table full, dropping packet.
Oct 18 21:46:54 OpenWrt user.warn kernel: ip_conntrack: table full, dropping packet.
Oct 18 21:46:54 OpenWrt user.warn kernel: ip_conntrack: table full, dropping packet.
Oct 18 21:46:54 OpenWrt user.warn kernel: ip_conntrack: table full, dropping packet.
Oct 18 21:46:54 OpenWrt user.warn kernel: ip_conntrack: table full, dropping packet.
Oct 18 21:46:55 OpenWrt user.warn kernel: ip_conntrack: table full, dropping packet.
Oct 18 21:46:56 OpenWrt user.warn kernel: ip_conntrack: table full, dropping packet.
Oct 18 21:46:57 OpenWrt user.warn kernel: ip_conntrack: table full, dropping packet.
Oct 18 21:46:58 OpenWrt user.warn kernel: ip_conntrack: table full, dropping packet.
Oct 18 21:46:58 OpenWrt user.warn kernel: ip_conntrack: table full, dropping packet.
Oct 18 21:47:03 OpenWrt user.warn kernel: NET: 12 messages suppressed.
Oct 18 21:47:03 OpenWrt user.warn kernel: ip_conntrack: table full, dropping packet.
Oct 18 21:47:07 OpenWrt user.warn kernel: NET: 12 messages suppressed.
Oct 18 21:47:07 OpenWrt user.warn kernel: ip_conntrack: table full, dropping packet.
Oct 18 21:47:13 OpenWrt user.warn kernel: NET: 13 messages suppressed.
Oct 18 21:47:13 OpenWrt user.warn kernel: ip_conntrack: table full, dropping packet.
Oct 18 21:47:17 OpenWrt user.warn kernel: NET: 4 messages suppressed.
Oct 18 21:47:17 OpenWrt user.warn kernel: ip_conntrack: table full, dropping packet.
Oct 18 21:47:27 OpenWrt user.warn kernel: NET: 8 messages suppressed.
Oct 18 21:47:27 OpenWrt user.warn kernel: ip_conntrack: table full, dropping packet.
Oct 18 21:47:27 OpenWrt user.warn kernel: ip_conntrack: table full, dropping packet.
Oct 18 21:47:36 OpenWrt user.warn kernel: NET: 3 messages suppressed.
Oct 18 21:47:36 OpenWrt user.warn kernel: ip_conntrack: table full, dropping packet.
Oct 18 21:47:42 OpenWrt user.warn kernel: NET: 2 messages suppressed.
Oct 18 21:47:42 OpenWrt user.warn kernel: ip_conntrack: table full, dropping packet.
Oct 18 21:47:43 OpenWrt user.warn kernel: ip_conntrack: table full, dropping packet.
Oct 18 21:47:48 OpenWrt user.warn kernel: NET: 4 messages suppressed.
Oct 18 21:47:48 OpenWrt user.warn kernel: ip_conntrack: table full, dropping packet.
Oct 18 21:47:56 OpenWrt user.warn kernel: NET: 2 messages suppressed.
Oct 18 21:47:56 OpenWrt user.warn kernel: ip_conntrack: table full, dropping packet.
Oct 18 21:47:57 OpenWrt user.warn kernel: NET: 1 messages suppressed.
Oct 18 21:47:57 OpenWrt user.warn kernel: ip_conntrack: table full, dropping packet.
Oct 18 21:47:58 OpenWrt authpriv.info dropbear[489]: Child connection from 192.168.1.2:1085
Oct 18 21:48:02 OpenWrt user.warn kernel: NET: 6 messages suppressed.
Oct 18 21:48:02 OpenWrt user.warn kernel: ip_conntrack: table full, dropping packet.
Oct 18 21:48:10 OpenWrt user.warn kernel: NET: 3 messages suppressed.
Oct 18 21:48:10 OpenWrt user.warn kernel: ip_conntrack: table full, dropping packet.
Oct 18 21:48:15 OpenWrt user.warn kernel: NET: 3 messages suppressed.
Oct 18 21:48:15 OpenWrt user.warn kernel: ip_conntrack: table full, dropping packet.
Oct 18 21:48:18 OpenWrt user.warn kernel: NET: 3 messages suppressed.
Oct 18 21:48:18 OpenWrt user.warn kernel: ip_conntrack: table full, dropping packet.
Oct 18 21:48:25 OpenWrt user.warn kernel: NET: 5 messages suppressed.
Oct 18 21:48:25 OpenWrt user.warn kernel: ip_conntrack: table full, dropping packet.
Oct 18 21:48:27 OpenWrt user.warn kernel: NET: 5 messages suppressed.
Oct 18 21:48:27 OpenWrt user.warn kernel: ip_conntrack: table full, dropping packet.
Oct 18 21:48:28 OpenWrt authpriv.notice dropbear[489]: password auth succeeded for 'root' from 192.168.1.2:1085
Oct 18 21:48:33 OpenWrt user.warn kernel: NET: 8 messages suppressed.
Oct 18 21:48:33 OpenWrt user.warn kernel: ip_conntrack: table full, dropping packet.

Does someone know a way to fix this problem? What other informations do you need to be able to relate the problem?

Regards,
felix

(Last edited by felix on 18 Oct 2007, 21:13)

Post #2
alfred
19 Oct 2007, 04:36

You must have some p2p software running, big_smile
Try to reduce the ip_conntrack_tcp_timeout_established value(in secs, default is 432000 or somehing like that), I set it to 900 (15mins), it works fine.

You can edit /etc/sysctl.conf, add
ip_conntrack_tcp_timeout_established=yourvalue

Post #3
felix
19 Oct 2007, 15:18

Hi,
thanks for your answer. I don't have any p2p software running. Here the contents of my sysctl.conf:

kernel.panic=3
net.ipv4.conf.default.arp_ignore=1
net.ipv4.conf.all.arp_ignore=1
net.ipv4.ip_forward=1
net.ipv4.icmp_echo_ignore_broadcasts=1
net.ipv4.icmp_ignore_bogus_error_responses=1
net.ipv4.tcp_fin_timeout=30
net.ipv4.tcp_keepalive_time=120
net.ipv4.tcp_syncookies=1
net.ipv4.tcp_timestamps=0
net.ipv4.netfilter.ip_conntrack_tcp_timeout_established = 3600
net.ipv4.netfilter.ip_conntrack_udp_timeout = 60
net.ipv4.netfilter.ip_conntrack_udp_timeout_stream = 180

net.ipv4.ip_conntrack_max = 5953
net.ipv4.netfilter.ip_conntrack_max = 5953
net.ipv4.tcp_westwood=1
# don't cache ssthresh from previous connection
net.ipv4.tcp_no_metrics_save = 1
# recommended to increase this for 1000 BT or higher
net.core.netdev_max_backlog = 2500

what exactly does "net.ipv4.netfilter.ip_conntrack_tcp_timeout_established"?

Regards,
felix

(Last edited by felix on 19 Oct 2007, 15:20)

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