Can you provide some more detail on your network configuration? I'm unclear if the linux server is your internet router or just another client computer on your local LAN, where the test pings to "the internet" are going (i.e. nexthop router, etc.), and if/where CIPE tunnels are involved in the equation. Perhaps a small network map would be helpful. I'm also unclear about the pings that you've tried. After you've shown the network map, perhaps you can identify the two machines (and interfaces) involved in each of the different ping tests you've performed. I had a similar problem recently. A linux-based router with four interfaces serving three local LANs and a T-1 (via the provider's router) to the internet. The router was forwarding traffic between all combinations of networks (that were allowed by rule) correctly, except between LANs 1 and 2. In this case, pings would vary much as in your case. Interestingly, it turned out to be bad hardware. Moved the boot media to an identically configured machine and the problem went away. Returned the boot media to the original machine and the problem returned. On Wednesday 07 January 2004 02:26 pm, ArtÅras Ålajus wrote: > Hello, > > I've got this problem. There is an linux server with 2.4.24 kernel > and pinging from him to internet (or from lan) ping randomly jumps up: > > 64 bytes from fortas.ktu.lt (193.219.160.131): icmp_seq=387 ttl=59 > time=30.0 ms 64 bytes from fortas.ktu.lt (193.219.160.131): icmp_seq=388 > ttl=59 time=32.6 ms 64 bytes from fortas.ktu.lt (193.219.160.131): > icmp_seq=389 ttl=59 time=34.9 ms 64 bytes from fortas.ktu.lt > (193.219.160.131): icmp_seq=390 ttl=59 time=198 ms 64 bytes from > fortas.ktu.lt (193.219.160.131): icmp_seq=391 ttl=59 time=407 ms 64 bytes > from fortas.ktu.lt (193.219.160.131): icmp_seq=392 ttl=59 time=407 ms 64 > bytes from fortas.ktu.lt (193.219.160.131): icmp_seq=393 ttl=59 time=430 ms > 64 bytes from fortas.ktu.lt (193.219.160.131): icmp_seq=394 ttl=59 > time=30.9 ms 64 bytes from fortas.ktu.lt (193.219.160.131): icmp_seq=395 > ttl=59 time=31.6 ms > > Internet line isn't loaded up, server load fine. QOS isn't used, qdiscs > default. I don't realize what the problem is and even how to debug it. > Sysctl config: net/ipv4/ip_forward = 1 > net/ipv4/icmp_ignore_bogus_error_responses = 1 > net/ipv4/icmp_echo_ignore_broadcasts = 1 > net/ipv4/tcp_syncookies = 1 > net/ipv4/tcp_timestamps = 0 > net/ipv4/tcp_window_scaling = 0 > net/ipv4/tcp_sack = 0 > net/ipv4/tcp_fin_timeout = 30 > net/ipv4/tcp_keepalive_time = 1800 > net/ipv4/tcp_low_latency = 1 > > Thanks for any thoughts. > > > _______________________________________________ > LARTC mailing list / LARTC@xxxxxxxxxxxxxxx > http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/ _______________________________________________ LARTC mailing list / LARTC@xxxxxxxxxxxxxxx http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/
