[plug] ppp ping problem

[Lindsay Allen]

Greetings,

Has anyone else come across this problem?  The packets do indeed go out at
1 second intervals, as verified by the modem lights, but arrive back in
bursts, typically 8-10 at a time.

This occurs at intervals of 2-4 weeks and usually resolves itself by the
modem dropping out.  I have seen it with different modems, different
kernels, different ppp versions and sometimes it has even involved a
Portmaster at the other end. 

elm:# ping fred
PING fred (192.168.2.1): 56 data bytes
64 bytes from 192.168.2.1: icmp_seq=0 ttl=255 time=6541.4 ms
64 bytes from 192.168.2.1: icmp_seq=1 ttl=255 time=5570.9 ms
64 bytes from 192.168.2.1: icmp_seq=2 ttl=255 time=4671.0 ms
64 bytes from 192.168.2.1: icmp_seq=3 ttl=255 time=3691.5 ms
64 bytes from 192.168.2.1: icmp_seq=4 ttl=255 time=2700.8 ms
64 bytes from 192.168.2.1: icmp_seq=5 ttl=255 time=1721.4 ms
64 bytes from 192.168.2.1: icmp_seq=6 ttl=255 time=731.3 ms
64 bytes from 192.168.2.1: icmp_seq=7 ttl=255 time=120.6 ms
64 bytes from 192.168.2.1: icmp_seq=8 ttl=255 time=7731.2 ms
64 bytes from 192.168.2.1: icmp_seq=9 ttl=255 time=6751.1 ms
64 bytes from 192.168.2.1: icmp_seq=10 ttl=255 time=5781.0 ms
64 bytes from 192.168.2.1: icmp_seq=11 ttl=255 time=4881.6 ms
64 bytes from 192.168.2.1: icmp_seq=12 ttl=255 time=3890.8 ms
64 bytes from 192.168.2.1: icmp_seq=13 ttl=255 time=2921.5 ms
64 bytes from 192.168.2.1: icmp_seq=14 ttl=255 time=1930.7 ms
64 bytes from 192.168.2.1: icmp_seq=15 ttl=255 time=941.3 ms
64 bytes from 192.168.2.1: icmp_seq=16 ttl=255 time=110.6 ms

Is this worthy of involving the Linux Heavyweights at linux-net?

Lindsay
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Lindsay Allen   <allen at cleo.murdoch.edu.au>  Perth, Western Australia
voice +61 8 9316 2486    32.0125S 115.8445E    vk6lj     Debian Linux
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