When saturating the connection (a V.90 connection,say by downloading
a news active file), if I issue a ping, I get lots of messages about
byte 8 not being correct:
$ ping iwvisp.com
PING iwvisp.com (207.141.203.5) from 207.141.203.99 : 56 data bytes
64 bytes from 207.141.203.5: icmp_seq=0 ttl=198 time=676.7 ms
64 bytes from 207.141.203.5: icmp_seq=1 ttl=198 time=199.8 ms
64 bytes from 207.141.203.5: icmp_seq=2 ttl=198 time=1430.4 ms
wrong data byte #8 should be 0x53 but was 0x52
52 81 bc 37 6e 94 6 0 8 9 a b c d e f 10 11 12 13 14 15 16 17 18 19 1a 1b 1c 1d 1e 1f
20 21 22 23 24 25 26 27 28 29 2a 2b 2c 2d 2e 2f
64 bytes from 207.141.203.5: icmp_seq=3 ttl=198 time=1280.1 ms
wrong data byte #8 should be 0x54 but was 0x53
53 81 bc 37 81 95 6 0 8 9 a b c d e f 10 11 12 13 14 15 16 17 18 19 1a 1b 1c 1d 1e 1f
20 21 22 23 24 25 26 27 28 29 2a 2b 2c 2d 2e 2f
64 bytes from 207.141.203.5: icmp_seq=4 ttl=198 time=1459.5 ms
wrong data byte #8 should be 0x55 but was 0x54
54 81 bc 37 2f 97 6 0 8 9 a b c d e f 10 11 12 13 14 15 16 17 18 19 1a 1b 1c 1d 1e 1f
20 21 22 23 24 25 26 27 28 29 2a 2b 2c 2d 2e 2f
64 bytes from 207.141.203.5: icmp_seq=5 ttl=198 time=1149.4 ms
wrong data byte #8 should be 0x56 but was 0x55
55 81 bc 37 79 99 6 0 8 9 a b c d e f 10 11 12 13 14 15 16 17 18 19 1a 1b 1c 1d 1e 1f
20 21 22 23 24 25 26 27 28 29 2a 2b 2c 2d 2e 2f
64 bytes from 207.141.203.5: icmp_seq=6 ttl=198 time=309.6 ms
64 bytes from 207.141.203.5: icmp_seq=7 ttl=198 time=444.2 ms
64 bytes from 207.141.203.5: icmp_seq=8 ttl=198 time=150.2 ms
64 bytes from 207.141.203.5: icmp_seq=9 ttl=198 time=140.2 ms
I don't believe that this is a flow control problem, since it's always
byte 8. Also, "ifconfig ppp0" doesn't report any errors. I don't get this
problem when the only thing going over the connection is a ping.
Secondly, if I start two simultaneous ftp downloads, the ppp
connection will appear to hang. I can see by the TX light on my modem
that packets are being sent, and by the RX light that packets are
coming back, but "ifconfig ppp0" reports RX and frame errors on every
packet.
I can completely reproduce these problems. How do I begin to debug
them?
-- Forte International, P.O. Box 1412, Ridgecrest, CA 93556-1412 Ronald Cole <ronald@forte-intl.com> Phone: (760) 499-9142 President, CEO Fax: (760) 499-9152 My PGP fingerprint: 15 6E C7 91 5F AF 17 C4 24 93 CB 6B EB 38 B5 E5- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/