2.2.12 ping off by one...

Mike A. Harris (mharris@meteng.on.ca)
Mon, 18 Oct 1999 03:31:08 -0400 (EDT)


After about a day of uptime using 2.2.12 *WITH* patch applied to
fix kernel bug - from AC, we noticed a slowdown in networking.
DNS queries then started failing slowly. I did a ping, and got
what follows below... If you look at the error messages, it
shows that the wrong data that is received is off by one in every
case. It is one less than it should be.

This could be caused by the remote OS, or perhaps by some machine
in the middle, however I suspect that it is in fact my Linux
machine hosing something along the way.

Is this a known bug? I am *NOT* using VMware, nor have I had the
modules loaded at all this time before someone asks. I say that
just so that I don't get ignored under assumptions.

I know 2.2.12 has bugs, and I believe I've got all patches
applied. I'm using a kernel compiled with egcs - the one that
comes with RedHat 6.0.

Please let me know if this is a known thing that is fixed
allready, or if more info is needed, or if I should take a long
walk off a short dock...

Here is the ping:

PING f2.mail.yahoo.com (128.11.68.132) from 206.248.78.1 : 56 data bytes
64 bytes from 128.11.68.132: icmp_seq=1 ttl=235 time=750.1 ms
64 bytes from 128.11.68.132: icmp_seq=2 ttl=235 time=750.0 ms
64 bytes from 128.11.68.132: icmp_seq=3 ttl=235 time=990.3 ms
64 bytes from 128.11.68.132: icmp_seq=4 ttl=235 time=570.4 ms
64 bytes from 128.11.68.132: icmp_seq=5 ttl=235 time=820.0 ms
64 bytes from 128.11.68.132: icmp_seq=6 ttl=235 time=860.0 ms
64 bytes from 128.11.68.132: icmp_seq=7 ttl=235 time=1090.0 ms
wrong data byte #8 should be 0xdb but was 0xda
da 85 a 38 9 d1 3 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 128.11.68.132: icmp_seq=9 ttl=235 time=410.0 ms
64 bytes from 128.11.68.132: icmp_seq=10 ttl=235 time=850.0 ms
64 bytes from 128.11.68.132: icmp_seq=12 ttl=235 time=1120.0 ms
wrong data byte #8 should be 0xe0 but was 0xdf
df 85 a 38 e d1 3 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 128.11.68.132: icmp_seq=15 ttl=235 time=730.0 ms
64 bytes from 128.11.68.132: icmp_seq=16 ttl=235 time=590.0 ms
64 bytes from 128.11.68.132: icmp_seq=17 ttl=235 time=580.0 ms
64 bytes from 128.11.68.132: icmp_seq=18 ttl=235 time=580.0 ms
64 bytes from 128.11.68.132: icmp_seq=19 ttl=235 time=870.0 ms
64 bytes from 128.11.68.132: icmp_seq=21 ttl=235 time=410.0 ms
64 bytes from 128.11.68.132: icmp_seq=22 ttl=235 time=920.0 ms
64 bytes from 128.11.68.132: icmp_seq=23 ttl=235 time=480.0 ms
64 bytes from 128.11.68.132: icmp_seq=25 ttl=235 time=1020.0 ms
wrong data byte #8 should be 0xed but was 0xec
ec 85 a 38 b d1 3 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 128.11.68.132: icmp_seq=28 ttl=235 time=760.0 ms
64 bytes from 128.11.68.132: icmp_seq=29 ttl=235 time=840.0 ms
64 bytes from 128.11.68.132: icmp_seq=30 ttl=235 time=700.0 ms
64 bytes from 128.11.68.132: icmp_seq=31 ttl=235 time=750.0 ms
64 bytes from 128.11.68.132: icmp_seq=32 ttl=235 time=440.0 ms
64 bytes from 128.11.68.132: icmp_seq=33 ttl=235 time=720.0 ms
64 bytes from 128.11.68.132: icmp_seq=34 ttl=235 time=1080.0 ms
wrong data byte #8 should be 0xf6 but was 0xf5
f5 85 a 38 8 d1 3 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 128.11.68.132: icmp_seq=36 ttl=235 time=450.0 ms
64 bytes from 128.11.68.132: icmp_seq=38 ttl=235 time=940.0 ms
64 bytes from 128.11.68.132: icmp_seq=39 ttl=235 time=870.0 ms
64 bytes from 128.11.68.132: icmp_seq=40 ttl=235 time=840.0 ms
64 bytes from 128.11.68.132: icmp_seq=41 ttl=235 time=860.0 ms
64 bytes from 128.11.68.132: icmp_seq=42 ttl=235 time=920.0 ms
64 bytes from 128.11.68.132: icmp_seq=43 ttl=235 time=500.0 ms
64 bytes from 128.11.68.132: icmp_seq=45 ttl=235 time=859.9 ms
64 bytes from 128.11.68.132: icmp_seq=46 ttl=235 time=830.0 ms
64 bytes from 128.11.68.132: icmp_seq=47 ttl=235 time=570.0 ms
64 bytes from 128.11.68.132: icmp_seq=48 ttl=235 time=940.0 ms

--- f2.mail.yahoo.com ping statistics ---
51 packets transmitted, 37 packets received, 27% packet loss
round-trip min/avg/max = 410.0/763.8/1120.0 ms
PING slashdot.org (209.207.224.41) from 206.248.78.1 : 56 data bytes
64 bytes from 209.207.224.41: icmp_seq=0 ttl=239 time=638.5 ms
64 bytes from 209.207.224.41: icmp_seq=1 ttl=239 time=560.0 ms
64 bytes from 209.207.224.41: icmp_seq=2 ttl=239 time=1020.0 ms
wrong data byte #8 should be 0x15 but was 0x14
14 86 a 38 14 da 8 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 209.207.224.41: icmp_seq=3 ttl=239 time=580.0 ms
64 bytes from 209.207.224.41: icmp_seq=4 ttl=239 time=560.0 ms
64 bytes from 209.207.224.41: icmp_seq=6 ttl=239 time=1010.0 ms
wrong data byte #8 should be 0x19 but was 0x18
18 86 a 38 1b da 8 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 209.207.224.41: icmp_seq=7 ttl=239 time=789.9 ms
64 bytes from 209.207.224.41: icmp_seq=8 ttl=239 time=680.1 ms
64 bytes from 209.207.224.41: icmp_seq=9 ttl=239 time=780.0 ms
64 bytes from 209.207.224.41: icmp_seq=10 ttl=239 time=640.0 ms
64 bytes from 209.207.224.41: icmp_seq=11 ttl=239 time=660.0 ms
64 bytes from 209.207.224.41: icmp_seq=12 ttl=239 time=410.0 ms
64 bytes from 209.207.224.41: icmp_seq=13 ttl=239 time=420.0 ms
64 bytes from 209.207.224.41: icmp_seq=15 ttl=239 time=1050.0 ms
wrong data byte #8 should be 0x22 but was 0x21
21 86 a 38 17 da 8 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 209.207.224.41: icmp_seq=16 ttl=239 time=780.0 ms
64 bytes from 209.207.224.41: icmp_seq=17 ttl=239 time=710.0 ms
64 bytes from 209.207.224.41: icmp_seq=18 ttl=239 time=1030.0 ms
wrong data byte #8 should be 0x25 but was 0x24
24 86 a 38 14 da 8 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 209.207.224.41: icmp_seq=20 ttl=239 time=780.0 ms
64 bytes from 209.207.224.41: icmp_seq=21 ttl=239 time=653.6 ms
64 bytes from 209.207.224.41: icmp_seq=22 ttl=239 time=650.0 ms
64 bytes from 209.207.224.41: icmp_seq=23 ttl=239 time=870.0 ms
64 bytes from 209.207.224.41: icmp_seq=25 ttl=239 time=550.0 ms
64 bytes from 209.207.224.41: icmp_seq=26 ttl=239 time=770.0 ms
64 bytes from 209.207.224.41: icmp_seq=27 ttl=239 time=770.0 ms
64 bytes from 209.207.224.41: icmp_seq=29 ttl=239 time=520.0 ms

--- slashdot.org ping statistics ---
30 packets transmitted, 25 packets received, 16% packet loss
round-trip min/avg/max = 410.0/715.2/1050.0 ms

--
Mike A. Harris                                     Linux advocate     
Computer Consultant                                  GNU advocate  
Capslock Consulting                          Open Source advocate

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