Marco Berizzi wrote:
Herbert Xu wrote:
On Mon, May 08, 2006 at 08:28:32AM +0000, Marco Berizzi wrote:
>
> [EMAIL PROTECTED]:~# ping 10.49.59.23
> PING 10.49.59.23 (10.49.59.23) 56(84) bytes of data.
> 64 bytes from 10.49.59.23: icmp_seq=1 ttl=247 time=91.9 ms
> 64 bytes from 10.49.59.23: icmp_seq=2 ttl=247 time=49.3 ms
> 64 bytes from 10.49.59.23: icmp_seq=3 ttl=247 time=106 ms
> 64 bytes from 10.49.59.23: icmp_seq=4 ttl=247 time=74.3 ms
>
> --- 10.49.59.23 ping statistics ---
> 4 packets transmitted, 4 received, 0% packet loss, time 2998ms
> rtt min/avg/max/mdev = 49.316/80.460/106.257/21.241 ms
> [EMAIL PROTECTED]:~# cd /tmp/
> [EMAIL PROTECTED]:/tmp# tcpdump -v -p -n ip host 10.49.59.23 >
> /tmp/NULL-10.49.59.23 &
> [1] 18981
> [EMAIL PROTECTED]:/tmp# tcpdump: listening on eth0, link-type EN10MB
(Ethernet),
> capture size 96 bytes
>
> [EMAIL PROTECTED]:/tmp# ping 10.49.59.23
> PING 10.49.59.23 (10.49.59.23) 56(84) bytes of data.
>
> --- 10.49.59.23 ping statistics ---
> 8 packets transmitted, 0 received, 100% packet loss, time 6999ms
>
> [EMAIL PROTECTED]:/tmp# fg
> tcpdump -v -p -n ip host 10.49.59.23 >/tmp/NULL-10.49.59.23
> 101 packets captured
> 101 packets received by filter
> 0 packets dropped by kernel
Yes this is really weird. The only thing I can think of is that it
somehow managed to put some bogus entry into the conntrack table.
What happens if you do
grep 10.49.59.23 /proc/net/ip_conntrack
before and after the tcpdump?
I'm not able to reproduce it :-[[[
Today mimosa is running 2.6.17.4, mon May 8 mimosa was running
2.6.16.12
If you want I could downgrade to 2.6.16.12 and see if I'm able
to reproduce it.
Sorry.
Me again. After a while here is:
[EMAIL PROTECTED]:/tmp# ping 10.49.59.23
PING 10.49.59.23 (10.49.59.23) 56(84) bytes of data.
--- 10.49.59.23 ping statistics ---
4 packets transmitted, 0 received, 100% packet loss, time 3010ms
[EMAIL PROTECTED]:/tmp# grep 10.49.59.23 /proc/net/ip_conntrack
tcp 6 431889 ESTABLISHED src=172.16.0.167 dst=10.49.59.23 sport=1142
dport=3218 packets=27 bytes=3559 src=10.49.59.23 dst=172.29.128.1 sport=3218
dport=1142 packets=37 bytes=38629 [ASSURED] mark=0 use=1
[EMAIL PROTECTED]:/tmp# ping 10.49.59.23
PING 10.49.59.23 (10.49.59.23) 56(84) bytes of data.
--- 10.49.59.23 ping statistics ---
13 packets transmitted, 0 received, 100% packet loss, time 11999ms
[EMAIL PROTECTED]:/tmp# grep 10.49.59.23 /proc/net/ip_conntrack
tcp 6 431868 ESTABLISHED src=172.16.0.167 dst=10.49.59.23 sport=1142
dport=3218 packets=27 bytes=3559 src=10.49.59.23 dst=172.29.128.1 sport=3218
dport=1142 packets=37 bytes=38629 [ASSURED] mark=0 use=1
[EMAIL PROTECTED]:/tmp# tcpdump -v -p -n ip host 10.49.59.23 > HERBERT-20060711
&
[1] 4747
[EMAIL PROTECTED]:/tmp# tcpdump: listening on eth0, link-type EN10MB (Ethernet),
capture size 96 bytes
[EMAIL PROTECTED]:/tmp# grep 10.49.59.23 /proc/net/ip_conntrack
tcp 6 431853 ESTABLISHED src=172.16.0.167 dst=10.49.59.23 sport=1142
dport=3218 packets=27 bytes=3559 src=10.49.59.23 dst=172.29.128.1 sport=3218
dport=1142 packets=37 bytes=38629 [ASSURED] mark=0 use=1
[EMAIL PROTECTED]:/tmp# ping 10.49.59.23
PING 10.49.59.23 (10.49.59.23) 56(84) bytes of data.
--- 10.49.59.23 ping statistics ---
9 packets transmitted, 0 received, 100% packet loss, time 8026ms
[EMAIL PROTECTED]:/tmp# grep 10.49.59.23 /proc/net/ip_conntrack
tcp 6 431837 ESTABLISHED src=172.16.0.167 dst=10.49.59.23 sport=1142
dport=3218 packets=27 bytes=3559 src=10.49.59.23 dst=172.29.128.1 sport=3218
dport=1142 packets=37 bytes=38629 [ASSURED] mark=0 use=1
[EMAIL PROTECTED]:/tmp# fg
tcpdump -v -p -n ip host 10.49.59.23 >HERBERT-20060711
9 packets captured
9 packets received by filter
0 packets dropped by kernel
[EMAIL PROTECTED]:/tmp# cat HERBERT-20060711
11:23:48.981383 IP (tos 0x0, ttl 248, id 27422, offset 0, flags [none],
length: 84) 10.49.59.23 > 172.29.128.1: icmp 64: echo reply seq 1
11:23:49.983515 IP (tos 0x0, ttl 248, id 27426, offset 0, flags [none],
length: 84) 10.49.59.23 > 172.29.128.1: icmp 64: echo reply seq 2
11:23:50.983110 IP (tos 0x0, ttl 248, id 27521, offset 0, flags [none],
length: 84) 10.49.59.23 > 172.29.128.1: icmp 64: echo reply seq 3
11:23:51.994398 IP (tos 0x0, ttl 248, id 27523, offset 0, flags [none],
length: 84) 10.49.59.23 > 172.29.128.1: icmp 64: echo reply seq 4
11:23:52.999726 IP (tos 0x0, ttl 248, id 27525, offset 0, flags [none],
length: 84) 10.49.59.23 > 172.29.128.1: icmp 64: echo reply seq 5
11:23:53.999583 IP (tos 0x0, ttl 248, id 27529, offset 0, flags [none],
length: 84) 10.49.59.23 > 172.29.128.1: icmp 64: echo reply seq 6
11:23:54.999584 IP (tos 0x0, ttl 248, id 27531, offset 0, flags [none],
length: 84) 10.49.59.23 > 172.29.128.1: icmp 64: echo reply seq 7
11:23:56.013499 IP (tos 0x0, ttl 248, id 27554, offset 0, flags [none],
length: 84) 10.49.59.23 > 172.29.128.1: icmp 64: echo reply seq 8
11:23:57.000901 IP (tos 0x0, ttl 248, id 27936, offset 0, flags [none],
length: 84) 10.49.59.23 > 172.29.128.1: icmp 64: echo reply seq 9
[EMAIL PROTECTED]:/tmp#
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