Re: [BUG] 2.2.19 -> 80% Packet Loss

Tim Moore (timothymoore@bigfoot.com)
Fri, 15 Jun 2001 02:10:54 -0700

chuckw@altaserv.net wrote:
> ...
> 2. A "ping -f -s 64589" to a machine running kernel 2.2.19 results in 0%
> packet loss. By incrementing the packetsize by one "ping -f -s 64590" or
> higher, I consistently see 80% packet loss. ifconfig on the receiving
> machine shows no anomolies.
> ...
> 4. Linux version 2.2.19-7.0.1 (root@porky.devel.redhat.com) (gcc version
> egcs-2.91.66 19990314/Linux (egcs-1.1.2 release)) #1 Tue Apr 10 00:55:03
> EDT 2001

No problems here.

rgds,
tim.

[note: -ai = athlon kernel + ide patch]

[tim@abit cron.daily]# cat /proc/version
Linux version 2.2.20p2-ai (root@abit) (gcc version egcs-2.91.66
19990314/Linux (egcs-1.1.2 release)) #12 Fri May 25 16:31:02 PDT 2001

[tim@abit cron.daily]# ifconfig eth0
eth0 Link encap:Ethernet HWaddr 00:A0:CC:57:89:93
inet addr:192.168.1.10 Bcast:192.168.1.255
Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:10204 errors:0 dropped:0 overruns:0 frame:0
TX packets:15280 errors:1 dropped:0 overruns:0 carrier:1
collisions:0 txqueuelen:100
Interrupt:11 Base address:0xec00

[tim@abit cron.daily]# ping -f -s 64590 dell
PING dell.yoyodyne.org (192.168.1.11) from 192.168.1.10 : 64590(64618)
bytes of data.
Warning: no SO_RCVTIMEO support, falling back to poll
..
--- dell.yoyodyne.org ping statistics ---
639 packets transmitted, 637 packets received, 0% packet loss
round-trip min/avg/max/mdev = 15.852/16.406/38.972/2.068 ms
[tim@abit cron.daily]# ifconfig eth0
eth0 Link encap:Ethernet HWaddr 00:A0:CC:57:89:93
inet addr:192.168.1.10 Bcast:192.168.1.255
Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:38312 errors:0 dropped:0 overruns:0 frame:0
TX packets:43421 errors:3 dropped:0 overruns:2 carrier:1
collisions:0 txqueuelen:100
Interrupt:11 Base address:0xec00

[tim@abit cron.daily]# ping dell -c 3
PING dell.yoyodyne.org (192.168.1.11) from 192.168.1.10 : 56(84) bytes
of data.
64 bytes from dell.yoyodyne.org (192.168.1.11): icmp_seq=0 ttl=255
time=334 usec
64 bytes from dell.yoyodyne.org (192.168.1.11): icmp_seq=1 ttl=255
time=294 usec
64 bytes from dell.yoyodyne.org (192.168.1.11): icmp_seq=2 ttl=255
time=296 usec

--- dell.yoyodyne.org ping statistics ---
3 packets transmitted, 3 packets received, 0% packet loss
round-trip min/avg/max/mdev = 0.294/0.308/0.334/0.018 ms

[tim@abit cron.daily]# ifconfig lo
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:3924 Metric:1
RX packets:724500 errors:0 dropped:0 overruns:0 frame:0
TX packets:724500 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0

[tim@abit cron.daily]# ping -f -s 64590 localhost
PING localhost (127.0.0.1) from 127.0.0.1 : 64590(64618) bytes of data.
Warning: no SO_RCVTIMEO support, falling back to poll
.
--- localhost ping statistics ---
7754 packets transmitted, 7754 packets received, 0% packet loss
round-trip min/avg/max/mdev = 0.960/1.011/25.556/0.623 ms
[tim@abit cron.daily]# ifconfig lo
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:3924 Metric:1
RX packets:988136 errors:0 dropped:0 overruns:0 frame:0
TX packets:988136 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0 

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