Messages in this thread | | | Date | Thu, 14 Jun 2001 14:17:11 -0700 (PDT) | From | <> | Subject | [BUG] 2.2.19 -> 80% Packet Loss |
| |
1. When pinging a machine using kernel 2.2.19 I consistently get an 80% packet loss when doing a ping -f with a packet size of 64590 or higher.
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.
3. 2.2.19, ping, flood, 64589, 64590, 80%, packet, loss
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
5. There was no oops associated with this.
6. >>EOF /bin/ping -f -s 64589 /bin/ping -f -s 64590 EOF
7.1 /usr/src/linux-2.2.19/scripts/ver_linux Linux orchid 2.2.19-7.0.1 #1 Tue Apr 10 00:55:03 EDT 2001 i686 unknown
Gnu C 2.96 Gnu make 3.79.1 binutils 2.10.0.18 util-linux 2.10r modutils 2.3.21 e2fsprogs 1.18 Linux C Library > libc.2.2 Dynamic linker (ldd) 2.2 Procps 2.0.7 Net-tools 1.56 Console-tools 0.3.3 Sh-utils 2.0 Modules Loaded autofs nfsd lockd sunrpc 3c59x agpgart usb-uhci usbcore
7.2 cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 8 model name : Pentium III (Coppermine) stepping : 3 cpu MHz : 751.725 cache size : 256 KB fdiv_bug : no hlt_bug : no sep_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 2 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov pat pse36 mmx fxsr xmm bogomips : 1500.77
7.3 cat /proc/modules autofs 9424 3 (autoclean) nfsd 182752 8 (autoclean) lockd 45264 1 (autoclean) [nfsd] sunrpc 61808 1 (autoclean) [nfsd lockd] 3c59x 21584 1 (autoclean) agpgart 18960 0 (unused) usb-uhci 18736 0 (unused) usbcore 43120 1 [usb-uhci]
7.4 No SCSI devices
7.5 /sbin/ifconfig (after sending it several pings with 80% packet loss)
eth0 Link encap:Ethernet HWaddr 00:60:97:D7:60:E4 inet addr:10.0.0.102 Bcast:10.0.0.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:3972983 errors:0 dropped:0 overruns:0 frame:0 TX packets:5466442 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:100 Interrupt:12 Base address:0xa800
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:210 errors:0 dropped:0 overruns:0 frame:0 TX packets:210 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0
X. This has only been tested/observed on a 10Mb as well as a newer 100Mb LAN. This has also been observed on machines running kernel 2.2.17. Non Linux machines (NT and Win98) were tested in the same manner and do not show the same symptoms. I reviewed the LKML archives, grep'd in the sources and did a string on the kernel binary and was not able to find any useful reference to 64590, 64589 or ping losses due to packet size.
-- Chuck Wolber System Administrator AltaServ Corporation (425)576-1202 ten.vresatla@wkcuhc
Quidquid latine dictum sit, altum viditur.
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |