Colisiones

eth1 Link encap:Ethernet HWaddr 00:11:25:57:BC:69
inet addr:62.151.24.74 Bcast:62.151.24.79 Mask:255.255.255.240
inet6 addr: fe80::211:25ff:fe57:bc69/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:174549467 errors:0 dropped:0 overruns:0 frame:0
TX packets:190245054 errors:29876265 dropped:0 overruns:0 carrier:29876265
collisions:32648117 txqueuelen:1000
RX bytes:1089220947 (1.0 GiB) TX bytes:2670160874 (2.4 GiB)
Base address:0x4400 Memory:d0340000-d0360000

Las colisiones son _normales_ en redes CSMA/CD como Ethernet con lo que
la cantidad absoluta de colisiones no es un problema, siempre y cuando
no exceda el 3% de las transmisiones totales. Esto es, si

colisiones * 100 / ( transmisiones + colisiones ) <= 4 3264811700 / 222893171 = 14,6 como mucho debería ser 4 ¿Podrías mirar si las tarjetas están generando muchas interrupciones? Puedes saberlo con un cat /proc/interrupts: ender@bonzo:~$ cat /proc/interrupts CPU0 0: 145243168 XT-PIC timer 1: 658148 XT-PIC keyboard 2: 0 XT-PIC cascade 5: 12889488 XT-PIC soundblaster 8: 3 XT-PIC rtc 10: 2222796 XT-PIC usb-uhci 12: 6588303 XT-PIC eth0 <======= Este valor. 14: 1522717 XT-PIC ide0 15: 10359 XT-PIC ide1 NMI: 0 LOC: 145243899 ERR: 0 MIS: 0 ¿Sube *a lo bestia* cuando haces una transferencia? Debería subir en uno por cada paquete. solucionado cuando han forzado el switch a full duplex mii-tool --force 100baseTx-FD eth1 Colisiones en inteface eth1 referencias http://linux-ip.net/html/tools-ethernet.html ~# netstat -in Kernel Interface table Iface MTU Met RX-OK RX-ERR RX-DRP RX-OVR TX-OK TX-ERR TX-DRP TX-OVR Flg eth0 1500 0 1248529355 0 0 01238671872 0 0 0 BMRU eth1 1500 0 304093570 0 0 0345828281 45713974 0 0 BMRU lo 16436 0 3590482 0 0 0 3590482 0 0 0 LRU lo:1 16436 0 - no statistics available - LRU eth1 Link encap:Ethernet HWaddr 00:11:25:57:BC:69 inet addr:62.151.24.74 Bcast:62.151.24.79 Mask:255.255.255.240 inet6 addr: fe80::211:25ff:fe57:bc69/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:304226299 errors:0 dropped:0 overruns:0 frame:0 TX packets:346020913 errors:45713974 dropped:0 overruns:0 carrier:45713974 collisions:50035841 txqueuelen:1000 RX bytes:1487723678 (1.3 GiB) TX bytes:1302534086 (1.2 GiB) Base address:0x4400 Memory:d0340000-d0360000 Cambiar de half-duplex a full-duplex # mii-tool eth0 eth0: 10 Mbit, half duplex, link ok Port Speed Description 10baseT-HD 10 megabit half duplex 10baseT-FD 10 megabit full duplex 100baseTx-HD 100 megabit half duplex 100baseTx-FD 100 megabit full duplex ~# mii-tool eth0 eth0: negotiated 100baseTx-FD, link ok ~# mii-tool -v eth0: negotiated 100baseTx-FD, link ok product info: vendor 00:aa:00, model 56 rev 0 basic mode: autonegotiation enabled basic status: autonegotiation complete, link ok capabilities: 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD advertising: 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD flow-control link partner: 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD eth1: negotiated 100baseTx-FD, link ok product info: vendor 00:aa:00, model 56 rev 0 basic mode: autonegotiation enabled basic status: autonegotiation complete, link ok capabilities: 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD advertising: 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD flow-control link partner: 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD # mii-tool --force 100baseTx-FD # mii-tool eth0 eth0: 100 Mbit, full duplex, link ok tambien se puede forzar en los parametros de los modulos dependiendo de la tarjeta http://www.cites.uiuc.edu/network/autosense.html Cisco Catalyst Switches Departmental Switches On most multi-module Cisco switches, you can display the current port status with the command: show port mod/port(s) The Duplex and Speed columns of the table will tell you what the current port mode is set to. If the port has been forced to a specific mode, that mode will simply be listed. If the port is set to auto-negotiation, but nothing is plugged into it, the speed and duplex will be reported as auto. If the current mode was the result of a successful auto-negotiation, the labels will be prefixed with "a-" (e.g. a-100 or a-full). To change the mode of a port, you can use the following commands: set port speed mod/port(s) mode, with mode being either 10, 100, or auto. set port duplex mod/port(s) mode, with mode being either full or half. If a port has its speed mode set to auto, the duplex mode will also be set to auto and you will not be able to change it. In order to change the duplex mode, you will need to set the speed mode to 10 or 100. For more information, see the Cisco Catalyst 5000 series Ethernet/Fast Ethernet Module manual. If you are depending on auto-negotiation, please be sure that portfast is configured on, and etherchannel should be set to off.