eth0 changes to eth1 after initial boot; udev rules correct; modprobe.confcorrect.

From: Ehud . Gavron
Date: Wed Feb 13 2008 - 20:28:20 EST


Since going to 2.6.24 my wired lan changed from eth0 to eth1. It starts as eth0... but then changes to eth1.

udev rules hard sets it to eth0. For the heck of it I deleted 70...network... and it recreated it with eth1, I changed manually to eth0. still have the problem.

modprobe.conf had an alias for eth1, changed it to eth0, no difference. removed modprobe alias. no difference.

sysconfig as written by kudzu made it eth1, changed to eth0 and stopped kudzu from running. still persists to becoming eth1.

THERE IS NO REFERENCE TO ETH1 in any file and yet upon boot... it CHANGES from eth0 to eth1!!!

Where else in the system does something cause this effect?

I have googled "eth0 becomes eth1", "nic changes name" both with and without 2.6.24. Every response referse to the udev rules in 70-presistent-net.rules.

Any ideas to resolve or debug this would be appreciated.

E
[root@egdell ~]# dmesg | grep eth
Driver 'sd' needs updating - please use bus_type methods
Driver 'sr' needs updating - please use bus_type methods
eth0: Tigon3 [partno(BCM5752KFBG) rev 6002 PHY(5752)] (PCI Express) 10/100/1000Base-T Ethernet 00:18:8b:a5:2c:f5
eth0: RXcsums[1] LinkChgREG[0] MIirq[0] ASF[0] WireSpeed[1] TSOcap[1]
eth0: dma_rwctrl[76180000] dma_mask[64-bit]
ADDRCONF(NETDEV_UP): eth1: link is not ready
bridge-eth0: peer interface eth0 not found, will wait for it to come up
bridge-eth0: attached
ADDRCONF(NETDEV_UP): eth1: link is not ready
[root@egdell ~]# ifconfig -a
eth1 Link encap:Ethernet HWaddr 00:18:8B:A5:2C:F5 UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
Interrupt:18

lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:1309 errors:0 dropped:0 overruns:0 frame:0
TX packets:1309 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:2366648 (2.2 MiB) TX bytes:2366648 (2.2 MiB)

vmnet8 Link encap:Ethernet HWaddr 00:50:56:C0:00:08 inet addr:192.168.232.1 Bcast:192.168.232.255 Mask:255.255.255.0
inet6 addr: fe80::250:56ff:fec0:8/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)

wlan0 Link encap:Ethernet HWaddr 00:1A:92:0E:40:1F inet addr:10.1.1.5 Bcast:10.1.1.255 Mask:255.255.255.0
inet6 addr: fe80::21a:92ff:fe0e:401f/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:17 errors:0 dropped:0 overruns:0 frame:0
TX packets:15 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1838 (1.7 KiB) TX bytes:1900 (1.8 KiB)

wmaster0 Link encap:UNSPEC HWaddr 00-1A-92-0E-40-1F-00-00-00-00-00-00-00-00-00-00 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
[root@egdell ~]# more /etc/udev/rules.d/70-persistent-net.rules
# This file was automatically generated by the /lib/udev/write_net_rules
# program run by the persistent-net-generator.rules rules file.
#
# You can modify it, as long as you keep each rule on a single line.

# PCI device 0x14e4:0x1600 (tg3) (custom name provided by external tool)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:18:8b:a5:2c:f
5", ATTR{type}=="1", NAME="eth0"

# PCI device 0x14e4:0x4311 (b43-pci-bridge)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:1a:92:0e:40:1
f", ATTR{type}=="1", NAME="wlan0"
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