Re: [gentoo-amd64] Re: server setting up funny interfaces

["Mark Haney" <mhaney@ercbroadband.org>]

Duncan wrote:
> Bob Sanders <rsanders@sgi.com> posted 20081118163554.GB160178@sgi.com,
> excerpted below, on  Tue, 18 Nov 2008 08:35:54 -0800:
> 
>> Bob Sanders, mused, then expounded:
>>> Actually, it's even easier - just delete
>>> /etc/udev/rules.d/70-persistent-net.rules and reboot.  Udev will create
>>> a new /etc/udev/rules.d/70-persistent-net.rules with the correct
>>> information.
>>>
>> I'll caveat this a bit.  It works fine in simple cases - onboard GigE.
>> But in systems with add-in ethernet, GigE, or 10GigE cards,
>> /lib/udev/write_net_rules will usually make the add-in card eth0.  Some
>> Quad GigE cards have rather weird port setups or PCI-bridge addressing
>> schemes that end up with port 2 of 4 as eth0.
>>
>> In those cases, it's best to write 70-persistent-net.rules the way you
>> want it.  But remember - the mac addr has to be lower case, and all the
>> syntax correct or udev will re-write it.
> 
> It's also worth noting for those using ~arch udev, that there was an 
> issue with persistent-net.rules in udev-132, which is now masked.
> 
> I run an all ~arch system, and while I didn't configure a persistent net 
> (only one Ethernet interface to worry about, eth0 it should be and has 
> been), udev-132 caused problems for me due to that file anyway.  For some 
> reason, with udev-132, my Broadcom Tigon-3 based device was triggering 
> two different entries, the first a generic entry matching the MAC 
> address, the second also matching the MAC address but with a bit more 
> detail.  The first was setup as eth0, so when the second, apparently the 
> actually active one, appeared, it got set to eth1.



Duncan, the server I had this trouble with only had one interface.  It's 
a blade and it started acting up well over a year ago with this problem. 
I don't use DHCP on that server, and hard coded the IP and default gw on 
it and still had it acting up.  I didn't do anything specific it, it's a 
setup I've done a hundred times before on those blades.  Weird.




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Mark Haney
Sr. Systems Administrator
ERC Broadband
(828) 350-2415

Call (866) ERC-7110 for after hours support