Weird ethernet port behavior

[m.roth at 5-cent.us]

Matty Sarro wrote:
> On Thu, Sep 23, 2010 at 1:19 PM, Matty Sarro <msarro at gmail.com> wrote:
>> On Thu, Sep 23, 2010 at 12:56 PM, <m.roth at 5-cent.us> wrote:
>>> Matty Sarro wrote:
>>> > Hey everyone. I'm having a weird issue right now with a network port
>>> and I don't know what to make of it.
>>> <snip>
>>> > Eth1 is configured to connect to a secondary network. Eth3 is
>>> > disabled (onboot=no in /etc/sysconfig/network-scripts/ifcfg-eth3).
>>> >
>>> > Here are the contents of the ifcfg-eth1 and ifcfg-eth3 files:
<snip>
>>> > After the bonded pair, we have two ethernet ports left. When we
>>> > attempt to
>>> > plug in what SHOULD be eth1 and restart network services, it gets no
>>> > connectivity. After rebooting, when you run ethtool eth1 it shows that
>>> > eth1 has no link. Running ethtool on eth3 shows that it DOES have link.
>>> <snip>

>> Trying it now, problem is it has to be automated so I have to start from
>> scratch. Will report back afterwards. Going to try specifying them in
>> the ifcfg files, and if that doesn't work I'll try adding udev rules.
>>
>>> Sounds like it's related to the old Redhat thing that a multihomed
>>> system didn't necessarily get the same name, unless you put the MAC
address in
>>> there.
>>> HWADDR=<MAC address>
>>>
>>> You might try that and see if it works.
>>>
> After adding the HWADDR line to each of the ifcfg-* files, it looks like
> eth1 is staying put. However, even though its unplugged eth3 shows that
> there is link detected when running ethtool? There's definitely nothing
> connected.
>
Glad to hear it got you up. No idea on the other... maybe something with
udev on its way up.

      mark, who's dealing with *no* a/c in a tiny server room, and folks
              using it, and a building engineer that hasn't been heard
              from since my manager put in the trouble ticket....