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Re: Problems getting 2 NICs to work.

Am Mo, den 17.05.2004 schrieb Kevin Kimmell um 15:28:

First: please do not hijack foreign threads. Do not reply to articles
you won't reply to but start with an empty new email editor window. Your
posting now appears as a reply to "Re: How to install?"

> I've got several HP Proliant servers running mostly Fedora versions of 
> redhat. I'm using kernel 2.4.22-1 right now on the ones that are 
> problematic.

Important is the patch level numbering. So 2.4.22-1.2115 is initial FC1
kernel, .2188 is latest bugfixing kernel.

> These MBs on the HPs have dual gigabit ethernet controllers in them. 
> /proc/pci reports them correctly as "Broadcom Corporation NetXtreme 
> BCM5704 Gigabit Ethernet (rev 2)".
> I've got two public class C networks with two separate ISPs. When I 
> initialize eth0 to either of my public IP ranges with their respective 
> gateways everything works just fine. So now I'm trying to add an IP from 
> the other ISP's range so that I've got multiple pathways to these public 
> servers.
> Whether I add a virtual copy of eth0 with the other ISPs IP/gateway 
> combo or if I plug eth1 into the switch and give it one, networking 
> stops working. I should mention that both ISPs come in to the same 
> router and are in the smae switch plane so all wires from the servers 
> are on the same set of switches.
> Here's the route table when things are ok:
> Kernel IP routing table
> Destination Gateway Genmask Flags Metric Ref Use Iface
> * U 0 0 0 eth0
> * U 0 0 0 eth0
> * U 0 0 0 lo
> default UG 0 0 0 eth0
> What the hell is that statement? I've searched hi and lo and 
> can't figure it out. I'm making a blind guess that it's an IPv6 thing? I 
> didn't put it there and removing it doesn't survive a reboot.

That was now explained several times here on the list. See
http://www.zeroconf.org/ and the list's archive. It has nothing to do
with IPv6. How to deactivate it please consult the lists's archive.

> Anyhow, at this point all networking is fine. I can ping and trace out 
> and vice versa. Now, when I initialize eth1 here's the table:
> Destination Gateway Genmask Flags Metric Ref Use Iface
> * U 0 0 0 eth1
> * U 0 0 0 eth0
> * U 0 0 0 eth1
> * U 0 0 0 lo
> default UG 0 0 0 eth0

Well, the default route is still on the eth0 device.

> As soon as this is activated, networking stops functioning. I can't ping 
> in or out. Am I missing some key step? I know that it works becasue I'm 
> running a firewall on another machine that's running a 2.4.20 kernel and 
> it was autoconfigured and it's functioning properly.

I would imagine if you run "ping -I eth1 $target" it will result in ping

> Can anyone give me a clue?




for advanced routing howtos. You will have to use advanced features to
handle both different uplinks / class C nets.

> Thanks,
> Kevin

Btw. how did you set up those 508 IPs for this server? Do you use
aliased ethernet devices or the more modern setup way using iproute
(command ip)?


Alexander Dalloz | Enger, Germany | GPG key 1024D/ED695653 1999-07-13
Fedora GNU/Linux Core 1 (Yarrow) on Athlon CPU kernel 2.4.22-1.2188.nptl
Sirendipity 15:34:36 up 4 days, 13:19, load average: 0.42, 0.32, 0.30 
                   [ ÎÎÏÎÎ Ï'ÎÏÏÎÎ - gnothi seauton ]
             my life is a planetarium - and you are the stars

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