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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
> 204.117.218.0 * 255.255.255.0 U 0 0 0 eth0
> 169.254.0.0 * 255.255.0.0 U 0 0 0 eth0
> 127.0.0.0 * 255.0.0.0 U 0 0 0 lo
> default 204.117.218.254 0.0.0.0 UG 0 0 0 eth0
> 
> What the hell is that 169.254.0.0 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
> 12.168.88.0 * 255.255.255.0 U 0 0 0 eth1
> 204.117.218.0 * 255.255.255.0 U 0 0 0 eth0
> 169.254.0.0 * 255.255.0.0 U 0 0 0 eth1
> 127.0.0.0 * 255.0.0.0 U 0 0 0 lo
> default 204.117.218.254 0.0.0.0 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
replies?

> Can anyone give me a clue?

Check

http://lartc.org/

http://www.tldp.org/HOWTO/Adv-Routing-HOWTO/

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


-- 
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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