[ILUG] NICs in RHEL

[Brian O'Mahony]

Conor / Thomas thanks for all the suggestions. These machines will be on remote sites where, so the checking cables will be out. I think locking the MAC addresses to the interface is the best option for me.

Thanks again.

B

-----Original Message-----
From: Thomas Pedoussaut [mailto:thomas at pedoussaut.com] 
Sent: 02 December 2009 12:43
To: Brian O'Mahony
Cc: ilug at linux.ie
Subject: Re: [ILUG] NICs in RHEL

On Wed, 2009-12-02 at 12:26 +0000, Brian O'Mahony wrote:
> I am setting up a 2850 to do some testing for moving our code
> repositories over to SAN storage. I have a pe2850 with two onboard
>  NICs and a dual port PCI nic. All four ports are coming up as
> Intel e1000 ports. Is there any way of telling from inside the OS
> which exact port eth0,1,2,3 actually are? Ive seen RHEL change port
> around before, and I was just wondering how to check which interface
> corresponds to which physical port, as this will probably be
> important when we implement it.

There is 2 elements there.
1) using mii-tool or ethtool and plugging one by one the interfaces to a
switch you can determinate which is which.
2) in /etc/sysconfig/network-scripts/ifcfg-ethX you can set
HWADDR=XX:XX:XX:XX:XX:XX to the NIC's ethernet address which should
"lock" the link between ethX and the physical port.


-- 
Thomas Pedoussaut
thomas at pedoussaut.com



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