Re: Install NIC cards w/ HACMP

From: Simon Marchese (sjm_news_at_yahoo.co.uk)
Date: 11/06/03 

Date: Thu, 6 Nov 2003 19:35:58 +0000 (UTC)

Patrick wrote:
>
> Simon Marchese wrote:
> [snip]
>
>
>> change to the HACMP configuration. However, at an AIX level, you will
>> need to remove their definitions from AIX, physically remove the old
>> cards, add the new cards, define them to AIX and continue.
>
>
> That's not universally true, is it? If I replaced some token ring cards
> with ethernet cards just defining is not enough. As far as I know the
> HACMP definition also cares for the device names, e.g. tr0, et0, en0. So
> if the new nic's get device names other than the old one's had, HACMP
> won't start. That could become important if there is a special
> configuration at the switches the nic's are connected to.

You're right in general, but for the wrong reason. HACMP works out names
and stuff when it needs to. The main reason HACMP cares about the type
of card is in the network type - ethernet cards of all types are treated
differently to token-ring. For example, if ethernet comms stop out of an
adapter, it's dead or it's cable is or it's switch is. In token-ring,
the ring may be reconfiguring, so you have to wait awhile before
thinking it's dead.

It's also a more involved operation if you want to keep the nodes up
whilst this is going on. I was just asnwering in the context of the
original question.

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