APA (Auto Port Aggregation) Advve --trunk or LAN Monitor mode?

[Alzhy]

We are planning to enable LAN failover on our HP's .. just as we do on Solaris with IPMP. APA was the software mentioned to do the trick.. Halfwar reading through the manuals..

Which is prefereable: trunk (LACP/Manual) or LAN Monitor approach?

Also, what are the IP address requirements or how many IP addresses must we request from our Network Team in either apporaches? For LAN monitor mode -- do I read it right that I need 2 IP addresses -- one main (for the server) and the other for the failover?

Gracias!

[Krishna Prasad]

We manually configure the aggregate.

However, what we did was bind two ports to one IP
address. This gives us 200 MB port under normall operations and 100 MB if on of the ports/cards/core switches/cables fail.

So, we actually don't use the lan monitor option.
We actually keep two ports active at all times.

We have two core switches and two 4 port ethernet
cards in each production machine. We bind accross
network cards and core switches.

This gives us an active/active failover rather than active/passive which is what the Lan stby does.

Hope this helps.

[Berlene Herren]

Lan monitor

For details on configuring the FEC_AUTO, MANUAL, or LACP modes, see "Configuring APA by Editing Files" or "Configuring APA Using SAM" http://docs.hp.com/hpux/onlinedocs/J4240-90016/J4240-90016.html.

Berlene

[Sunil Sharma_1]

Hi,

Trunk mode is batter becoz you will get dubble bandwidth.

unlike IPMP in Solaris here you require only one IP address each trunk in case of failure of one card same IP will fail over to another card.

It's something like floting IP in cluster solution.

Sunil