topic Re: How to enable trunking? in Operating System - HP-UX

How to enable trunking?

dictum9 — Fri, 19 Sep 2008 13:06:55 GMT

I have 2 interfaces on the same subnet. But only one is heavily used for backups and is choking while the other is almost idle. I want to ensure that both are evenly used.

The NIC is a 2-port card.

How do I enable trunking on 11.23?

Re: How to enable trunking?

KAUSTAV BOSE — Fri, 19 Sep 2008 14:17:58 GMT

You need to use Auto Port Aggregation software. Using this, you will be able to combine one or more interfaces into a single interface to provide load balancing and failover.

for more info:
http://docs.hp.com/en/J4240-90041/index.html

http://h20392.www2.hp.com/portal/swdepot/displayProductInfo.do?productNumber=J4240AA

Depending on the switch you have connected these interfaces to, you will need to enable LACP (link aggregation control protocol) for those ports.

Re: How to enable trunking?

Tim Nelson — Fri, 19 Sep 2008 14:24:07 GMT

Need to purchase Auto Port Aggregation (APA) software. About $1000 or so.

This will all you to create LAN aggregates or trunks utilizing 2 or more NICs. Beware that some of the load balance algorithms may not give you a 50-50 balance. The LB_MAC algorithm uses the source or destination MAC, in a switched environment with a backup going to a single source may not speed that session up, it will give greater bandwidth for additional sessions though.

Another option may be to go to Gig-Ether in your environment ( maybe you already have it ) or dedicate a LAN to backups and the other LAN to user traffic.

Re: How to enable trunking?

Tim Nelson — Fri, 19 Sep 2008 15:53:23 GMT

Another note maybe it is obvious, but the switch gear involved must also support aggregates/trunking.

( I should stop assuming ).