how to configure APA for failover

[Alan Casey]

Hi,

I would like to configure HP Auto Port Aggregation, to allow for failover on HP-UX 11.0 Can anyone tell me how to do this?

Basically, we have 2 network cards on the box and want them both to have the same IP address for failover.

[Karthik S S]

Hi,

Following link explains configuring APA by editing the config files,

http://docs.hp.com/cgi-bin/fsearch/framedisplay?top=/hpux/onlinedocs/J4240-90016/J4240-90016_top.html&con=/hpux/onlinedocs/J4240-90016/00/00/10-con.html&toc=/hpux/onlinedocs/J4240-90016/00/00/10-toc.html&searchterms=APA&queryid=20030610-051918

Also refer to the forum posting,

http://bizforums.itrc.hp.com/cm/QuestionAnswer/0,,0x7f4035a43b46d71190080090279cd0f9,00.html

Regards,
Karthik S S

[Kevin Wright]

There is a complete manual on APA on docs.hp.com,
http://docs.hp.com/hpux/netcom/index.html#Auto%20Port%20Aggregation%20(APA)

[Jim Keeble]

You have 2 options.

You can set up a load balancing aggregate, or "trunk", where both cards will "join" an aggregate interface such as lan100. This requires the co-operation of the link partner (ie., the switch) and works only with 100BT or gigabit NIC's. In this configuration, the outbound traffic is balanced between the 2 cards, who share a common MAC and IP address. The inbound traffic is balanced by the link partner.

The second option is called "Lan Monitor" mode. It is configured using commands similar in function to the MC/Serviceguard commands if you are familiar. In this mode, both cards are formed into a failover group, again using an interface name like lan100. But, only one card is active at a time. This requires no special configuration on the link partner, and fddi and token ring are supported as well.

Both of your NIC's have to be of the same driver type.

The previous answers have links to the detailed documentation.