question about the HPUX

[navin]

Hi,
This question is about the OS install using ignite image.I do have clients located in different subnet which is different than my ignite server..do i need to have a boot host in the client subnet in order to perfom the ignite install using golden image from ignite server.
Thanks in advance.

[Patrick Wallek · Accepted solution]

It depends. This is covered in the Ignite/UX admin guide.
http://www.docs.hp.com/en/B2355-90997/index.html

Appendix C of the manual talks about boot helper systems and when they are required.

http://www.docs.hp.com/en/B2355-90997/apc.html

[navin]

Hi,
Thanks much for the reply.So it looks like
there is no boot helper is required to install the OS across the subnet using ignite server.
Am i understanding correct.
thanks

[Bill Hassell]

> So it looks like
there is no boot helper is required to install the OS across the subnet using ignite server.

Not accurate. When you are cold-installing a new server, the processor has no concept of a network (there is no HP-UX, no networking drivers) so the computer simply polls the local network to see if an Ignite server is supplying an image. To go between subnets, the concept of a router is needed. So a boothelper is needed, either as a bootable tape (such as an Ignite tape), a bootable CD or DVD, or another machine on the same subnet which can provide a basic networking kernel. Once the basic kernel is in RAM, Ignite servers on other networks can be used.

[navin]

Bill,There is a link in this same thread says that if we use bootsys we may no need to have the boot helpers .Is that true practically.
Thanks

[Bill Hassell]

> There is a link in this same thread says that if we use bootsys we may no need to have the boot helpers .Is that true practically.

Yes it is true. However, bootsys is a program that runs on HP-UX. So it is only useful if you already have a running system that you want to replace. Here' the detail: http://www.docs.hp.com/en/B2355-90997/ch09s01.html You can also 'push' a network install from the Ignite server to a running system. Both scenarios require a running version of HP-UX.

The more common method for using Ignite images is to install HP-UX on a dead system (such as a replacement boot disk) where there is no working HP-UX.