Configuring Multihomed Host

[Carroll, Jim P [Contractor]]

I would think you'd want to set up a dependancy rule.  Loosely speaking:

run test_A on interface_1
if success on interface_1
	ignore interface_2
else
	run test_A on interface_2
end

What you propose will possibly end up duplicating some tests.  For example,
NRPE tests.  A partition space check done from one interface will be no
different than the other interface (one would hope ;^).  But with the
proposed solution (below), if one of the interfaces goes down, then you'll
get a Critical alert for the partition space check (connection timed out).
I'm not sure that's desireable.

OTOH, if you have a web server bound to one port on one interface, and to
another port on the other interface, then yes, you'll want to keep them both
under scrutiny.

Just my $0.02.

jc

> -----Original Message-----
> From: Greg Vickers [mailto:g.vickers at qut.edu.au]
> Sent: Thursday, October 24, 2002 5:55 PM
> To: Daniel Imazava; nagios-users at lists.sourceforge.net
> Subject: Re: [Nagios-users] Configuring Multihomed Host
> 
> 
> Daniel,
> I have done just this and configured a host definition per NIC on the 
> server. You can then test for the same service on each NIC 
> (through each 
> different subnet). Config follows:
> 
> Host config:
> 
> define host{
>     host_name    janeway-220
>     alias        Janeway subnet 220
>     address      xxx.xxx.220.xxx
>     parents      upstream_router
>     use          generic-template-host
>     }
> 
> define host{
>     host_name    janeway-23
>     alias        Janeway subnet 23
>     address      xxx.xxx.23.xxx
>     parents      upstream_router
>     use          generic-template-host
>     }
> 
> 
> For the hostgroups for these hosts:
> 
> define hostgroup{
>     hostgroup_name       Fred
>     alias                Fred as well
>     contact_groups       test-group
>     members              janeway-220, janeway-23
>     }
> 
> And the service:
> 
> define service{
>     hostgroup_name       fred-servers
>     service_description  Test for presence of Fred
>     check_command        check_nt!The_Service_Formerly_Known_As_Fred
>     use                  generic-template-service
>     }
> 
> 
> Hope this helps,
> Greg
> 
> At 04:26 25/10/2002, Daniel Imazava wrote:
> 
> >Hello,
> >
> >To configuring multihomed hosts, Do I have to create a 
> "host" for each
> >interface?
> >
> >Thanks
> >
> >
> >
> >
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> Greg Vickers
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> Queensland University of Technology,
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