Configuring Multihomed Host

[Greg Vickers]

Ah, you are right Jim. Thanks for pointing out the duplication, I will keep 
that in mind when implementing future checks on that server!
ATM we have a service that serves the different subnets so we need to know 
that that service appears on the different subnets, just as you pointed out.

Thanks for the tip!

Greg

At 09:42 25/10/2002, Carroll, Jim P [Contractor] wrote:
>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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