Monitoring Redundant path routers

[Tedman Eng]

This can be done.  You will have to configure the dependencies so that
Nagios knows the relationships (from viewpoint of nagios)

I think perhaps that you will need to have different objects to represent
the individual interfaces since the paths to router3 are assymetrical.  We
have some remote networks that have multiple routers, and this is the
easiest we've found to accomodate them.  The same method can be used if you
have multiple links from ISPs coming into one router.


           Nagios
             |
             |
          Router2
       (192.168.1.1)
             |
            / \
           /   \
          /     \
         /       \
     Router1   Router3if1
(192.168.0.1) (192.168.0.6)
       /           |
      /            |
   Router3if2      |
(192.168.0.10)     |
      \            |
       \          /
        \        /
         \      /
         Switch1
      (192.168.2.2)






-----Original Message-----
From: Samuel Petreski [mailto:petreski at ksu.edu]
Sent: Monday, April 26, 2004 10:33 AM
To: nagios-users at lists.sourceforge.net
Subject: [Nagios-users] Monitoring Redundant path routers


Hi,
 
I was looking into using Nagios for Enterprise wide monitoring and am very
impressed with all the capabilities, but ran into following question:
 
                                      192.168.0.1          192.168.0.2
192.168.1.21
                        --------------------
--------------------192.168.1.1           --------------------
                        | Router 1     |----------------------------| Router
2     |----------------------------|  Nagios       |
                        --------------------
--------------------                            --------------------
                  192.168.0.9 \
/  192.168.0.5
                                     \
/
                                      \
/
                                       \
/
                                        \
/
                                         \                                /
                                          \                             /
                                           \                          /
                                            \                       /
                                             \                    /
                                              \                 /
                            192.168.0.10\               / 192.168.0.6
                                              --------------------
                                              | Router 3     |
                                              --------------------
                                                      |  192.168.2.1
                                                      |
                                                      |  192.168.2.2
                                                -------------
                                                | Switch1|
                                                -------------
 
Can Nagios monitor the individual interfaces between the routers in order to
inform me when a link/interface goes down? I'm mainly interested if
monitoring Router 3, to have Router 1 and Router 2 as dependencies, but also
to know if the link between Router 1 and Router 2 goes down, because Nagios
will be able to reach Router 3 through the link between Router 2 and Router
3.
 
Any help would be greatly appreciated and if further information is
required, please feel free to let me know.
 
--Samuel
 
P.S. If this is a cross post, please let me know where I can find the
original post.


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