Problem with parents and multipath

Daniel Meyer eagle at cyberdelia.de
Thu Mar 8 09:03:01 CET 2007


Hi,

i've the following network structure between our main location and several 
other sites:

                  /---->RouterA1<---->RouterB1<----\
LanA<---->SwitchA                 X                SwitchB<---->LanB
                  \---->RouterA2<---->RouterB2<----/

The nagios server is located in LanA, switch a and b are layer3 switches 
and are being used as default gateway in their local networks. Each wan 
link is connected to both routers on each side - so any single failing 
router or wan link does not cause a network problem.

I used the following config on the nagios server:

RouterA1:
parents SwitchA

RouterA2:
parents SwitchA

RouterB1:
parents RouterA1,RouterA2

RouterB2:
parents RouterA1,RouterA2

SwitchB:
parents RouterB1,RouterB2

The problem is: if any given router fails nagios states "blocking outage" 
and stops sending messages for any other system on the remote site. This 
is clearly wrong, since all systems are perfectly reachable.

Is there a mistake in my config or have i hit a bug?

Danny
-- 
Q: Gentoo is too hard to install      =        http://www.cyberdelia.de
    and I feel like whining.           =             eagle at cyberdelia.de
A: Please see /dev/null.              =
       (from the gentoo installer FAQ) =                             \o/

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