OT - fault tolerant default router for Nagios host.[SEC=UNCLASSIFIED]

[Jonah Horowitz]

At my last company we used the Linux bonding driver for several of our HA
servers.  It's a little complicated to set up, but once configured it ran
like a gear.  We used the failover mode and connected our servers to
multiple switches.  I plan on implementing the same thing at my current
company once the network is ready for it.

 

Jonah Horowitz . Monitoring Manager . jhorowitz at looksmart.net
W: 415-348-7694 . F: 415-348-7033 . M: 415-513-7202
LookSmart - Premium and Performance Advertising Solutions
625 Second Street, San Francisco, CA 94107

 

From: nagios-users-bounces at lists.sourceforge.net
[mailto:nagios-users-bounces at lists.sourceforge.net] On Behalf Of
Stanley.HOPCROFT at deewr.gov.au
Sent: Friday, February 22, 2008 6:19 PM
To: nagios-users at lists.sourceforge.net
Subject: [Nagios-users] OT - fault tolerant default router for Nagios
host.[SEC=UNCLASSIFIED]

 

 

Dear Folks, 

I am writing to request comments on a proposal to reduce the risk of loss of
Network visibility/spurious alerts etc caused by the failure of the Nagios
host's default gateway.

When the Nagios host is connected via multiple links, it is still necessary
to ensure that data flow either both links or that somehow traffic is
diverted to the other links. 

Solutions I have rejected include 

1 Link teaming/bonding - immature in Linux 

2 HSRP/VRRP - don't want to change network structure to suit Nagios and I
can't afford fibre links from Nag to a core switch in the 'other' data
centre.

Otherwise this is a fine solution 

3 Load sharing - half the traffic will be dropped if a link fails 

Here is what I think is the best fit: an application layer (non kernel)
fault tolerant router. 

This could be implemented by 

1 a Nag service check of the reachability of the default router 

2 an event handler (run by sudo) that replaces the default router if the
check returns CRITICAL HARD. 

Your comments are very welcome. 

Thank you, 

Yours sincerely. 





Classification: UNCLASSIFIED

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