redundant mesh network monitoring

[Peter Hicks]

Hi Kerry

Kerry Milestone wrote:

> I have set up several hosts with multiple addresses as service dependencies
> so that all links have to be up for a host(router) to be up.   While it
> does work, I was wondering if anyone else configured Nagios to deal with
> multiple paths to a multi addressed host?  Is there a best practice for
> this?  The config files are a bit bloated now I think.

Loopbacks on Cisco routers are good - accessible from any interface, you just 
need to make sure routes to them are published in your routing protocol. 
Combine this with monitoring interface status, and you can tell when an 
interface has gone down, for example.

I'm close to implementing this on a bunch of our routers, which have an 
Internet-facing IP address for the host, a VPN-service specific loopback 
address which I monitor as the service "vpn-service", and two tunnel 
interfaces, one of which can be "down".

HTH


Peter.

-- 
Peter Hicks | e: my.name at poggs.co.uk | g: 0xE7C839F4 | w: www.poggs.com


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