ADSL modem checking

[Paul Weaver]

I don't have any pcs with default routes out of two network cards to
test, but perhaps using "ping -I eth0 www.yahoo.co.uk" and "ping -I eth1
www.yahoo.co.uk" would work?

--
Paul Weaver	
Systems Development Engineer
News Production Facilities, BBC News
Work:	020 822 58109
Room 1244  Television Centre,
Wood Lane, London, W12 7RJ



> -----Original Message-----
> From: nagios-users-bounces at lists.sourceforge.net 
> [mailto:nagios-users-bounces at lists.sourceforge.net] On Behalf 
> Of J. Bakshi
> Sent: 27 August 2008 12:13
> To: nagios-users at lists.sourceforge.net
> Subject: [Nagios-users] ADSL modem checking
> 
> 
> Hi all,
> 
> nagios is running here at my local server with 
> ssh,mysql,smtp,http monitoring.
> 
> And now I like to use *nagios* to monitor my 2 ADSL modems.
> 
> The environment is as below
> 
>     1> my linux server has 3 lan crads eth0 ( connected with 
> hub ) , eth1, eth2
> 
>     2>  There is an ADSL modem 220BX connected with eth1. ( 
> 8MB connection used as primary )
>         This modem is providing Internet connection from 
> provider1 (say)
> 
>          Another modem ADSL modem TAD100 connected with eth2. 
> ( 512 KB connection used as backup )
>         This modem is providing Internet connection from 
> provider2 (say)
> 
> 3> simple check_ping to modem IP  can monitor the 
> accessibility to both
> the  modem. BUT how can I check that the internet connection 
> is really 
> provided by the modems. simple ping to yahoo.com can't solve 
> the problem as any one modem is used as default route at a 
> particular time. How can I check the internet is really 
> present on the other modem not used as default route ? In 
> other words say eth1 is used as default route and the traffic 
> is going through ADSL modem 220BX. Then How can I check that 
> the internet connection is alive at eth2 ?
> 
> Many thanks in advanced.
> 
> -- 
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> Joydeep Bakshi, Linux System Admin
> Kolkatainfoservices Pvt Ltd,
> 23A Royd Street, Kolkata 700016, India
> Work Phone 91 033 40014784
> http://infoservices.in/ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 
> 
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