[monit] How to configure a multi-homed host check?

[Landon Cox]

Hi monit users,

I'm trying to figure out the configuration syntax to have monit check  
the interface health of a machine with two NICs, but can't find any  
examples.

Ideally, I'm looking for something along the lines of:

check host tweedledum with address 10.0.0.20 192.168.5.200
    if failed icmp type echo count 3 with timeout 5 seconds then alert
    group tweedledum

the above example is erroneous because there's no way (that I know of)  
to specify two addresses on a single check host.

The closest I can get is two complete check host statements such as:

check host tweedledum-eth1 with address 10.0.0.20
    if failed icmp type echo count 3 with timeout 5 seconds then alert
    group tweedledum

check host tweedledum-eth0 with address 192.168.5.100
    if failed icmp type echo count 3 with timeout 5 seconds then alert
    group tweedledum

But that won't do what I want to do which is:  alert only if both  
interfaces are unreachable, but if one interface is unreachable and  
the other is reachable, I don't want an alert.

Is there a way to say "AND" everything in a group, so that if one  
fails, the group fails or conversely, only if all services in a group  
fail would the group be considered "failed" and some action performed?

What would the appropriate syntax be to achieve the behavior  
described, specifically the 2-NIC scenario?

Thanks,

Landon