You might want to try "ip a" vs ifconfig.   RHEL7 uses Network Manager and in 
the past I've found some things don't show up in ifconfig output when doing 
alias/virtual interfaces.  

Usually even when other products (e.g. Oracle RAC/GRID) create virtual 
interfaces they still show up as valid interfaces at host level.   I've not 
tried PCS/Corosync.

You might also look at arp output to see if it shows any traffic on a specific 
MAC.


-----Original Message-----
From: bind-users-boun...@lists.isc.org 
[mailto:bind-users-boun...@lists.isc.org] On Behalf Of Phil Mayers
Sent: Wednesday, March 16, 2016 5:14 AM
To: bind-users@lists.isc.org
Subject: Re: PCS, Corosync, Pacemaker, and Bind

On 15/03/16 23:06, Mike Bernhardt wrote:

> So, I'm hoping that either
> 1) There is a way to tell BIND to use an IP address that is not on an 
> interface, or

I don't think there is.

I can think of all kinds of horrible workarounds - iptables SNAT, shell script 
doing a config-change & rndc reconfig on pcs failover.

But in general I'd agree with what Tony Finch said - give some thought to why 
you're caring about these source IPs.

TBH having used pcs/corosync I'm really curious what your use-case is. 
It seems massive overkill for having highly-available DNS.
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