second nameserver with two IPs

Lightner, Jeff JLightner at
Wed Jun 8 15:27:34 UTC 2011

You can have a thousand IPs and it won't matter so long as you configure your named.conf to use a specific IP in notify-source and transfer-source.

-----Original Message-----
From: at [ at] On Behalf Of Jonathan Stewart
Sent: Wednesday, June 08, 2011 11:00 AM
To: Jeff Peng
Cc: bind-users at
Subject: Re: second nameserver with two IPs

On Tue, Jun 7, 2011 at 20:37, Jeff Peng <pengyh at> wrote:
> Hello,
> My second nameserver has tow IPs, for example,
> (They are in different CIDRs.)
> and my was pointed to these two IPs.
> Will this cause problems, for example, the duplicated notification or zone-transfer?

I would expect duplicate notifications, but that's not any problem at all.

The zone would transfer once, because a serial number check is always
done before the transfer.  If a second notification was received, a
second serial number check (via SOA record) would be done, and, when
it found the same serial number, BIND would not transfer same zone a
second time.

As Torinthiel said though: try it out, and watch your logs to see
happens specifically.

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