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Re: [nv-l] How to handle HSRP addresses in DNS.

To: nv-l@lists.tivoli.com
Subject: Re: [nv-l] How to handle HSRP addresses in DNS.
From: "Dietmar Gaulhofer" <DIETMAR_GAULHOFER@at.ibm.com>
Date: Wed, 6 Nov 2002 16:00:23 +0100

I think its not a good idea to put in virtual-ip-addresses to DNS/Hosts. In
a "perfect world" HSRP IP's should be shown on that
router-object who is actually "holding" it. And if there is an HSRP move
from Router A to B - your "name resolution"
will then be to the "wrong" Router - and then is the question who "wins" -
the HSRP function check
with this special MAC address, or the Name Resolution.....



"Westphal, Raymond" <RWestphal@erac.com> on 06.11.2002 15:43:26

To:    "NV List (E-mail)" <nv-l@lists.tivoli.com>
Subject:    [nv-l] How to handle HSRP addresses in DNS.

Hello Everyone.

NV 7.1.3 on AIX 4.3.3 ML10.

When I run my weekly database cleanup job, ovtopofix routinely complains of
a router that needs to be deleted. I think I may have discovered the reason
for the problem this morning. NV had 8 router objects on the map for this
single router. In all but one of the objects, the Selection Name of the
router was one of the HSRP virtual IP addresses.

As an experiment, I added all the HSRP IP addresses to the /etc/hosts file
with the same name, such as bldgx-router-hsrp. I then demand polled each of
the 8 objects. All of the duplicate objects were deleted and the single
router with the correct Selection Name remained.

I know it is recommended that each interface be in the DNS. The question is
this how to handle the dozen(s) of HSRP virtual IP addresses on all my


Ray Westphal
Enterprise Rent-A-Car

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