Thanks - some good leads to follow up on. Will report on my
success/failure.
Oliver Grant
> -----Original Message-----
> From: Xu He [SMTP:xuhe@YAHOO.COM]
> Sent: Friday, June 25, 1999 5:11 PM
> To: NV-L@UCSBVM.ucsb.edu
> Subject: Re: nameserver returned duplicate name...
>
> Oliver,
>
> I feel your pain. I have seen this a lot of times in
> my test box. At one point, I was seen about 4
> messages a second, which filled up my event log
> (initially set at 10000), in less than a hour. From
> what I saw, it seem that there was a few unmanage
> nodes printers that had a more than on ip address
> defined for it in the DNS server. It was actually
> problem with the folks administering the DNS;they fat
> fingered the data, so there were two printers
> associated with the same DNS name. Since the node
> name in Netview is normally associate with a DNS or a
> WINS name, it will try to query the DNS name. This in
> turn return two ip addresses, and confused the hell
> out of the netview box not mentioning other thing that
> connects to it. To fix it temporarily, I actually had
> to delete the printers and excluded in the seed file.
>
>
> I have also seen this with a dual NICed NT Server.
> The NT Server didn't have SNMP loaded on the server,
> and one of the NIC was at the other side of a Choke
> Router, so ping doesn't work. When Netview check with
> the DNS server, it get the IP Address of the NIC on
> the other side of the choke router. Because Netview
> couldn't demand poll or SNMP walk the NT Server, it
> never discover the other NIC. Now I have a wrong ip
> address associated with the same WINS name, Netview
> gets confused, and issue the trap.
>
> It's also possible that you have some unmanaged
> workstation that got a new DHCP lease. So check the
> address of those nodes in Netview and see if you see a
> conflict with the address you resolve using WINS or
> DNS.
>
> Hope this helps
> Xu He
>
>
> --- OGrant <OGrant@PEC.COM> wrote:
> > Platform: Netview 5.1/NT 4.0, sp3
> >
> > This one's under the heading of "annoying, not
> > fatal" - I'm receiving the
> > following Netview-internal trap: "nameserver
> > returned duplicate name
> > xxx.xxx.0.50 for interface xxx.xxx.96.1; interface
> > xxx.xxx.96.1 will be
> > deleted" - netview points to a router as the being
> > the source of the
> > problem, although I'm receiving the same trap from
> > other devices (windows
> > workstations, etc.) Over several days' time,
> > netview has generated this
> > trap from the router *11,000+* times.
> >
> > Issue: we're running WINS on our NT network, not DNS
> > (the term "nameserver"
> > suggesting DNS - correct?)
> >
> > Obviously a conflict occuring here - I've checked
> > practically the entire
> > network for an occurance of xxx.xxx.0.50, but none
> > have appeared (thought
> > being that a rougue device was once configured with
> > this ip address, but
> > then never properly re-configured -- perhaps it's
> > continuing to broadcast
> > this address somehow.)
> > Checked my local hosts file, and removed all
> > references to the router, and
> > address xxx.xxx.96.1. - problem persisted, ruling
> > out a local name
> > resolution error.
> > This Cisco 3620 router itself is properly configured
> > with an interface of
> > 96.1 - furthermore, a "show snmp" confirms that
> > Netview, not the router
> > itself, is generating the trap.
> >
> > - For those who've experienced a similiar problem,
> > is this a symptom of a
> > WINS database somehow being hosed/corrupted? Even
> > though the router's
> > obviously not a WINS client, I checked both primary
> > and secondary WINS
> > servers on the off-chance...both appear clean.
> >
> > I've even gone so far to run Etherpeek on my Netview
> > server to do some
> > packet-level analysis and hopefully gather some
> > clues as to the source, but
> > so far - nothing.
> >
> > Any ideas? A Netview/NT bug, perhaps? (I know, I
> > know - upgrade to 5.1.1.
> > But that's a another story.)
> >
> > Cheers,
> > Oliver Grant
> > Performance Engineering Corporation
> >
>
> ===
> Xu He
> Consulting Services Engineer
> Network Solutions, Inc
> http://www.netsol.com/consulting
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