Re: [NV-L] NetView Device Name Attributes
2007-09-25 08:09:03
If demand poll is not resolving the
hostname, then you have a name resolution problem to fix. If it resolves
from the command line, then I would delete and rediscover the object. Put
the hint for it at the top of you seed file. Stop netmon. Delete
it. And restart netmon. And remember that the device name must
resolve the same way both backward (IP address to hostname) as well as
forward (hostname to IP address). There is a tool called nvgethost
in /usr/OV/bin which may help.
And HSRP addresses shown standalone
is usually a symptom of not having SNMP access to one or both of the
devices the interface is really on.
If you have 7.1.5 there has been a lot
of maintenance in the HSRP area since it came out. You need to be
current whether on 7.1.5 or 7.1.4
James Shanks
Level 3 Support for Tivoli NetView for UNIX and Windows
Network Availability Management
Network Management - Development
Tivoli Software, IBM Corp
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Thanks James.
I'm using nvdbformat to create an inventory of all devices
in NetView. My output shows some devices with their management IP
address used as their Selection Name and their host name used as their
IP Hostname. Demand Poll didn't resolve the Selection Name to a host
name and we're using /etc/hosts for resolution followed by DNS.
I've also noticed that some HSRP virtual IP addresses
are being represented as a Node, which is throwing our total device count
off.
Stephanie
James Shanks <jshanks AT us.ibm DOT com> wrote:
What are you really trying to find out here? What problem
are you trying to solve?
netmon chooses these names based on what you have set up in your network,
and uses them to create objects and fields on those objects in the object
database.
Remember that NetView represents devices as objects in a set of interconnected
databases. And there are lots of things besides devices (networks, segments,
interfaces, smartsets, etc.) in those databases. "Selection Name"
is the internal name NetView uses for one of those objects, and how they
are constructed is determined by what kind of an object we are talking
about.
If name resolution (DNS, etc/hosts, what have you) is active, then netmon
will determine the name of a device by using the system routine gethostbyaddr.
This value is then used for IP Hostname and IP Name, which are often the
same. And the Selection Name will then be set as something like "myhost.mydomain.com"
in the object database instead of just an IP address. If these devices
respond to SNMP then the interface name is returned by a query of the MIB-2
interface table, so that interface Selection Names become something like
"myhost.mydomain.com:en0". Otherwise, it's all just a number
from that table. Similarly routerSysName is determined by SNMP based on
what the router responds when queried.
If you had no name resolution and no SNMP, all your device objects would
be individual IP addresses and your map would look very strange because
then netmon would have to guess about how everything is connected.
James Shanks
Level 3 Support for Tivoli NetView for UNIX and Windows
Network Availability Management
Network Management - Development
Tivoli Software, IBM Corp
ss cc <steph_cornish AT yahoo DOT com>
ss cc <steph_cornish AT yahoo DOT com>
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09/24/2007 04:43 PM
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All,
We're running NetView 7.xx on Solaris and I'd like to know how is "Selection
Name", "IP Hostname", "IP Name", and "routerSysName"
determined? Why so many ways to get the devices name and where are the
names used in NetView? Right now I can see some of these names when I run
Display Object Information on our devices.
TIA,
Stephanie
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