RE: [nv-l] CDP and Discovery

2002-08-01 16:21:30
Subject: RE: [nv-l] CDP and Discovery
From: "Westphal, Raymond" <RWestphal AT erac DOT com>
To: "'nv-l AT lists.tivoli DOT com'" <nv-l AT lists.tivoli DOT com>
Date: Thu, 1 Aug 2002 15:21:30 -0500

I was told by Support long ago that NV used CDP as well as ARP cache info. 
I sure hope that is true. Although, it would explain this problem if NV

I don't know the answer to your MIB-II question.

It's too late for the snmpwalk. I suppose you mean NV uses the ARP entries
in the "at" or arp table. 
I'll check the router the next time it occurs.


-----Original Message-----
From: netview AT toddh DOT net [mailto:netview AT toddh DOT net]
Sent: Thursday, August 01, 2002 2:37 PM
To: Westphal, Raymond
Subject: Re: [nv-l] CDP and Discovery

"Westphal, Raymond" <RWestphal AT erac DOT com> writes:
> Hello Everyone.
> NetView 7.1.1 or 7.1.2 on AIX 4.3.3 ML10
> I have noticed a problem with discovery on two NetView servers. NetView
> fails to add Cisco switches, for example 2924 or 2950, to the map. The
> routers on the same network are on the map, are managed and are demand
> polled every 24 hours. If I telnet to the router(s) and enter the command,
> "show cdp neighbor", the switches are listed by their configured hostname
> which may or may not be the DNS name. The demand poll shows NV is querying
> the CDP cache. 

I wasn't aware that NetView leveraged CDP at all.  Doesn't it rely on
MIB-II to do all its discovery?  

Does a /usr/OV/bin/snmpwalk of the router show the management
interfaces of the switches you're seeking to discover?  If not, I
don't know that NetView would have any way of knowing the switches are

> My seed file only contains exclusions, HSRP and SNMP status poll
> entries. In other words, I do not have IP network ranges like
> 10.10.*.* in the seed file. If I add the switch IP address to the
> netmon.seed file and run the netmonaction.sh script, the switches
> are soon added to the map.

Beest Regards, 
Todd H.

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