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Re: Strange interface discovery behavior???

To: nv-l@lists.tivoli.com
Subject: Re: Strange interface discovery behavior???
From: "Leslie Clark" <lclark@us.ibm.com>
Date: Mon, 6 Aug 2001 22:35:20 -0400
Mark, check for reverse name resolution on those extra addresses. That
would do it,
if they were ever up.  I take it that you have pulled the address table for
that device
and they don't show up there (monitor..network configuration..addresses)?
If they are
not in the address table, netmon had to hear from them at some point, maybe
on a
PC, and it would then lookup those addresses. If they resolve to a router,
it will add
them.

Cordially,

Leslie A. Clark
IBM Global Services - Systems Mgmt & Networking
Detroit



                                                                                
         
                    "Scherting,                                                 
         
                    Mark"                To:     "NV-L (E-mail)" <nv-l@tkg.com> 
         
                    <mscherting@st       cc:                                    
         
                    ate.mt.us>           Subject:     [NV-L] Strange interface 
discovery 
                    Sent by:              behavior???                           
         
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                    .com                                                        
         
                                                                                
         
                                                                                
         
                    08/06/01 06:03                                              
         
                    PM                                                          
         
                    Please respond                                              
         
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Hello to the List,

I've encountered puzzling interface discovery behavior and hope someone
here
can enlighten me as to what's going on.  I'm running NV 6.01 on AIX 4.3.3.

Netview has (re)discovered one of our Cisco 4500 routers with three normal
and two critical interfaces where we believe there should be only three
normal interfaces.  This router has four Ethernet interfaces, and one
FastEthernet interface.  Two of the Ethernet interfaces are admin down with
no ip addresses configured.  Status of the two configured Ethernet and the
fast Ethernet interfaces is normal.  The router does have several static
routes configured, including one to the 198.179.249.250 address Netview
assigned to a bogus interface.

My question(s):  Why has Netview discovered two extra Ethernet2 "critical"
interfaces with bogus MAC addresses and put ip addresses on them? What can
I
do to remedy this condition?

Here's part of the ovobjprint -s of the router.  I have the "red"
interfaces
unmanaged to keep the bogus status from propagating.



OBJECT: 81079

           FIELD ID       FIELD NAME                               FIELD
VALUE
           261                      TopM Interface Count
 5
           267                      TopM Interface List
 "FastEthernet0 Up
10.192.25.11    255.255.255.0   0x00603E114DC0  ethernet csmacd     "

"Ethernet0  Up
10.192.106.1    255.255.255.0   0x00603E114DC1  ethernet csmacd     "

"Ethernet2  Up
198.179.249.249 255.255.255.0   0x00603E114DC2  ethernet csmacd     "

"Ethernet2
Unmanaged  198.179.249.250 255.255.255.0   0x00000C07AC01  ethernet csmacd
"

"Ethernet2
Unmanaged  198.179.249.251 255.255.255.0   0x00000C07AC01  ethernet csmacd
"
           278                      XXMAP Protocol List
 "IP"
           364                      IP Name
 "colonialbldg"
           1843                     default IP Symbol List
 188766



Thanks in advance for your insight.

Mark Scherting
State of Montana
Information Technology Services Division
(406) 444-0117
mscherting@state.mt.us
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