[NV-L] sec:unclas Switch Analyzer

["Jermyn, Michael PO" <Michael.Jermyn@defence.gov.au>]

Leslie,

have a few queries re ITSL2 and cisco and nortel devices.

I believe that ITSL2 requires your kit to support RFC1493, and "maps" the L2 connections with the MAC Fwding table of the device.

Our devices have the 'default' configuration of 5mins as the timeout for the Mac Fwd table for cisco and nortel kit. We are seeing the L2 connections appearing and disappearing continually on the network as the table ages out.

Is this normal behaviour and and how can we overcome it?

One suggestion has been to open out the Mac Fwding table timeout to somewhere between 15 mins and 3 hrs. Our network people are uneasy about reconfiguring the timeout of every device on our network to see if this works.

 

Any ideas/suggestions?

 

Regards,

 

Mick Jermyn
Network Management Systems Administrator
DNOC-1B-118
HMAS Harman Canberra ACT 2600
Phone: (02) 6127 8277
Fax: (02) 6127 8239
Email: michael.jermyn@defence.gov.au
Contractor to Defence
IMPORTANT: This e-mail remains the property of the Australian Defence Organisation and is subject to the jurisdiction of section 70 of the Crimes Act 1914. If you have received this e-mail in error, you are requested to contact the sender and delete all copies.

 

-----Original Message-----
From: nv-l-bounces@lists.ca.ibm.com [mailto:nv-l-bounces@lists.ca.ibm.com]On Behalf Of Leslie Clark
Sent: Tuesday, 18 July 2006 1:57
To: Tivoli NetView Discussions
Subject: Re: [NV-L] Switch Analyzer and 3Com4228G

As I understand it, multiple vlans are implemented  in SNMP by Cisco equipment by means if community-string indexing. ITSA supports this. If that device implements multiple vlans the same way, then it should work. If it does it in some other proprietary way, then you will only see stuff for the default vlan.

Cordially,

Leslie A. Clark
IT Services Specialist, Network Mgmt
Information Technology Services Americas
IBM Global Services
Detroit

James Shanks/Raleigh/IBM@IBMUS
Sent by: nv-l-bounces@lists.ca.ibm.com

07/17/2006 11:32 AM

Please respond to
Tivoli NetView Discussions <nv-l@lists.ca.ibm.com>

To	Tivoli NetView Discussions <nv-l@lists.ca.ibm.com>
cc
Subject	Re: [NV-L] Switch Analyzer and 3Com4228G

Are you sure you have the correct community string in snmpconf?
Can you get it to respond to an snmpwalk of the bridge MIB?  If this fails
     snmpwalk <IP address of switch> dot1dBridge
but this works
     snmpwalk -c <community>  <IP address of switch> dot1dBridge
then you need to update your SNMP options.


You could also try loading \usr\ov\snmp_mibs\rfc1493-bridge.mib  (loadmib)
and then querying the device using the MIB browser (browser) for things
under .iso.org.dod.internet.mgmt.mib-2.dot1dBridge (.1.3.6.1.2.1.17)


James Shanks
Level 3 Support  for Tivoli NetView for UNIX and Windows
Tivoli Software / IBM Software Group


                                                                         
            "Baturin Dmitry"                                              
            <DBaturin@BCC.RU>                                            
            Sent by:                                                   To
            nv-l-bounces@list         <nv-l@lists.ca.ibm.com>            
            s.ca.ibm.com                                               cc
                                                                         
                                                                  Subject
            07/17/2006 06:51          [NV-L] Switch Analyzer and          
            AM                        3Com4228G                          
                                                                         
                                                                         
            Please respond to                                            
             Tivoli NetView                                              
               Discussions                                                
            <nv-l@lists.ca.ib                                            
                 m.com>                                                  
                                                                         
                                                                         




Hello ALL!
I have a small question about Tivoli Switch Analyzer 1.3:
We are using Tivoli Switch Analyzer 1.3 and Windows 7.1.4 on Windows 2003
server.
We can’t discover VLAN information from 3Com4228G switches, but have
successful VLAN discovery from Cisco switches.
Can Tivoli Switch Analyzer 1.3 discover VLAN info from 3Com4228G?

Thank you.
Dmitry Baturin
_______________________________________________
NV-L mailing list
NV-L@lists.ca.ibm.com
Unsubscribe:NV-L-leave@lists.ca.ibm.com
http://lists.ca.ibm.com/mailman/listinfo/nv-l (Browser access limited to
internal IBM'ers only)

_______________________________________________
NV-L mailing list
NV-L@lists.ca.ibm.com
Unsubscribe:NV-L-leave@lists.ca.ibm.com
http://lists.ca.ibm.com/mailman/listinfo/nv-l (Browser access limited to internal IBM'ers only)

_______________________________________________
NV-L mailing list
NV-L@lists.ca.ibm.com
Unsubscribe:NV-L-leave@lists.ca.ibm.com
http://lists.ca.ibm.com/mailman/listinfo/nv-l (Browser access limited to 
internal IBM'ers only)