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RE: [nv-l] Managing routers with duplicated IP address

To: nv-l@lists.us.ibm.com
Subject: RE: [nv-l] Managing routers with duplicated IP address
From: Oliver Bruchhaeuser <oliver.bruchhaeuser@de.ibm.com>
Date: Mon, 26 Apr 2004 10:15:47 +0200
Delivery-date: Mon, 26 Apr 2004 09:27:46 +0100
Envelope-to: nv-l-archive@lists.skills-1st.co.uk
In-reply-to: <4083C9CF00001184@pop3.es.tisadm.net>
Reply-to: nv-l@lists.us.ibm.com
Sender: owner-nv-l@lists.us.ibm.com

the %-entries in the seefile will frist become active after a netmon restart.
A "netmon -y" only will not do the job.

You may also want to play with the netmon option in /usr/OV/conf/netmon.conf:
# Set to TRUE to report duplicate IP addresses, don't remove them.


"Gerardo Ruiz Garcia" <gerardo_ruiz@inicia.es>
Sent by: owner-nv-l@lists.us.ibm.com

23.04.2004 09:13
Please respond to

RE: [nv-l] Managing routers with duplicated IP address

I have the same problem with the WAN conexions Frame_Relay. The configuration
of a duplicate IP addess in two routers is for CVP+ feature implemented
for backup reason. In this way if a conexion fails other router with the
same IP addess configured takes the control. Both IP are Admin Up. The topology
map doesn´t r show the right situation, sometimes the conexjon is in one
router and sometimes in the other one, depens of teh demandpool secuence.
I have try HSRP feature and doen`t work.

>-- Mensaje Original --
>From: "Evans, Bill" <Bill.Evans@hq.doe.gov>
>To: "'nv-l@lists.us.ibm.com'" <nv-l@lists.us.ibm.com>
>Subject: RE: [nv-l] Managing routers with duplicated IP address
>Date: Thu, 22 Apr 2004 16:32:43 -0400
>Reply-To: nv-l@lists.us.ibm.com
>Yes, it's possible.  It's absolute necessary with the HSRP support. This
from /usr/OV/conf/netmon.seed.

#    Hot Standby Routing Protocol (HSRP) Support
#      HSRP interfaces may be specified here for netmon to acknowledge them.
#      Onl
> the public IP address need be entered.  
#      Use the prefix '%', and use the same syntax for ranges and wildcards
#      described above for positive seed entries.  For instance, if

#      is the IP address of the HSRP interface that
>switches between two
#      routers, enter,
#         %

Other reasons may exist for doing so and NV can handle accidental duplicate
interface adddresses on routers but it doesn't like it.  It definitely won't
handle routers whose prim
>ry interface addresses are duplicated; as you've
seen it will delete one of them.  To give you a better answer we need to
know why there are duplicate addresses.  The solution may be to use CNAT
it may be to identify the devices as HSRP or it ma
> be simply to clean up
your network interface definitions.

If you search the archives for this mailing list you will see a few cases
where the HSRP support is used to handle duplicate IF addresses present
other reasons.  

You simply have
>'t given enough information for anyone to send an
intelligent answer.  Why do your routers have duplicate addresses?  

Bill Evans
Tivoli NetView Support for DOE

-----Original Message-----
From: Marcos Antonio Pezzutti Filho [m
Sent: Thursday, April 22, 2004 3:58 PM
To: 'nv-l@lists.tivoli.com'
Subject: [nv-l] Managing routers with duplicated IP address

Dear friends,

Our Environment:

AIX 4.3.3 ML-10
Tivoli Netview 7.1.4
Tivoli Fra
>ework 3.7.1
ITEC 3.9

We´d like to know if it´s possible to manage a router with an IP address
duplicated on another router ?

Thanks in advance

Marcos Antonio Pezzutti Filho
Santander Banespa - Infra-Multiplataforma
* Fone: 5854-6339 * Fax:
pezzutti@banespa.com.br <mailto:pezzutti@banespa.com.br>

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