One of the CNAT guys asked me to post this.

1.  The NetView machine only has to placed behind a router if you plan to
use the failover mechanism.  If you are not going to have a redundant
(backup) CNAT then the NetView machine can be on the same subnet as the
normalized interface.  When you configure CNAT, just enter some address
that CNAT can ping on the normalized side so that CNAT will think the
network is "happy."

2.  Managed devices should forward their traps to NetView.  CNAT is not a
trap forwarder.

James Shanks
Team Leader, Level 3 Support
 Tivoli NetView for UNIX and NT

---------------------- Forwarded by James Shanks/Tivoli Systems on
04/26/2001 07:48 AM ---------------------------

John Mackney <john.mackney AT uk.logical DOT com>@tkg.com on 04/26/2001 05:26:26
AM

Please respond to IBM NetView Discussion <nv-l AT tkg DOT com>

Sent by:  owner-nv-l AT tkg DOT com


To:   "'nv-l AT tkg DOT com'" <nv-l AT tkg DOT com>
cc:
Subject:  [NV-L] CNAT Configuration





Anyone had experience of implementing Tivoli Comprehensive Network Address
Translator.

We specifically want to translate only the SNMP packet payloads coming from
our customers as described in the CNAT manual under the section "Coexisting
With Other NAT-Capable Devices".  We already NAT the relevant IP header
information - via routers closer to the customer network.

Specific questions we have are:

-       Must the NetView server to be placed behind a router  (effectively
one hop away from the CNAT server). One of the configuration parameters is
the IP address of the Normalised side router attached to CNAT. Can the
normalised side interface of CNAT and the NetView server not be on the same
network?

-       Should the Trap Address on monitored devices for SNMP be set to the
NetView Server's address or the CNAT servers address.

   Any help would be appreciated, as a call to Tivoli does not seam to have
   yielded any response so far/

   Thanks

   End



John Mackney

Technical Design Authority

Logical eBOC

Logical (UK) Ltd.

Tel:        +44 (0) 1753 777354

Mobile:   +44 (0) 7767 804038

Email:      john.mackney AT uk.logical DOT com








 "I'm going for fearsome here, but I just don't feel it.  I think I'm
coming across as annoying."  - Rex, from Toy Story