RE: [nv-l] Switch Analyzer and Layer 3 switches
2004-04-23 05:10:59
Chris,
is your switch in the "ovtopodump
-X" output?
If not ... what is the value for "
Layer 2 OID" in the "ovtopodump -X <switch>" output?
I assume something like ".... (node
is a gateway)".
If so ... is your switch in the topo
db as a router:
ovtopodump -v <switch> | grep
"^DOES IP FORWARDING:"
If so ... does your switch reports this
per SNMP:
snmpget <switch> ip.ipForwarding.0
If so .... The actual version of ITSA
will not handle Routers as Layer2 devices.
If you cannot disable routing on the
device .... only one idea .... have you tried to block snmp access to "ip.ipForwarding.0"
with an access list?
You may be able to fool NetView and
so ITSA.
Oliver
"Federico Vidal"
<fvidal AT tecsystem.com DOT ar>
Sent by: owner-nv-l AT lists.us.ibm DOT com
22.04.2004 17:54
|
To
| <nv-l AT lists.us.ibm DOT com>
|
cc
|
|
Subject
| RE: [nv-l] Switch Analyzer
and Layer 3 switches |
|
Christopher,
ONE of the means by which netview
determines a device to be a router is if it has the ipforwarding mib value
to true (1).
Disabling routing may turn it
to false.
Have you then tried itsa's importoid
command?
Federico Vidal
-----Mensaje original-----
De: Christopher J Petrina [mailto:cjp8 AT meadwestvaco DOT com]
Enviado el: Thursday, April 22, 2004 4:28 PM
Para: nv-l AT lists.us.ibm DOT com
Asunto: [nv-l] Switch Analyzer and Layer 3 switches
Greetings all,
The subject is ominous but here is my situation.
We haev some Alcatel 5024's. These devices by default have some built
in routing capabilites. As such they contain a routing table where
populated or not it is still there, however these devices are trully
only being used as a layer2 switch; but Switch Analyzer is not recognizing
them as such. The reason I found out from Magnum is that One of the
means by which netview determines a device to be a router is if it contains
a routing table. Well the moment it finds the table ont hese devices
it calls it a router and switch analyzer will not attempt to do any layer2
discovery on it.
My question is, is there a way to override Netviews discovery and
force these devices to show as layer2 devices only? In the oid_to_type
this particular device is listed as a HB (Hub Bridge) with no mention of
G(gateway).
Thanks
Chris Petrina
________________________________________________________________________
This email has been scanned for all viruses by the MessageLabs SkyScan
service._______________________________________________________________
This electronic message contains information from MeadWestvaco
Corporation or subsidiary companies, which may be confidential,
privileged or otherwise protected from disclosure. The
information is intended to be used solely by the recipient(s)
named. If you are not an intended recipient, be aware that
any review, disclosure, copying, distribution or use of this
transmission or its contents is prohibited. If you have
received this transmission in error, please notify MeadWestvaco
immediately at postmaster AT MeadWestvaco DOT com.
_______________________________________________________________________
|
|
|