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Re: [nv-l] PC becomes Router !!

To: nv-l@lists.us.ibm.com
Subject: Re: [nv-l] PC becomes Router !!
From: Paul <pstroud@bellsouth.net>
Date: Tue, 28 Jun 2005 09:10:03 -0400
Delivery-date: Tue, 28 Jun 2005 14:10:37 +0100
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In-reply-to: <200506281251.j5SCphZ9008793@e2.ny.us.ibm.com>
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One other quick thing, even if SNMP is enabled make sure you can run:

snmpwalk <hostname>

With no other parameters. If this does not work, make sure you have the correct
community name configured in NetView.

Paul

Davis, Donald wrote:

Gildas,
Let me take a stab at this.
You did not mention if SNMP is enabled on the PC.
If SNMP is not enabled, NetView will "assume" that the device is a router simply because you have two or more addresses resolving to the same host name. If SNMP is enabled, NetView can determine that IpFowarding is not enabled, and it will not "assume" that it is a router.

I'm guessing that if you enable SNMP on the PC, then demand poll it, it will disappear from the IP-Internet level submap.

This behavior is not new.... It's always worked that way.

Don Davis

-----Original Message-----
From: Gildas.Plouzennec@alcatel.fr [mailto:Gildas.Plouzennec@alcatel.fr]
Sent: Tuesday, June 28, 2005 4:35 AM
To: nv-l@lists.us.ibm.com
Subject: Re: [nv-l] PC becomes Router !!

The ipForwarding value is "not forawarding" and the Windows Key
"IPEnableRouter"  is 0.

I have another PC with similar configuration but without this issue.
The main difference between both PC is the one with the problem is
hosted on a blade (in IBM blade center) and the other one is a server
hosted in a "standard" box.

Gildas PLOUZENNEC



George deSocio wrote:

>
> I believe if you use regedit and navigate to:
>
> HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
>
> look for the value for IPEnableRouter;  1 means IP Forwarding is
> enabled;  if you issue the following, you can also see it:
>
> snmpget <hostname> ip.ipForwarding.0
>
>
>
> I have set this on before on machines with more than one nic card, but
> have not seen it get set by itself.
>
>
>
>
>
> Regards,
> Geo.
>
> George deSocio
> IBM Americas Support - Distributed Network Management
> Dept 46-E1ZA
> IBM B660  CC109
> HWY 54 & 600 Park Offices
> Research Triangle Park, NC  27709
>
> 919-254-2259 (T/L 444)  Fax: 919-543-7936 (T/L 441)
>
> E-Mail:  desocio@us.ibm.com
>
>
>
>
> *Leslie Clark/Southfield/IBM@IBMUS*
> Sent by: owner-nv-l@lists.us.ibm.com
>
> 06/27/2005 11:25 AM
> Please respond to
> nv-l
>
>
> > To
>       nv-l@lists.us.ibm.com
> cc
> > Subject
>       Re: [nv-l] PC becomes Router !!
>
>
>
> >
>
>
>
>
>
> Yes, it is normal. It usually means the ipforwarding is enabled
> between the interfaces on the server. If you do not want to see it at
> that level of the map, your best bet is to hide it from that submap.
> It will still show up in the segments on which it has interfaces.
>
> Cordially,
>
> Leslie A. Clark
> IBM Global Services - Systems Mgmt & Networking
> (248) 552-4968 Voicemail, Fax, Pager
>
>
> *Gildas.Plouzennec@alcatel.fr*
> Sent by: owner-nv-l@lists.us.ibm.com
>
> 06/27/2005 11:19 AM
> Please respond to
> nv-l
>
> > To
>       nv-l@lists.us.ibm.com
> cc
> > Subject
>       [nv-l] PC becomes Router !!
>
>
>
>
> >
>
>
>
>
>
> Hi all,
>
> my Netview is 7.1.3.
>
> On my network, a PC (W2K SP4) had one network interface in
> 192.168.80.x/24 and all was fine (trap well received, etc ..)
> Then I added on this PC a second network interface in 169.254.x.x/16.
> After a manual polling request, the second interface was discovered, and
> the object was added at the network level (in root submap), linked to
> the 2 IP network  (192.168.80.x/24 and 169.254.x.x/16) and in its
> properties : IPRouter, Node, Computer, Connector, Router, PC, IP.
> Before the add of the interface, the properties was :  Node, Computer,
> Connector, PC, IP.
> Note the icone used to display the PC is still the PC icone.
>
> Is it a normal behavior, I mean when a host have 2 interfaces on 2 IP
> networks, it is considered as a router ?
>
> thanks for your help.
>
> --
>
> Gildas
>
>
>
>
>

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