Antwort: RE: wrong interfaces added to CISCO LS1010

[Uwe.Richter@synthesis.de]

This is a multipart message in MIME format.

You can build a SNMP-View on LS1010 without  IpNetToMedia-Table.

Uwe







"Robert Ingersoll" <bob.ingersoll@usaa.com>
Gesendet von: owner-nv-l@tkg.com
20.12.2000 17:11
Bitte antworten an IBM NetView Discussion

 
        An:     "'IBM NetView Discussion'" <nv-l@tkg.com>
        Kopie:  (Blindkopie: Uwe Richter/Synthesis)
        Thema:  RE: [NV-L] wrong interfaces added to CISCO LS1010

We had the same problem (IY14228).  HSRP support was rewritten in 6.0 and
the problem results from NetView thinking that every ARP (IpNetToMedia)
entry with an HSRP MAC address (e.g., 00000C07AC0B)is an HSRP interface.
The fix for IY14228 is in test and updates netmon to provide a -V option 
to
supress this method of discovering HSRP interfaces.  Of course, if you use
this fix then you'll need to define HSRP interfaces in your seed file. 
This
will have to do until the next Tivoli rewrite of HSRP support.

The problem only occurs on some of our LS1010s and we suspect an LS1010
configuration option may be the cause of these 'false' HSRP ARP entries.
But we haven't been able to confiirm this.

--
Bob Ingersoll
USAA Information Technology Company (ITCO)
Bob.Ingersoll@usaa.com
Tel +1 210 456 3739
Fax +1 210 456 5858


-----Original Message-----
From: FITZINGER Richard [mailto:richard.fitzinger@it-austria.com]
Sent: Wednesday, December 20, 2000 7:26 AM
To: NetView User Forum (E-Mail)
Cc: ADAMCZYK Herbert; CHVOJKA Markus; NEMEC Martin; REIBENSCHUH Alfred;
RESETERITS Erwin; SCHIFFINGER Ralph; SCHMIKAL Manfred
Subject: [NV-L] wrong interfaces added to CISCO LS1010


We have noticed a problem regarding Cisco LS1010 Switches and are now 
asking
for advice to track it. Configuration: Netview 6.0.1 on two servers (AIX
4.3.2) and LS1010 Rel. 12.0 (several patch levels).

Most of the LS1010 have several interface cards showing up addresses of 
NMS
stations!

e.g. a switch with IP Address 10.1.1.1 (Interface Index 8) has also
interface cards for 10.3.1.119 and 10.12.12.12 (both are PC's that have 
been
connected to that device via telnet or have done "snmp get" operations). 
All
these interfaces refer to the same interface index.

If we delete one of the wrong interfaces and demand poll the node, it adds
the interface immediately. Deleting the  node and rediscovering it leads 
to
the same result. In some cases we have noticed that the "wrong" addresses
show up in the MIB2-"IpAddrTable". Anyway, if we do an snmpwalk from the 
top
10.3.1.119 shows up only two times: in IpNetToMedia table and "at Table". 
I
guess netview does not use the "at" table anymore? There are a lot of 
other
entries in these tables, thus we don't know why only these two addresses 
are
found to be worth being an interface...

To make things even more complicated: discovering LS1010 devices with an
"old" netview 5.1.2 server shows...everything ok.

"call support" would of course be a good advice but right now I'm not sure
wether to call CISCO or Tivoli? 

tia for any help

regards,
richard fitzinger
it-austria
_________________________________________________________________________
NV-L List information and Archives: http://www.tkg.com/nv-l
_________________________________________________________________________
NV-L List information and Archives: http://www.tkg.com/nv-l


_________________________________________________________________________
NV-L List information and Archives: http://www.tkg.com/nv-l




You can build a SNMP-View on LS1010 without  IpNetToMedia-Table.

Uwe

"Robert Ingersoll" <bob.ingersoll@usaa.com> Gesendet von: owner-nv-l@tkg.com 20.12.2000 17:11 Bitte antworten an IBM NetView Discussion

An:        "'IBM NetView Discussion'" <nv-l@tkg.com>         Kopie:        (Blindkopie: Uwe Richter/Synthesis)         Thema:        RE: [NV-L] wrong interfaces added to CISCO LS1010

We had the same problem (IY14228).  HSRP support was rewritten in 6.0 and
the problem results from NetView thinking that every ARP (IpNetToMedia)
entry with an HSRP MAC address (e.g., 00000C07AC0B)is an HSRP interface.
The fix for IY14228 is in test and updates netmon to provide a -V option to
supress this method of discovering HSRP interfaces.  Of course, if you use
this fix then you'll need to define HSRP interfaces in your seed file.  This
will have to do until the next Tivoli rewrite of HSRP support.

The problem only occurs on some of our LS1010s and we suspect an LS1010
configuration option may be the cause of these 'false' HSRP ARP entries.
But we haven't been able to confiirm this.

--
Bob Ingersoll
USAA Information Technology Company (ITCO)
Bob.Ingersoll@usaa.com
Tel +1 210 456 3739
Fax +1 210 456 5858


-----Original Message-----
From: FITZINGER Richard [mailto:richard.fitzinger@it-austria.com]
Sent: Wednesday, December 20, 2000 7:26 AM
To: NetView User Forum (E-Mail)
Cc: ADAMCZYK Herbert; CHVOJKA Markus; NEMEC Martin; REIBENSCHUH Alfred;
RESETERITS Erwin; SCHIFFINGER Ralph; SCHMIKAL Manfred
Subject: [NV-L] wrong interfaces added to CISCO LS1010


We have noticed a problem regarding Cisco LS1010 Switches and are now asking
for advice to track it. Configuration: Netview 6.0.1 on two servers (AIX
4.3.2) and LS1010 Rel. 12.0 (several patch levels).

Most of the LS1010 have several interface cards showing up addresses of NMS
stations!

e.g. a switch with IP Address 10.1.1.1 (Interface Index 8) has also
interface cards for 10.3.1.119 and 10.12.12.12 (both are PC's that have been
connected to that device via telnet or have done "snmp get" operations). All
these interfaces refer to the same interface index.

If we delete one of the wrong interfaces and demand poll the node, it adds
the interface immediately. Deleting the  node and rediscovering it leads to
the same result. In some cases we have noticed that the "wrong" addresses
show up in the MIB2-"IpAddrTable". Anyway, if we do an snmpwalk from the top
10.3.1.119 shows up only two times: in IpNetToMedia table and "at Table". I
guess netview does not use the "at" table anymore? There are a lot of other
entries in these tables, thus we don't know why only these two addresses are
found to be worth being an interface...

To make things even more complicated: discovering LS1010 devices with an
"old" netview 5.1.2 server shows...everything ok.

"call support" would of course be a good advice but right now I'm not sure
wether to call CISCO or Tivoli? 

tia for any help

regards,
richard fitzinger
it-austria
_________________________________________________________________________
NV-L List information and Archives: http://www.tkg.com/nv-l
_________________________________________________________________________
NV-L List information and Archives: http://www.tkg.com/nv-l


_________________________________________________________________________
NV-L List information and Archives: http://www.tkg.com/nv-l