Re: Cisco ip unnumbered interfaces

Actually, the problem of unnumbered interfaces incorrectly contributing
to the status of the router was fixed in 5.1.1 after all of these years. They
cheated, I think, but apparently the way it works is, for every unnumbered
(and thus unpingable) interface  on a device,  the number of interfaces
that must be down before the parent device is red is decremented by one.
The interface may be green, but if no other interface on the device is
reachable,
then the device will show red on the IP Internet level submap. Pretty clever,
eh? I still want regular status polling via snmp, though.

Cordially,

Leslie A. Clark
IBM Global Services - Systems Mgmt & Networking




The Netview netmon daemon doesn't "ping" these interfaces because it can't
ping unnumbered interfaces.  However, it could do an snmpget to get the
admin and oper status, but it is not configured to do so; thus, netmon
discovers them and puts them into the map, but they are always green.

I'd recommend creating your own script that does this polling and changes
the NV symbols accordingly.  I started to do so until I realized there were
problems with NV correctly discovering all of our unnumbered interfaces.
Thus, I have been working with NV support on the discovery of these
unnumbered interfaces since then.

Joe Prokott - West Group
Network Architect
610 Opperman Drive
St. Paul, MN  55123
Phone: 651-687-4536
Fax: 651-687-6946
E-mail: joe.prokott AT westgroup DOT com


-----Original Message-----
From: Alejandro Mechoulam [mailto:amechoul AT BMA.COM DOT AR]
Sent: Friday, July 30, 1999 12:04 PM
To: NV-L AT UCSBVM.UCSB DOT EDU
Subject: Cisco ip unnumbered interfaces


My router plataform in CISCO, my WAN is Frame-Relay
I hava my WAN configured with ip unnumbered loopback using net 10.0.0.0
255.255.255.0, one subnet per router
Example with 3 routers:

     10.99.41.1 -------------------------------------- 10.0.41.1
                    |
                                                            |
                                                            |
                                                   10.21.41.1
(the ip address are of the loopback interfaces in each router)

The problem is netview discouvers the interfaces and link between them, but
says:
     isInterface, isCard,isSerialInterace
but is not ip, then the ipstatus is always normal, even if i put it down on
pourpose.

Had anybody lead whith this problem?
Is there any flag for netview to treat them in a different way  (not to
ping, the discouvered ip for all the interfaces are 0.0.0.0).

Bye (I will be watching my "always" green map).