Richard -
Are you really quite new to NetView?
Take a look at your NetView map. Notice the connections? Notice how on
the IP Internet first-level map routers are drawn with a diamond, while
regular boxes, even those with more than one interface are drawn as
squares? NetView knows your IP topology (Layer three in the OSI model).
Knowing the topology is one f the major features of NetView. Otherwise you
could just replay it with a script that pings interfaces. netmon
determines the topology with SNMP and stores it. So yes, it surely does
know the difference between a router interface and a server one. ( Add on
the New Tivoli Switch Analyzer and NetView will see Layer 2 as well).
Basically, when an interface stops responding to ping, you get an
Interface Down event. If that is the only interface on the box, that is
followed by a Node Down for that box. If there is more than one, you get
a Node Marginal or a Router Marginal, depending on the nature of the box,
which was previously determined by netmon's SNMP configuration polling.
When they are all down, you get a Node Down or Router Down, as
appropriate. If you have Router Fault Isolation enabled in netmon (-K1)
then netmon may issue a Router Unreachable if all interfaces to it cannot
be pinged, and then he will issue a Network Unreachable for the devices on
the back side and stop issuing events for the individual boxes there until
the router is available again.
James Shanks
Level 3 Support for Tivoli NetView for UNIX and NT
Tivoli Software / IBM Software Group
Richard_C_Barr@reliantenergy.com
08/15/2002 01:26 PM
To: nv-l@lists.tivoli.com
cc:
Subject: [nv-l] Difference between Network Node & Network
Interface
Hi all,
What is the difference between a network node and a network interface.
Netview v7.1.2 forwards events to Tivoli Enterprise Console in the form of
TEC_ITS_INTERFACE_STATUS
and
TEC_ITS_NODE_STATUS
Is it possible Netview can distinguish between a Server/(node) and a
Router/interface?
My guess is, Netview sees everything as an interface, a router, a server
interface, etc.
So, what is up with the network node?
thanks in advance....
Richard C. Barr
Sr. Systems Programmer
IT - Nerve Center
Reliant Energy HL&P
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