Hi,
Thanks for your questions!
Just a few things...
When you say "disable" the B-C interface do you mean unmanaged under NNM or just to disable the interface on the router/switch as an admin would do?
If you unmanage it from NNM, it won't show any alarms, because it is supposed to be a useless one.
For NNM to know the right status of each component, router A should have one mgmt interface UP and managed, also the ports connecting to switch B, so it can verify the status of B and then B can have its own management interface + the port to switch C as managed under NNM.
When you right click on a node to ping it, it is going to resolve the name for the node, to its IP address and then run the icmp tests. Is it resolving the name? Or is it using just the IP instead?
Remember NNM has a threshold configured in order to make sure a node shows as down after a certain number of polls/pings, we must make sure that threshold is set to an acceptable value, let's say 2 minutes i.e.
All the managed nodes should have name resolution configured for the exact name you want under NNM or Node Bank and the management IP address you are using, this is VERY important.(can be done through DNS or local resolv file, I would recommend DNS dedicated for management purposes).
Also, in the Alarm Browser, you can check on Event Configuration, for the particular event (Node Down or IF_Down) to make sure these are configured to log AND show alarms, perhaps they are only being logged and nothing else. Also make sure it say "All sources" there, instead of particular set of pre configured nodes.
Let's see if this helps a little!
vlan52
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