Chapter 11: Managed Nodes - Tavve zoneranger User Manual

Chapter 11: Managed Nodes

For all node-based ZoneRanger models (e.g. ZR-50, ZR-200, and ZR-500), the majority of the proxy
and autonomous management services are available only to the set of nodes (a.k.a. devices) that have
been designated as managed. In each case, the model number indicates the maximum number of nodes
that can be managed by a given ZoneRanger.
In order for a node to be managed, it must first be discovered. Discovery, in the context of ZoneRanger,
is the process whereby a ZoneRanger analyzes its surrounding network and populates its database with
the nodes, interfaces, subnets, and TCP ports that are encountered. Depending on the discovery options
settings the discovery process can range from minimal (i.e. simply analyze a list of seed node addresses
in an attempt to identify devices that support multiple IP addresses) to fairly aggressive (e.g. ping
ranges, broadcast pings, ARP cache queries, and routing table queries). The ability to identify devices
(a.k.a. nodes) with multiple IP interfaces is particularly important, because it is the number of managed
nodes that is limited based on the license, not the number of interfaces. For example, a router may have
several interfaces, each with its own IP address. If the ZoneRanger discovery process is able to
determine that these IP addresses are associated with a single device, that device will count as a single
node towards the license limit.
Nodes can automatically be designated as managed during the discovery process, or can be managed or
unmanaged manually using the ZoneRanger web interface. If the Auto manage newly discovered
nodes discovery option is enabled, newly discovered nodes are automatically designated as managed
when discovery runs, until the license limit is reached. After the license limit is reached, any additional
newly discovered nodes are designated as unmanaged. After discovery runs, you can unmanage one or
more nodes, and manage others, using the ZoneRanger web interface.
If the Auto manage newly discovered nodes discovery option is not enabled, newly discovered nodes
are designated as unmanaged, regardless of the license limit. After discovery runs, you can use the
ZoneRanger web interface to manage one or more of the discovered nodes.
The ZR-SPX model has no license limit with respect to proxy and forwarding services. That is, a ZR-
SPX will proxy traffic to/from any device, regardless of whether or not that device has been designated
as managed or even exists in the database. Note that autonomous management features (e.g. ZoneRanger
polling, root cause) remain limited to managed nodes, even for the ZR-SPX model, and that the ZR-SPX
has a limit of 50 managed nodes.
The ZR-SPX model is engineered based on traffic capacity, rather than node limits. As such, customers
are encouraged to consult with Tavve Sales in order to determine the number of ZR-SPX units that
would be required for any given application/deployment.
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