Net Insight Nimbra One User Manual page 88

86 • DTM Configuration
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Figure 83. Dynamic routing
Enter the values and click OK.
In the default configuration, DRP will make sure that all nodes in the network
contains a host route for each other node in the network. In a large network, it is
sometimes desirable to lower the number of routing entries in a node. DRP
provides a number of mechanisms to do this.
For dynamic routes the type could be set to:
•
Link Prefix
If there are many end-nodes with addresses with a common prefix attached to a
single switch, then it is possible to announce all the end-nodes as a single route
instead of announcing them individually. This is done by configuring the end-
nodes as end node (in Dynamic routing config) and adding a link-prefix route in
the switch.
X.17.01 n1
n2
X.17.02
X.17.03 n3
Figure 84. Routing entries
Nodes n1, n2 and n3 are configured as end-nodes and they have DTM addresses
that all fall in the range X.17.00/60 (i.e. from X.17.00 to X.17.0F). A link-
prefix route can therefore be added to the node s1. This means that instead of
announcing n1, n2 and n3 individually, s1 will announce only X.17.00/60.
Instead of each node in the DTM network having three separate routes for n1,
n2 and n3, they will only have a single route that covers all three of them.
•
Area Prefix
A network can be divided into areas to increase the scalability of DRP. Each
area is identified with an area number, that must be configured in each node
belonging to the area. The default value of the area number is zero. A border
node is a node that has at least one neighbour that resides in another area. Two
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s1