Some of the bene?¬?ts of hierarchical addressing include the following:
?– Ease of management and troubleshooting: A hierarchical addressing scheme groups
network addresses contiguously. Because a hierarchical IP addressing scheme makes
problem components easier to locate, network management and troubleshooting are
more ef?¬?cient.
VLAN = Broadcast Domain = Logical Network (Subnet)
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Implementing VLANs and Trunks 17
?– Fewer errors: Orderly network address assignment can minimize errors and duplicate
address assignments.
?– Reduced routing table entries: In a hierarchical addressing plan, routing protocols
are able to perform route summarization, allowing a single routing table entry to
represent a collection of IP network numbers. Route summarization makes routing
table entries more manageable and provides these bene?¬?ts:
??” Fewer CPU cycles when recalculating a routing table or sorting through
the routing table entries to ?¬?nd a match
??” Reduced router memory requirements
??” Faster convergence after a change in the network
??” Easier troubleshooting
Applying IP Address Space in the Enterprise Network
The Cisco Enterprise Architecture model provides a modular framework for designing and
deploying networks.
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