CCNP Enterprise Design ENSLD 300-420 Official Cert Guide: Designing Cisco Enterprise Networks by Steve Jordan & Anthony Bruno

Author:Steve Jordan & Anthony Bruno [Steve Jordan]
Language: eng
Format: epub
Publisher: Cisco Press
Published: 2020-08-16T16:00:00+00:00

Hierarchical Network Design

As shown in Figure 6-1, a traditional hierarchical LAN design has three layers:

• Core: The core layer provides fast transport between distribution switches within the enterprise campus.

• Distribution: The distribution layer provides policy-based connectivity.

• Access: The access layer provides workgroup and user access to the network.

Figure 6-1 Hierarchical network design has three layers: core, distribution, and access

Each layer provides necessary functionality to the enterprise campus network. You do not need to implement the layers as distinct physical entities. You can implement each layer in one or more devices or as cooperating interface components sharing a common chassis. Smaller networks can “collapse” multiple layers to a single device with only an implied hierarchy. Maintaining an explicit awareness of hierarchy is useful as the network grows.

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