Enterprise Composite Network Model
The newer Cisco model.the Enterprise Composite Model.is significantly
more complex and attempts to address the major shortcoming of the
Hierarchical Design Model by expanding the older version and making
specific recommendations about how and where certain network functions
should be implemented. This model is based on the principles described in
the Cisco Architecture for Voice, Video, and Integrated Data (AVVID).
The Enterprise Composite Model is broken up into three large sections:
�¡ Enterprise Campus.The portion of the design that is like the old
hiearchical model.
�¡ Enterprise Edge.The connections to the public network.
�¡ Service Provider Edge.The different public networks that are
attached.
The first section, the Enterprise Campus, looks like the old Hierarchical model
with some added details. The Enterprise Campus is shown in Figure 1-2. It
features six sections:
�¡ Campus Backbone.The center of the network, like the old �gcore�h.
�¡ Building Distribution.Intermediate devices that route from the core
to access devices.
�¡ Building Access.Connections for end systems.
�¡ Management.Command, control, and auditing features.
�¡ Edge Distribution.A distribution layer out to the WAN.
�¡ Server Farm.For Enterprise services.
The Enterprise Edge (shown in Figure 1-3) details the connections from the
campus to the Wide Area Network and includes:
�¡ E-Commerce.Externally accessible services that have ties to internal
data stores.
�¡ Internet Connectivity.Connectivity to outside services.
�¡ Remote Access.Dial and VPN.
�¡ WAN.Internal links.