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Hardware Selection
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The Cisco 4500 and 4700 series router models are being eclipsed by the 3600; however, they
are still viable products.
The 4500 and 4700 series provide a modular design similar to the 3600 and are intended for
large regional offices and central office facilities that require a high rate of throughput.
Figure 2-9 illustrates the Cisco 4xxx series router.
Figure 2-9
Cisco 4xxx Series Router
The Cisco AS5000 series routers (specifically, the 5200 and 5300 routers) provide a high port
density and are typically found at an Internet service provider's (ISP) Point-of-Presence (POP).
The AS5000 chassis incorporates the functions of modems, switches, routers, and channel
banks into a single platform. In addition, the AS5000 series can support serial, digital, ISDN,
and asynchronous access through a single physical interface. This support of mixed media
makes this router very useful for a central office environment in which many different branch
offices and ROs must be supported.
Figure 2-10 illustrates a Cisco AS5300 series router.