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11. Internet Access Rebuild > Solution Options

Solution Options

In some engagements, the optimal solutions are obvious, and in others, the solutions are restricted by what hardware the client has on hand. In this engagement, the solution was ours to design and install, but the client wanted to review different options, weigh the pros and cons of each, and make an educated decision.

We always aim to support the client, so our little tribe created three variations on a theme that all met the client’s requirements, with slightly different hardware. The options can be differentiated by the number of layers in the design: we proposed a three-layer, a two-layer, and a one-layer design.

Three-Layer Design

The three-layer design used the most hardware, but adhered to the “not all in one basket” survivability rules. The design used an MX as an IBR, an SRX as a screening device, and an EX4200 virtual chassis as an access switch. The design is shown in Figure 11-2.


  

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