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7. A PCI-Compliant Data Center > Configurations
Configurations
The deployment had seven physical devices, yet only three configurations (the four EX4200s are controlled by a single configuration, and there was one configuration for the two SRXs). Only the relevant portions of each of those configurations are discussed here. As stated previously, presenting the actual configurations used in the engagement would reveal too much information about the client and its network, so in their place are generic configurations that perform the same functions. Warriors obey the confidentiality requests of their clients.
Starting at the bottom of the topology, the EX4200s are stacked and configured as a single device. The stacking (creation of the virtual chassis) can be performed in one of two ways. The first option is to use the default settings of the switches, interconnect them, and let them figure out which is the boss, which is the backup, and which are the line cards. The second method is called prepositioning and requires the stack details to be configured. For our system, we wanted the best reliability and the most predictability, so the prepositioning method was used. The configuration required the entry of the serial numbers of the EXs and the identification of the active master, the backup, and the line cards. It looked like this:
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