You’re feeling pretty confident in your understanding of Cisco’s Enhanced Interior Gateway Routing Protocol (EIGRP), but then somebody mentions something called EIGRP named mode configuration, or possibly even Named EIGRP, and suddenly you’re all like …..?!? CCNP candidate is required to have at least a passing knowledge of EIGRP named mode and how it differs from classic EIGRP. Classic EIGRP, which is also referred to as EIGRP Autonomous System (AS) mode , is how most people think of EIGRP. A simple classic EIGRP configuration begins with he ever-familiar router eigrp autonomous-system command, where autonomous-system is a value between 1 and 65535. You can use the context-sensitive help functionality in IOS to confirm the command syntax as shown below: R12.4(config)# router eigrp ? <1-65535> Autonomous system number The output in the previous example is from a router running IOS 12.4. As you can see, this particular version of IOS supports EI