Metrics
Protocol metrics play an important role in redistribution of routes. Each routing protocol can make use of different metrics. For example, Routing Information Protocol (RIP) uses hop count as its metric, while Interior Gateway Routing Protocol/Enhanced Interior Gateway Routing Protocol (IGRP/EIGRP) bases its metric on bandwidth and delay. Because these differences exist, when you distribute routes, you must define an artificial metric that the receiving protocol can understand and use. With Cisco IOS Software, two ways of defining metrics when redistributing routes are as follows:
You can define the metric for that specific redistribution only.
You can use the same metric as a default for all redistributions.
The supported automatic metric ...
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