Hello, by default EIGRP puts up to 4 equal cost paths in the routing table, which then the router(s) load balances on those routes. You have three paths here of equal routes if they are the same B/W.
EIGRP LoadBalancing
http://www.cisco.com/en/US/tech/tk365/technologies_white_paper09186a0080094cb7.shtml#loadbalancing
Unequal cost LoadBalancing
http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a008009437d.shtml
Route Maps
Route maps are used when redistributing routes into an OSPF, RIP, or EIGRP routing process. They are also used when generating a default route into an OSPF routing process. A route map defines which of the routes from the specified routing protocol are allowed to be redistributed into the target routing process.
Route maps have many features in common with widely known ACLs. These are some of the traits common to both:
•
They are an ordered sequence of individual statements, each has a permit or deny result. Evaluation of ACL or route maps consists of a list scan, in a predetermined order, and an evaluation of the criteria of each statement that matches. A list scan is aborted once the first statement match is found and an action associated with the statement match is performed.
•They are generic mechanisms—Criteria matches and match interpretation are dictated by the way that they are applied. The same route map applied to different tasks might be interpreted differently.
These are some of the differences between route maps and ACLs:
•Route maps frequently use ACLs as matching criteria.
•The main result from the evaluation of an access list is a yes or no answer—An ACL either permits or denies input data. Applied to redistribution, an ACL determines if a particular route can (route matches ACLs permit statement) or can not (matches deny statement) be redistributed. Typical route maps not only permit (some) redistributed routes but also modify information associated with the route, when it is redistributed into another protocol.
•Route maps are more flexible than ACLs and can verify routes based on criteria which ACLs can not verify. For example, a route map can verify if the type of route is internal.
•Each ACL ends with an implicit deny statement, by design convention; there is no similar convention for route maps. If the end of a route map is reached during matching attempts, the result depends on the specific application of the route map. Fortunately, route maps that are applied to redistribution behave the same way as ACLs: if the route does not match any clause in a route map then the route redistribution is denied, as if the route map contained deny statement at the end.
Route-Maps
http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a008047915d.shtml#what
Hope this helps
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