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Dell EMC Configuration Guide for the S3100 Series 9.14.2.4

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Configure a Route Map for Route Redistribution

Route maps on their own cannot affect traffic and must be included in different commands to affect routing traffic.

Route redistribution occurs when Dell EMC Networking OS learns the advertising routes from static or directly connected routes or another routing protocol. Different protocols assign different values to redistributed routes to identify either the routes and their origins. The metric value is the most common attribute that is changed to properly redistribute other routes into a routing protocol. Other attributes that can be changed include the metric type (for example, external and internal route types in OSPF) and route tag. Use the redistribute command in OSPF, RIP, ISIS, and BGP to set some of these attributes for routes that are redistributed into those protocols.

Route maps add to that redistribution capability by allowing you to match specific routes and set or change more attributes when redistributing those routes.

In the following example, the redistribute command calls the route map static ospf to redistribute only certain static routes into OSPF. According to the route map static ospf, only routes that have a next hop of interface 1/1 and that have a metric of 255 are redistributed into the OSPF backbone area.

NOTE When re-distributing routes using route-maps, you must create the route-map defined in the redistribute command under the routing protocol. If you do not create a route-map, NO routes are redistributed.

Example of Calling a Route Map to Redistribute Specified Routes

router ospf 34
  default-information originate metric-type 1
  redistribute static metric 20 metric-type 2 tag 0 route-map staticospf
!
route-map staticospf permit 10
  match interface GigabitEthernet 1/1
  match metric 255
  set level backbone

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