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- The redistribution function is performed by one of the routers in the network. Both dynamic routing protocols must be running on the router. In the example below, the redistribution is performed by the BS2 router.
- Redistribution is a one-way process. In the example, the protocol 1 operation on router BS2 is configured to transmit routing information received by router BS2 via protocol 2.
- To make redistribution be bi-directional, it is necessary to configure both redistribution to protocol 1 and redistribution to protocol 2 on the BS2 router.
- The different dynamic routing protocols have also different distance values and metrics that must be transformed during redistribution:
- distance: the value is used assigned to the protocol to which the redistribution is performed. In this example, for the routes to networks 172.16.2.0/29 and 10.10.30.0/24 the protocol 1 distance value will be set;
- metric: each route imported into the dynamic routing protocol from external sources has a fixed metric value.During routing information distribution about networks 172.16.2.0/29 and 10.10.30.0/24 by protocol 1, BS2 will set for them a certain metric value used by protocol 1. In this case, the metric values used by protocol 2 will be ignored.
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Figure 1 - The scheme with a routing information redistribution |
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