Multi-Protocol Routing redistribution

Migration of routing protocols

FLSM to vlsm fixed-length masks to variable-length subnet masks

Route redistribution: Allow two different protocols to learn from each other to route.

Using the seed metrics

The metric values for various routing protocols are different, so use the seed metric value to fix the seed metric value.

The default seed metrics

Infinity Infinity

Any protocol redistribution into RIP, metric values are infinitely large

Any protocol redistribution into the Eigrp,seed metric is also infinitely large, the following must be added parameters, BW, dly, loading, MTU, etc., must define the above parameters,

Any protocol redistribution into OSPF, seed metric are 20,e2 types. BGP redistribution into Ospf,seed metric is 1.

Any protocol redistribution into Isis,seed metric is 0.

Any protocol redistribution into Bgp,seed metric is the metric value that the original IGP carried.

Experiment

R2------------R1----------R3

1, the OSPF redistribution into the RIP

Router RIP

Redistribute OSPF 110 without any parameters, the default seed metric is infinite so R2 learn not to route, you should add parameters metric 1

Use Default-metric can also be modified.

The form of redistribution

A protocol redistribution into B protocol

Static redistribution into B protocol

Connect full cloth into B protocol

Redistribution Static:

Redistribute Staic, the redistribution of static routes to rip, followed by the addition of parameters, default is 1.

Re-distribution Direct connection

Redistribute connected all local direct connection Koko are distributed into the RIP, no parameters are required, and the default metric value is 1.

Re-distribute RIP into OSPF

Router OSPF 110

Redistribute RIP subnets redistribution subnet, now very few have network, in general, this command will knock

Redistribute RIP subnets metric Metric-type 1 modifies metic values and Metric-type types.

The redistribute static Subnets link state routing protocol does not decentralize the default route by redistribution, only to static routes.