© 2006 Cisco Systems, Inc. All rights reserved. BSCI v Manipulating Routing Updates Configuring and Verifying Route Redistribution

© 2006 Cisco Systems, Inc. All rights reserved. BSCI v Redistribution Supports All Protocols RtrA(config)#router rip RtrA(config-router)#redistribute ? bgp Border Gateway Protocol (BGP) connected Connected eigrp Enhanced Interior Gateway Routing Protocol (EIGRP) isis ISO IS-IS iso-igrp IGRP for OSI networks metric Metric for redistributed routes mobile Mobile routes odr On Demand stub Routes ospf Open Shortest Path First (OSPF) rip Routing Information Protocol (RIP) route-map Route map reference static Static routes

© 2006 Cisco Systems, Inc. All rights reserved. BSCI v Configuring Redistribution into RIP RtrA(config)# router rip RtrA(config-router)# redistribute ospf ? Process ID RtrA(config-router)# redistribute ospf 1 ? match Redistribution of OSPF routes metric Metric for redistributed routes route-map Route map reference … Default metric is infinity.

© 2006 Cisco Systems, Inc. All rights reserved. BSCI v Redistributing into RIP

© 2006 Cisco Systems, Inc. All rights reserved. BSCI v Configuring Redistribution into OSPF Default metric is 20. Default metric type is 2. Subnets do not redistribute by default. RtrA(config)# router ospf 1 RtrA(config-router)# redistribute eigrp ? Autonomous system number RtrA(config-router)# redistribute eigrp 100 ? metric Metric for redistributed routes metric-type OSPF/IS-IS exterior metric type for redistributed routes route-map Route map reference subnets Consider subnets for redistribution into OSPF tag Set tag for routes redistributed into OSPF …

© 2006 Cisco Systems, Inc. All rights reserved. BSCI v Redistributing into OSPF

© 2006 Cisco Systems, Inc. All rights reserved. BSCI v Configuring Redistribution into EIGRP RtrA(config)# router eigrp 100 RtrA(config-router)# redistribute ospf ? Process ID RtrA(config-router)# redistribute ospf 1 ? match Redistribution of OSPF routes metric Metric for redistributed routes route-map Route map reference … Default metric is infinity.

© 2006 Cisco Systems, Inc. All rights reserved. BSCI v Bandwidth in kilobytes = Delay in tens of microseconds = 100 Reliability = 255 (maximum) Load = 1 (minimum) MTU = 1500 bytes Redistributing into EIGRP

© 2006 Cisco Systems, Inc. All rights reserved. BSCI v Configuring Redistribution into IS-IS RtrA(config)# router isis RtrA(config-router)# redistribute eigrp 100 ? level-1 IS-IS level-1 routes only level-1-2 IS-IS level-1 and level-2 routes level-2 IS-IS level-2 routes only metric Metric for redistributed routes metric-type OSPF/IS-IS exterior metric type for redistributed routes route-map Route map reference.. Output Omitted Routes are introduced as Level 2 with a metric of 0 by default.

© 2006 Cisco Systems, Inc. All rights reserved. BSCI v Redistributing into IS-IS

© 2006 Cisco Systems, Inc. All rights reserved. BSCI v Example: Before Redistribution

© 2006 Cisco Systems, Inc. All rights reserved. BSCI v Example: Before Redistribution (Cont.)

© 2006 Cisco Systems, Inc. All rights reserved. BSCI v Example: Configuring Redistribution at Router B

© 2006 Cisco Systems, Inc. All rights reserved. BSCI v Example: Routing Tables After Route Redistribution

© 2006 Cisco Systems, Inc. All rights reserved. BSCI v Example: Routing Tables After Summarizing Routes and Redistributions

© 2006 Cisco Systems, Inc. All rights reserved. BSCI v Summary Several steps must be followed for accurate IP route redistribution to occur. All IP routing protocols can be redistributed into RIP. When IP routing protocols are redistributed into OSPF, additional commands are required. When IP routing protocols are redistributed into EIGRP, a seed metric is required. IP routing protocols are usually redistributed into IS-IS as Level 2 routes. There are several techniques for verifying IP route redistribution.

© 2006 Cisco Systems, Inc. All rights reserved. BSCI v