Hi Sampath, This has to do with redistributing ospf into bgp. Read the following doc for a more complete explaination.
http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a00800943c5.shtml If you configure the redistribution of OSPF into BGP without keywords, only OSPF intra-area and inter-area routes are redistributed into BGP, by default. You can use the internal keyword along with the redistribute command under router bgp to redistribute OSPF intra- and inter-area routes. Use the external keyword along with the redistribute command under router bgp to redistribute OSPF external routes into BGP. With the external keyword, you have three choices: * redistribute both external type-1 and type-2 (Default) * redistribute type-1 * redistribute type-2 Thanks. Wilson F. Tuma ==================================== CCNP, CCNA, MCSE, MCSA Box 1784 Douala Cell : +237 77 753 753 Email : [email protected] ==================================== ________________________________ From: Sampath Weerasinghe <[email protected]> To: [email protected] Sent: Monday, April 2, 2012 8:36 PM Subject: [OSL | CCIE_RS] match internal external 1 external 2 router bgp 100 redistribute ospf 1 match internal external 1 external 2 Hi, I have a question regarding redistribution of ospf in to other protocols. Looking at various workbooks, I see "match internal external 1 external 2" being used in some answers and sometimes it's not used. In what situation do we use this and when is it not required? -Sam _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com http://onlinestudylist.com/mailman/listinfo/ccie_rs _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com http://onlinestudylist.com/mailman/listinfo/ccie_rs
