Router 1 would have received notification of routes originating from router 3 from two different sources (router 2 and router 4) One of those notifications would have arrived prior to the other. Upon receipt of the duplicate route, BGP would discard that update. | CertificationZone Page 1 of 9 Date of Issue 09-01-2000 BGP III Lab Scenario by Chuck Larrieu Setup Working Configurations Router 1 Configuration Router 2 Configuration Router 3 Configuration Router 4 Configuration A Look at the Routing Tables Reality Check A Look at the Regular Expressions Path Manipulation on Router 4 How Could You See the Regexp Changing Policy Add the Access List to Router 4 Configuration. Huh It Didn t Work. Something Is Missing Setup Build a configuration that consists of four routers R1------R2-------R3--------R4 I I I I Router_1 Router_2 Router_3 Router_4 AS 1 2 3 4 Router ID Ethernet 0 n a n a n a n a Loopback 0 24 24 24 24 Loopback 1 24 24 24 24 Loopback 2 24 24 24 24 Loopback 3 24 24 24 24 Serial 0 30 30 30 30 Serial 1 30 30 30 30 Working Configurations Router 1 Configuration service timestamps debug uptime service timestamps log uptime no service password-encryption service udp-small-servers service tcp-small-servers hostname Routerl http studyguides. Issue 20 IssueDate 09-01-2000 CP 11 06 01 CertificationZone Page 2 of 9 ip subnet-zero cns event-service server interface LoopbackO ip address interface Loopback1 ip address interface Loopback2 ip address interface Loopback3 ip address interface EthernetO no ip address shutdown no cdp enable interface SerialO ip address interface Serial1 ip address router ospf 1000 network area 0 network area 0 network area 0 network area
