Multicast BGP tranfers RPF intormation so that a router in distant AS XXX knows where to RPF from. The usual approach is to run multicast bgp family and redistribute connected everywhere. As minimal redistribute the networks of the source server. So when last hop router receives the feed it does show ip rpf <source> and accept the feed.
2012/3/19 Bodnar, Edward <[email protected]> > Anybody have a good example on how to fix RPF using MBGP. Not sure why > But I just can't seem to pull this off. My confusion is around what > networks I need to put into MBGP and from what point to what point do I set > MBGP up. > > > Currently what I am trying. Configuration added. I need to know what > networks I would need to add to MBGP and between what 2 routers would I > set this up. Most importantly I need to understand WHY. > > R1-----R2-------R3 > | | > | | > R5-----R4--------- > > > > R1#sh run > Building configuration... > > Current configuration : 956 bytes > ! > version 12.4 > service timestamps debug datetime msec > service timestamps log datetime msec > no service password-encryption > ! > hostname R1 > ! > boot-start-marker > boot-end-marker > ! > ! > no aaa new-model > memory-size iomem 5 > ip cef > ! > ! > ! > ! > ip multicast-routing > ! > multilink bundle-name authenticated > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > archive > log config > hidekeys > ! > ! > ! > ! > ! > ! > ! > ! > interface Loopback0 > ip address 1.1.1.1 255.255.255.0 > ip pim sparse-mode > ! > interface FastEthernet0/0 > ip address 10.10.12.1 255.255.255.0 > ip pim sparse-mode > no ip mroute-cache > speed 100 > full-duplex > ! > interface FastEthernet0/1 > no ip address > ip pim sparse-mode > no ip mroute-cache > speed 100 > full-duplex > ! > router ospf 100 > log-adjacency-changes > network 0.0.0.0 255.255.255.255 area 0 > ! > ip forward-protocol nd > ! > ! > ip http server > no ip http secure-server > ip pim rp-address 1.1.1.1 > ! > ! > ! > ! > ! > ! > ! > control-plane > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > line con 0 > line aux 0 > line vty 0 4 > ! > ! > end > > > > R2(config-router)#do sh run > Building configuration... > > Current configuration : 1534 bytes > ! > version 12.4 > service timestamps debug datetime msec > service timestamps log datetime msec > no service password-encryption > ! > hostname R2 > ! > boot-start-marker > boot-end-marker > ! > ! > no aaa new-model > memory-size iomem 5 > ip cef > ! > ! > ! > ! > ip multicast-routing > ! > multilink bundle-name authenticated > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > archive > log config > hidekeys > ! > ! > ! > ! > ! > ! > ! > ! > interface Loopback0 > ip address 2.2.2.2 255.255.255.0 > ip pim sparse-mode > ! > interface FastEthernet0/0 > ip address 10.10.12.2 255.255.255.0 > ip pim sparse-mode > no ip mroute-cache > speed 100 > full-duplex > ! > interface Serial0/0 > ip address 10.10.23.2 255.255.255.0 > ip pim sparse-mode > encapsulation ppp > clock rate 2000000 > ! > interface FastEthernet0/1 > ip address 10.10.24.2 255.255.255.0 > no ip mroute-cache > speed 100 > full-duplex > ! > interface Serial0/1 > no ip address > shutdown > clock rate 2000000 > ! > router ospf 100 > log-adjacency-changes > network 0.0.0.0 255.255.255.255 area 0 > ! > router bgp 100 > no bgp default ipv4-unicast > bgp log-neighbor-changes > neighbor 4.4.4.4 remote-as 100 > neighbor 4.4.4.4 update-source Loopback0 > ! > address-family ipv4 > no auto-summary > no synchronization > network 4.4.4.4 mask 255.255.255.255 > exit-address-family > ! > address-family ipv4 multicast > neighbor 4.4.4.4 activate > no auto-summary > no synchronization > exit-address-family > ! > ip forward-protocol nd > ! > ! > ip http server > no ip http secure-server > ip pim rp-address 1.1.1.1 > ! > ! > ! > ! > ! > ! > ! > control-plane > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > line con 0 > line aux 0 > line vty 0 4 > ! > ! > end > > R2(config-router)# > > R3#sh run > Building configuration... > > Current configuration : 1304 bytes > ! > version 12.4 > service timestamps debug datetime msec > service timestamps log datetime msec > no service password-encryption > ! > hostname R3 > ! > boot-start-marker > boot-end-marker > ! > ! > no aaa new-model > memory-size iomem 5 > ip cef > ! > ! > ! > ! > ip multicast-routing > ! > multilink bundle-name authenticated > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > archive > log config > hidekeys > ! > ! > ! > ! > ! > ! > ! > ! > interface Loopback0 > ip address 3.3.3.3 255.255.255.0 > ip pim sparse-mode > ! > interface FastEthernet0/0 > no ip address > ip pim sparse-mode > no ip mroute-cache > speed 100 > full-duplex > ! > interface Serial0/0 > ip address 10.10.23.3 255.255.255.0 > ip pim sparse-mode > encapsulation ppp > clock rate 2000000 > ! > interface FastEthernet0/1 > no ip address > ip pim sparse-mode > no ip mroute-cache > speed 100 > full-duplex > ! > interface Serial0/1 > ip address 10.10.34.3 255.255.255.0 > ip pim sparse-mode > encapsulation ppp > clock rate 2000000 > ! > interface Serial0/2 > no ip address > shutdown > clock rate 2000000 > ! > interface Serial0/3 > no ip address > shutdown > clock rate 2000000 > ! > router ospf 100 > log-adjacency-changes > network 0.0.0.0 255.255.255.255 area 0 > ! > ip forward-protocol nd > ! > ! > ip http server > no ip http secure-server > ip pim rp-address 1.1.1.1 > ! > ! > ! > ! > ! > ! > ! > control-plane > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > line con 0 > line aux 0 > line vty 0 4 > ! > ! > end > > R3# > > > R4(config-router-af)#do sh run > Building configuration... > > Current configuration : 1450 bytes > ! > version 12.4 > service timestamps debug datetime msec > service timestamps log datetime msec > no service password-encryption > ! > hostname R4 > ! > boot-start-marker > boot-end-marker > ! > ! > no aaa new-model > memory-size iomem 5 > ip cef > ! > ! > ! > ! > ip multicast-routing > ! > multilink bundle-name authenticated > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > archive > log config > hidekeys > ! > ! > ! > ! > ! > ! > ! > ! > interface Loopback0 > ip address 4.4.4.4 255.255.255.0 > ip pim sparse-mode > ! > interface FastEthernet0/0 > ip address 10.10.45.4 255.255.255.0 > ip pim sparse-mode > no ip mroute-cache > speed 100 > full-duplex > ! > interface Serial0/0 > ip address 10.10.34.4 255.255.255.0 > ip pim sparse-mode > encapsulation ppp > clock rate 2000000 > ! > interface FastEthernet0/1 > ip address 10.10.24.4 255.255.255.0 > no ip mroute-cache > speed 100 > full-duplex > ! > interface Serial0/1 > no ip address > shutdown > clock rate 2000000 > ! > router ospf 100 > log-adjacency-changes > network 0.0.0.0 255.255.255.255 area 0 > ! > router bgp 100 > no bgp default ipv4-unicast > bgp log-neighbor-changes > neighbor 2.2.2.2 remote-as 100 > neighbor 2.2.2.2 update-source Loopback0 > ! > address-family ipv4 multicast > neighbor 2.2.2.2 activate > no auto-summary > no synchronization > network 2.2.2.2 mask 255.255.255.255 > exit-address-family > ! > ip forward-protocol nd > ! > ! > ip http server > no ip http secure-server > ip pim rp-address 1.1.1.1 > ! > ! > ! > ! > ! > ! > ! > control-plane > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > line con 0 > line aux 0 > line vty 0 4 > ! > ! > end > > R4(config-router-af)# > > > R5#sh run > Building configuration... > > Current configuration : 986 bytes > ! > version 12.4 > service timestamps debug datetime msec > service timestamps log datetime msec > no service password-encryption > ! > hostname R5 > ! > boot-start-marker > boot-end-marker > ! > ! > no aaa new-model > memory-size iomem 5 > ip cef > ! > ! > ! > ! > ip multicast-routing > ! > multilink bundle-name authenticated > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > archive > log config > hidekeys > ! > ! > ! > ! > ! > ! > ! > ! > interface Loopback0 > ip address 5.5.5.5 255.255.255.0 > ip pim sparse-mode > ip igmp join-group 239.5.5.5 > ! > interface FastEthernet0/0 > ip address 10.10.45.5 255.255.255.0 > ip pim sparse-mode > no ip mroute-cache > speed 100 > full-duplex > ! > interface FastEthernet0/1 > no ip address > ip pim sparse-mode > no ip mroute-cache > speed 100 > full-duplex > ! > router ospf 100 > log-adjacency-changes > network 0.0.0.0 255.255.255.255 area 0 > ! > ip forward-protocol nd > ! > ! > ip http server > no ip http secure-server > ip pim rp-address 1.1.1.1 > ! > ! > ! > ! > ! > ! > ! > control-plane > ! > ! > ! > ! > ! > ! > ! > ! > ! > ! > line con 0 > line aux 0 > line vty 0 4 > ! > ! > end > > > > _______________________________________________ > 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
