I am struggling with BGP backdoor. I seem to get the more complicated aspects of BGP, but this backdoor command is really getting me down. I test on Friday and would appreciate any help. In the configs below, BILBO and GLORI have EBGP connections to ELROND. BILBO and GLORI have a ISIS connection between each other. ISIS is actually running on all the routers as an IGP. All the routers know about the network 3.0.0.0 from ISIS. GLORI injects 3.0.0.0 into BGP using the network command and the update is sent across the EBGP connection to ELROND, who in turn passes the update across his EBGP connection to BILBO. BILBO has the "network 3.0.0.0 backdoor" added to his configuration, but the BGP route still appears in the routing table instead of the ISIS route. I have omitted a lot of the config files because they are huge and harsh to read through, but I tried to include all relevant text. I have tried this so many ways and times that I am beginning to have doubts about myself since such a seemingly simple task is stumping me. Please help!!
hostname Bilbo interface Serial0/0 no ip address encapsulation frame-relay ! interface Serial0/0.1 multipoint ip address 150.150.10.1 255.255.255.0 ip router isis ip ospf network point-to-multipoint ! interface Serial0/0.2 point-to-point ip address 150.150.20.1 255.255.255.0 ip router isis ipx network 200 ipx nlsp a1 enable frame-relay interface-dlci 940 ! router bgp 100 network 3.0.0.0 backdoor neighbor 150.150.20.2 remote-as 200 Bilbo#b BGP table version is 2, local router ID is 200.200.9.1 Status codes: s suppressed, d damped, h history, * valid, > best, i - internal Origin codes: i - IGP, e - EGP, ? - incomplete Network Next Hop Metric LocPrf Weight Path *> 3.0.0.0 150.150.20.2 0 200 300 i Bilbo#i i L2 1.0.0.0/8 [115/20] via 150.150.20.2, Serial0/0.2 C 2.0.0.0/8 is directly connected, Virtual-TokenRing2 B 3.0.0.0/8 [20/0] via 150.150.20.2, 00:26:45 i L2 4.0.0.0/8 [115/20] via 150.150.10.2, Serial0/0.1 O E1 5.0.0.0/8 [110/128] via 150.150.10.3, 00:29:29, Serial0/0.1 O E1 200.200.220.0/24 [110/128] via 150.150.10.3, 00:29:29, Serial0/0.1 hostname Elrond interface Serial0/0.1 point-to-point ip address 150.150.20.2 255.255.255.0 no ip directed-broadcast ip router isis ipx network 200 interface Serial0/0.3 point-to-point ip address 150.150.21.1 255.255.255.0 no ip directed-broadcast ip router isis ipx network 21 router bgp 200 network 3.0.0.0 backdoor neighbor 150.150.20.1 remote-as 100 neighbor 150.150.21.2 remote-as 300 Elrond#b BGP table version is 2, local router ID is 200.200.240.1 Status codes: s suppressed, d damped, h history, * valid, > best, i - internal Origin codes: i - IGP, e - EGP, ? - incomplete Network Next Hop Metric LocPrf Weight Path *> 3.0.0.0 150.150.21.2 0 0 300 i hostname GLORI interface Serial0/0 ip address 150.150.10.2 255.255.255.0 no ip directed-broadcast ip router isis encapsulation frame-relay interface Serial0/0.2 point-to-point ip address 150.150.21.2 255.255.255.0 no ip directed-broadcast ip router isis ipx network 21 router bgp 300 network 3.0.0.0 neighbor 150.150.21.1 remote-as 200 GLORI#b BGP table version is 2, local router ID is 200.200.230.1 Status codes: s suppressed, d damped, h history, * valid, > best, i - internal Origin codes: i - IGP, e - EGP, ? - incomplete Network Next Hop Metric LocPrf Weight Path *> 3.0.0.0 0.0.0.0 0 32768 i GLORI#i i L2 1.0.0.0/8 [115/30] via 150.150.10.1, Serial0/0 C 3.0.0.0/8 is directly connected, Virtual-TokenRing3 C 4.0.0.0/8 is directly connected, Virtual-TokenRing4 i L2 5.0.0.0/8 [115/84] via 150.150.10.1, Serial0/0 i L2 200.200.220.0/24 [115/84] via 150.150.10.1, Serial0/0 i L2 6.0.0.0/8 [115/84] via 150.150.10.1, Serial0/0 i L2 200.200.241.0/24 [115/84] via 150.150.10.1, Serial0/0 Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=33421&t=33421 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
