Cannot Update Source Loopback For BGP

[hfakoor222]

Trying to switch my source from

R12's F0/0 interface to its L0 interface

interface FastEthernet0/0
ip address 10.1.3.12 255.255.255.0
duplex auto
speed auto




interface Loopback0
ip address 12.1.1.1 255.255.255.224

exit

router bgp 1000
bgp log-neighbor-changes
neighbor 10.1.3.1 remote-as 1000
neighbor 10.1.4.11 remote-as 1000
!
address-family ipv4
neighbor 10.1.3.1 activate
neighbor 10.1.4.11 activate
no auto-summary
no synchronization
exit-address-family

whenever I try to update source of neighbor**bleep** I get error

R1(config-router)#neighbor 10.1.3.12 update-source loopback 0







R1(config-router)#neighbor 10.1.3.12 update-source lOOPBCK ?
% Unrecognized command
R1(config-router)#neighbor 10.1.3.12 update-source Loopback ?
<0-2147483647> Loopback interface number

R1(config-router)#neighbor 10.1.3.12 update-source Loopback 0
                                                                                                   ^
% Invalid input detected at '^' marker.

R1(config-router)#neighbor 10.1.3.12 update-source Loopback 0
                                                                                                   ^
% Invalid input detected at '^' marker.

R1(config-router)#neighbor 10.1.3.12 update-source Loopback1

                                                                                                  ^




% Invalid input detected at '^' marker.

R1(config-router)#neighbor 12.1.1.1 remote-as 1000
R1(config-router)#neighbor 12.1.1.1 activate
R1(config-router)#neighbor 12.1.1.1 update-source 12.1.1.1

Any suggestions? This is the second lab I've tried to update the source to L) and yet same error

[Jon Marshall · Accepted solution]

The loopback interface is on R12 so why are you trying to run that command on R1 ? 

R12 




neighbor <R1 IP> update source loopback0 




R1 




ip route 12.1.1.1 255.255.255.255 10.3.1.12

Jon

[MHM Cisco World]

Update source  must not config under ipv4 address family.

Also typo loopback not loopbck 

Config neighbor remote as and update loopback under bgp,

Under address family ipv4 only activate this neighbor.