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Example: pim over loopback

r1: 

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hostname r1
buggy
!
logging file debug ../binTmp/zzz6r1-log.run
!
vrf definition tester
 exit
!
vrf definition v1
 rd 1:1
 exit
!
interface loopback0
 no description
 vrf forwarding v1
 ipv4 address 1.1.1.101 255.255.255.255
 no shutdown
 no log-link-change
 exit
!
interface ethernet1
 no description
 vrf forwarding v1
 ipv4 address 1.1.1.1 255.255.255.252
 no shutdown
 no log-link-change
 exit
!
interface tunnel1
 no description
 tunnel vrf v1
 tunnel source loopback0
 tunnel destination 1.1.1.102
 tunnel mode pim
 vrf forwarding v1
 ipv4 address 2.2.2.1 255.255.255.0
 ipv6 address 4321::1 ffff::
 no shutdown
 no log-link-change
 exit
!
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ipv4 route v1 1.1.1.102 255.255.255.255 1.1.1.2
!
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server telnet tester
 security protocol telnet
 no exec authorization
 no login authentication
 vrf tester
 exit
!
!
end

r2: 

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hostname r2
buggy
!
logging file debug ../binTmp/zzz6r2-log.run
!
vrf definition tester
 exit
!
vrf definition v1
 rd 1:1
 exit
!
interface loopback0
 no description
 vrf forwarding v1
 ipv4 address 1.1.1.102 255.255.255.255
 no shutdown
 no log-link-change
 exit
!
interface ethernet1
 no description
 vrf forwarding v1
 ipv4 address 1.1.1.2 255.255.255.252
 no shutdown
 no log-link-change
 exit
!
interface tunnel1
 no description
 tunnel vrf v1
 tunnel source loopback0
 tunnel destination 1.1.1.101
 tunnel mode pim
 vrf forwarding v1
 ipv4 address 2.2.2.2 255.255.255.0
 ipv6 address 4321::2 ffff::
 no shutdown
 no log-link-change
 exit
!
!
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ipv4 route v1 1.1.1.101 255.255.255.255 1.1.1.1
!
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!
!
server telnet tester
 security protocol telnet
 no exec authorization
 no login authentication
 vrf tester
 exit
!
!
end