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Example: ipv4-ipv6 protocol translation

r1:

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hostname r1
buggy
!
logging file debug ../binTmp/zzz63r1-log.run
!
vrf definition tester
 exit
!
vrf definition v1
 rd 1:1
 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
!
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ipv4 route v1 0.0.0.0 0.0.0.0 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/zzz63r2-log.run
!
vrf definition tester
 exit
!
vrf definition v1
 rd 1:1
 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 ethernet2
 no description
 vrf forwarding v1
 ipv6 address 1234::101:106 ffff:ffff:ffff:ffff:ffff:ffff:ffff:fffc
 no shutdown
 no log-link-change
 exit
!
interface tunnel1
 no description
 tunnel key 120
 tunnel vrf v1
 tunnel source ethernet2
 tunnel destination 1234::101:101
 tunnel mode 6to4
 vrf forwarding v1
 ipv4 address 1.1.1.0 255.255.255.0
 ipv6 address 1234::101:100 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ff00
 no shutdown
 no log-link-change
 exit
!
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!
server telnet tester
 security protocol telnet
 no exec authorization
 no login authentication
 vrf tester
 exit
!
!
end

r3:

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hostname r3
buggy
!
logging file debug ../binTmp/zzz63r3-log.run
!
vrf definition tester
 exit
!
vrf definition v1
 rd 1:1
 exit
!
interface ethernet1
 no description
 vrf forwarding v1
 ipv6 address 1234::101:105 ffff:ffff:ffff:ffff:ffff:ffff:ffff:fffc
 no shutdown
 no log-link-change
 exit
!
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ipv6 route v1 :: :: 1234::101:106
!
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!
!
server telnet tester
 security protocol telnet
 no exec authorization
 no login authentication
 vrf tester
 exit
!
!
end