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Example: nsh ip

r1: 

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hostname r1
buggy
!
logging file debug ../binTmp/zzz30r1-log.run
!
access-list test4
 sequence 10 permit all 1.1.1.1 255.255.255.255 all any all
 exit
!
access-list test6
 sequence 10 permit all 1111::1 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff all any all
 exit
!
vrf definition tester
 exit
!
vrf definition v1
 rd 1:1
 exit
!
interface loopback1
 no description
 vrf forwarding v1
 ipv4 address 1.1.1.1 255.255.255.0
 ipv6 address 1111::1 ffff:ffff::
 no shutdown
 no log-link-change
 exit
!
interface ethernet1
 no description
 nsh enable
 no shutdown
 no log-link-change
 exit
!
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ipv4 pbr v1 sequence 10 test4 v1 nsh 2 255
!
ipv6 pbr v1 sequence 10 test6 v1 nsh 2 255
!
!
!
!
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nsh 2 255 interface ethernet1 0000.1111.2222
!
nsh 3 253 route v1
!
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/zzz30r2-log.run
!
vrf definition tester
 exit
!
interface ethernet1
 no description
 nsh enable
 no shutdown
 no log-link-change
 exit
!
interface ethernet2
 no description
 nsh enable
 no shutdown
 no log-link-change
 exit
!
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nsh 2 254 interface ethernet2 0000.1111.2222
!
nsh 3 254 interface ethernet1 0000.1111.2222
!
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/zzz30r3-log.run
!
access-list test4
 sequence 10 permit all 1.1.1.2 255.255.255.255 all any all
 exit
!
access-list test6
 sequence 10 permit all 1111::2 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff all any all
 exit
!
vrf definition tester
 exit
!
vrf definition v1
 rd 1:1
 exit
!
interface loopback1
 no description
 vrf forwarding v1
 ipv4 address 1.1.1.2 255.255.255.0
 ipv6 address 1111::2 ffff:ffff::
 no shutdown
 no log-link-change
 exit
!
interface ethernet1
 no description
 nsh enable
 no shutdown
 no log-link-change
 exit
!
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ipv4 pbr v1 sequence 10 test4 v1 nsh 3 255
!
ipv6 pbr v1 sequence 10 test6 v1 nsh 3 255
!
!
!
!
!
nsh 2 253 route v1
!
nsh 3 255 interface ethernet1 0000.1111.2222
!
server telnet tester
 security protocol telnet
 no exec authorization
 no login authentication
 vrf tester
 exit
!
!
end