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Example: ingress label filtering with ldp

r1: 

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hostname r1
buggy
!
logging file debug ../binTmp/zzz64r1-log.run
!
access-list test4
 sequence 10 deny 1 any all any all
 sequence 20 permit all any all any all
 exit
!
access-list test6
 sequence 10 deny all 4321:: ffff:: all 4321:: ffff:: all
 sequence 20 permit all any all any all
 exit
!
prefix-list p4
 sequence 10 deny 2.2.2.3/32 ge 32 le 32
 sequence 20 permit 0.0.0.0/0 ge 0 le 32
 exit
!
prefix-list p6
 sequence 10 deny 4321::3/128 ge 128 le 128
 sequence 20 permit ::/0 ge 0 le 128
 exit
!
vrf definition tester
 exit
!
vrf definition v1
 rd 1:1
 label-mode per-prefix
 exit
!
interface loopback0
 no description
 vrf forwarding v1
 ipv4 address 2.2.2.1 255.255.255.255
 ipv6 address 4321::1 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff
 no shutdown
 no log-link-change
 exit
!
interface ethernet1
 no description
 vrf forwarding v1
 ipv4 address 1.1.1.1 255.255.255.0
 no ipv4 unreachables
 ipv4 access-group-in test4
 ipv6 address 1234::1 ffff::
 no ipv6 unreachables
 ipv6 access-group-in test6
 mpls enable
 mpls ldp4
 mpls ldp6
 mpls label4in p4
 mpls label6in p6
 no shutdown
 no log-link-change
 exit
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
ipv4 route v1 2.2.2.2 255.255.255.255 1.1.1.2
ipv4 route v1 2.2.2.3 255.255.255.255 1.1.1.2
ipv4 route v1 2.2.2.4 255.255.255.255 1.1.1.2
!
ipv6 route v1 4321::2 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff 1234::2
ipv6 route v1 4321::3 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff 1234::2
ipv6 route v1 4321::4 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff 1234::2
!
!
!
!
!
!
!
!
!
!
!
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/zzz64r2-log.run
!
access-list test4
 sequence 10 deny 1 any all any all
 sequence 20 permit all any all any all
 exit
!
access-list test6
 sequence 10 deny all 4321:: ffff:: all 4321:: ffff:: all
 sequence 20 permit all any all any all
 exit
!
vrf definition tester
 exit
!
vrf definition v1
 rd 1:1
 label-mode per-prefix
 exit
!
interface loopback0
 no description
 vrf forwarding v1
 ipv4 address 2.2.2.2 255.255.255.255
 ipv6 address 4321::2 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff
 no shutdown
 no log-link-change
 exit
!
interface loopback1
 no description
 vrf forwarding v1
 ipv4 address 2.2.2.3 255.255.255.255
 ipv6 address 4321::3 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff
 no shutdown
 no log-link-change
 exit
!
interface loopback2
 no description
 vrf forwarding v1
 ipv4 address 2.2.2.4 255.255.255.255
 ipv6 address 4321::4 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff
 no shutdown
 no log-link-change
 exit
!
interface ethernet1
 no description
 vrf forwarding v1
 ipv4 address 1.1.1.2 255.255.255.0
 no ipv4 unreachables
 ipv4 access-group-in test4
 ipv6 address 1234::2 ffff::
 no ipv6 unreachables
 ipv6 access-group-in test6
 mpls enable
 mpls ldp4
 mpls ldp6
 no shutdown
 no log-link-change
 exit
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
ipv4 route v1 2.2.2.1 255.255.255.255 1.1.1.1
!
ipv6 route v1 4321::1 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff 1234::1
!
!
!
!
!
!
!
!
!
!
!
server telnet tester
 security protocol telnet
 no exec authorization
 no login authentication
 vrf tester
 exit
!
!
end