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Example: mpls inspection with selective ingress drop

r1: 

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hostname r1
buggy
!
logging file debug ../binTmp/zzz2r1-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 2.2.2.1 255.255.255.255
 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::1 ffff: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 2.2.2.2 255.255.255.255 1.1.1.2
ipv4 route v1 2.2.2.3 255.255.255.255 1.1.1.2
!
ipv6 route v1 4321::2 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff 1234:1::2
ipv6 route v1 4321::3 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff 1234:1::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/zzz2r2-log.run
!
access-list test
 sequence 10 permit all any all 2.2.2.3 255.255.255.255 all
 sequence 20 permit all any all 4321::3 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff 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 ethernet1
 no description
 vrf forwarding v1
 ipv4 address 1.1.1.2 255.255.255.0
 ipv6 address 1234:1::2 ffff:ffff::
 mpls enable
 mpls inspect mac drop-rx allow-list test
 mpls ldp4
 mpls ldp6
 no shutdown
 no log-link-change
 exit
!
interface ethernet2
 no description
 vrf forwarding v1
 ipv4 address 1.1.2.2 255.255.255.0
 ipv6 address 1234:2::2 ffff:ffff::
 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
ipv4 route v1 2.2.2.3 255.255.255.255 1.1.2.3
!
ipv6 route v1 4321::1 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff 1234:1::1
ipv6 route v1 4321::3 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff 1234:2::3
!
!
!
!
!
!
!
!
!
!
!
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/zzz2r3-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 2.2.2.3 255.255.255.255
 ipv6 address 4321::3 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff
 no shutdown
 no log-link-change
 exit
!
interface ethernet1
 no description
 vrf forwarding v1
 ipv4 address 1.1.2.3 255.255.255.0
 no ipv4 unreachables
 ipv4 access-group-in test4
 ipv6 address 1234:2::3 ffff:ffff::
 no ipv6 unreachables
 ipv6 access-group-in test6
 mpls enable
 mpls ldp4
 mpls ldp6
 no shutdown
 no log-link-change
 exit
!
!
!
!
!
!
!
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!
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!
!
ipv4 route v1 2.2.2.1 255.255.255.255 1.1.2.2
ipv4 route v1 2.2.2.2 255.255.255.255 1.1.2.2
!
ipv6 route v1 4321::1 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff 1234:2::2
ipv6 route v1 4321::2 ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff 1234:2::2
!
!
!
!
!
!
!
!
!
!
!
server telnet tester
 security protocol telnet
 no exec authorization
 no login authentication
 vrf tester
 exit
!
!
end


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r2#
r2#
r2#show mpls insp eth1 sess
r2#show mpls insp eth1 sess
 |~~~~~|~~~~~|~~~~~|~~~~~~~~~|~~~~~~~~~~~|~~~~~~~~~|~~~~~~~~~~~|~~~~~~|~~~~|~~~~|~~~~|~~~~|~~~~~~~~~~|~~~~~~~~~~~~~~~~|~~~~~~~~~~~~~~~~|
 |                 | source              | target              |      | packet  | byte    |          | mac                             |
 | dir | prt | tos | addr    | port      | addr    | port      | url  | rx | tx | rx | tx | time     | src            | trg            |
 |-----|-----|-----|---------|-----------|---------|-----------|------|----|----|----|----|----------|----------------|----------------|
 | tx  | 1   | 0   | 2.2.2.2 | 486067442 | 2.2.2.1 | 486067442 | null | 1  | 1  | 64 | 64 | 00:00:12 | 0000.0000.1111 | 0000.0000.2222 |
 | tx  | 1   | 0   | 2.2.2.2 | 486067443 | 2.2.2.1 | 486067443 | null | 1  | 1  | 64 | 64 | 00:00:12 | 0000.0000.1111 | 0000.0000.2222 |
 | tx  | 1   | 0   | 2.2.2.2 | 486067444 | 2.2.2.1 | 486067444 | null | 1  | 1  | 64 | 64 | 00:00:12 | 0000.0000.1111 | 0000.0000.2222 |
 | tx  | 1   | 0   | 2.2.2.2 | 486067445 | 2.2.2.1 | 486067445 | null | 1  | 1  | 64 | 64 | 00:00:11 | 0000.0000.1111 | 0000.0000.2222 |
 | tx  | 1   | 0   | 2.2.2.2 | 486067446 | 2.2.2.1 | 486067446 | null | 1  | 1  | 64 | 64 | 00:00:11 | 0000.0000.1111 | 0000.0000.2222 |
 | tx  | 1   | 0   | 2.2.2.2 | 486067447 | 2.2.2.1 | 486067447 | null | 1  | 1  | 64 | 64 | 00:00:11 | 0000.0000.1111 | 0000.0000.2222 |
 | tx  | 1   | 0   | 2.2.2.2 | 486067448 | 2.2.2.1 | 486067448 | null | 1  | 1  | 64 | 64 | 00:00:11 | 0000.0000.1111 | 0000.0000.2222 |
 | tx  | 1   | 0   | 2.2.2.2 | 486067449 | 2.2.2.1 | 486067449 | null | 1  | 1  | 64 | 64 | 00:00:11 | 0000.0000.1111 | 0000.0000.2222 |
 | tx  | 1   | 0   | 2.2.2.3 | 801142584 | 2.2.2.1 | 801142584 | null | 1  | 1  | 64 | 64 | 00:00:00 | 0000.0000.1111 | 0000.0000.2222 |
 | tx  | 1   | 0   | 2.2.2.3 | 801142585 | 2.2.2.1 | 801142585 | null | 1  | 1  | 64 | 64 | 00:00:00 | 0000.0000.1111 | 0000.0000.2222 |
 | tx  | 1   | 0   | 2.2.2.3 | 801142586 | 2.2.2.1 | 801142586 | null | 1  | 1  | 64 | 64 | 00:00:00 | 0000.0000.1111 | 0000.0000.2222 |
 | tx  | 1   | 0   | 2.2.2.3 | 801142587 | 2.2.2.1 | 801142587 | null | 1  | 1  | 64 | 64 | 00:00:00 | 0000.0000.1111 | 0000.0000.2222 |
 | tx  | 1   | 0   | 2.2.2.3 | 801142588 | 2.2.2.1 | 801142588 | null | 1  | 1  | 64 | 64 | 00:00:00 | 0000.0000.1111 | 0000.0000.2222 |
 | rx  | 1   | 0   | 2.2.2.1 | 872031803 | 2.2.2.3 | 872031803 | null | 1  | 1  | 64 | 64 | 00:00:00 | 0000.0000.2222 | 0000.0000.1111 |
 | rx  | 1   | 0   | 2.2.2.1 | 872031804 | 2.2.2.3 | 872031804 | null | 1  | 1  | 64 | 64 | 00:00:00 | 0000.0000.2222 | 0000.0000.1111 |
 | rx  | 1   | 0   | 2.2.2.1 | 872031805 | 2.2.2.3 | 872031805 | null | 1  | 1  | 64 | 64 | 00:00:00 | 0000.0000.2222 | 0000.0000.1111 |
 | rx  | 1   | 0   | 2.2.2.1 | 872031806 | 2.2.2.3 | 872031806 | null | 1  | 1  | 64 | 64 | 00:00:00 | 0000.0000.2222 | 0000.0000.1111 |
 | rx  | 1   | 0   | 2.2.2.1 | 872031807 | 2.2.2.3 | 872031807 | null | 1  | 1  | 64 | 64 | 00:00:00 | 0000.0000.2222 | 0000.0000.1111 |
 | tx  | 58  | 0   | 4321::2 | 634111588 | 4321::1 | 634111588 | null | 1  | 1  | 64 | 64 | 00:00:11 | 0000.0000.1111 | 0000.0000.2222 |
 | tx  | 58  | 0   | 4321::2 | 634111589 | 4321::1 | 634111589 | null | 1  | 1  | 64 | 64 | 00:00:11 | 0000.0000.1111 | 0000.0000.2222 |
 | tx  | 58  | 0   | 4321::2 | 634111590 | 4321::1 | 634111590 | null | 1  | 1  | 64 | 64 | 00:00:11 | 0000.0000.1111 | 0000.0000.2222 |
 | tx  | 58  | 0   | 4321::2 | 634111591 | 4321::1 | 634111591 | null | 1  | 1  | 64 | 64 | 00:00:11 | 0000.0000.1111 | 0000.0000.2222 |
 | tx  | 58  | 0   | 4321::2 | 634111592 | 4321::1 | 634111592 | null | 1  | 1  | 64 | 64 | 00:00:11 | 0000.0000.1111 | 0000.0000.2222 |
 | rx  | 58  | 0   | 4321::1 | 901309658 | 4321::3 | 901309658 | null | 1  | 1  | 64 | 64 | 00:00:00 | 0000.0000.2222 | 0000.0000.1111 |
 | rx  | 58  | 0   | 4321::1 | 901309659 | 4321::3 | 901309659 | null | 1  | 1  | 64 | 64 | 00:00:00 | 0000.0000.2222 | 0000.0000.1111 |
 | rx  | 58  | 0   | 4321::1 | 901309660 | 4321::3 | 901309660 | null | 1  | 1  | 64 | 64 | 00:00:00 | 0000.0000.2222 | 0000.0000.1111 |
 | rx  | 58  | 0   | 4321::1 | 901309661 | 4321::3 | 901309661 | null | 1  | 1  | 64 | 64 | 00:00:00 | 0000.0000.2222 | 0000.0000.1111 |
 | rx  | 58  | 0   | 4321::1 | 901309662 | 4321::3 | 901309662 | null | 1  | 1  | 64 | 64 | 00:00:00 | 0000.0000.2222 | 0000.0000.1111 |
 | tx  | 58  | 0   | 4321::3 | 934325566 | 4321::1 | 934325566 | null | 1  | 1  | 64 | 64 | 00:00:00 | 0000.0000.1111 | 0000.0000.2222 |
 | tx  | 58  | 0   | 4321::3 | 934325567 | 4321::1 | 934325567 | null | 1  | 1  | 64 | 64 | 00:00:00 | 0000.0000.1111 | 0000.0000.2222 |
 | tx  | 58  | 0   | 4321::3 | 934325568 | 4321::1 | 934325568 | null | 1  | 1  | 64 | 64 | 00:00:00 | 0000.0000.1111 | 0000.0000.2222 |
 | tx  | 58  | 0   | 4321::3 | 934325569 | 4321::1 | 934325569 | null | 1  | 1  | 64 | 64 | 00:00:00 | 0000.0000.1111 | 0000.0000.2222 |
 | tx  | 58  | 0   | 4321::3 | 934325570 | 4321::1 | 934325570 | null | 1  | 1  | 64 | 64 | 00:00:00 | 0000.0000.1111 | 0000.0000.2222 |
 |_____|_____|_____|_________|___________|_________|___________|______|____|____|____|____|__________|________________|________________|
r2#
r2#

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r2#
r2#
r2#show mpls insp eth1 top
r2#show mpls insp eth1 top
 |~~~~~~~~~|~~~~|~~~~|~~~~~~|~~~~~~|~~~~~~~~~~|
 |         | packet  | byte        |          |
 | addr    | rx | tx | rx   | tx   | time     |
 |---------|----|----|------|------|----------|
 | 2.2.2.1 | 18 | 18 | 1152 | 1152 | 00:00:12 |
 | 2.2.2.2 | 8  | 8  | 512  | 512  | 00:00:12 |
 | 2.2.2.3 | 10 | 10 | 640  | 640  | 00:00:00 |
 | 4321::1 | 15 | 15 | 960  | 960  | 00:00:11 |
 | 4321::2 | 5  | 5  | 320  | 320  | 00:00:11 |
 | 4321::3 | 10 | 10 | 640  | 640  | 00:00:00 |
 |_________|____|____|______|______|__________|
r2#
r2#