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Example: interface inspection with ingress drop

r1: 

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hostname r1
buggy
!
logging file debug ../binTmp/zzz56r1-log.run
!
vrf definition tester
 exit
!
vrf definition v1
 rd 1:1
 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
 ipv6 address 1234:1::1 ffff:ffff::
 ipv6 host-static 1234:1::2 0000.0000.2222
 no shutdown
 no log-link-change
 exit
!
!
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!
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
!
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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/zzz56r2-log.run
!
vrf definition tester
 exit
!
vrf definition v1
 rd 1:1
 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
 ipv4 inspect mac drop-rx
 ipv6 address 1234:1::2 ffff:ffff::
 ipv6 inspect mac drop-rx
 ipv6 host-static 1234:1::1 0000.0000.1111
 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::
 no shutdown
 no log-link-change
 exit
!
!
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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
!
!
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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/zzz56r3-log.run
!
vrf definition tester
 exit
!
vrf definition v1
 rd 1:1
 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
 ipv6 address 1234:2::3 ffff:ffff::
 no shutdown
 no log-link-change
 exit
!
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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
!
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!
server telnet tester
 security protocol telnet
 no exec authorization
 no login authentication
 vrf tester
 exit
!
!
end


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r2#
r2#
r2#show ipv4 insp eth1
r2#show ipv4 insp eth1
 |~~~~~|~~~~~|~~~~~|~~~~~~~~~|~~~~~~~~~~~|~~~~~~~~~|~~~~~~~~~~~|~~~~~~|~~~~|~~~~|~~~~|~~~~|~~~~~~~~~~|~~~~~~~~~~~~~~~~|~~~~~~~~~~~~~~~~|
 |                 | 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 | 209205309 | 2.2.2.1 | 209205309 | null | 0  | 1  | 0  | 64 | 00:00:25 | 0000.0000.0000 | 0000.0000.0000 |
 | tx  | 1   | 0   | 2.2.2.2 | 209205310 | 2.2.2.1 | 209205310 | null | 1  | 1  | 64 | 64 | 00:00:24 | 0000.0000.0000 | 0000.0000.0000 |
 | tx  | 1   | 0   | 2.2.2.2 | 209205311 | 2.2.2.1 | 209205311 | null | 1  | 1  | 64 | 64 | 00:00:24 | 0000.0000.0000 | 0000.0000.0000 |
 | tx  | 1   | 0   | 2.2.2.2 | 209205312 | 2.2.2.1 | 209205312 | null | 1  | 1  | 64 | 64 | 00:00:24 | 0000.0000.0000 | 0000.0000.0000 |
 | tx  | 1   | 0   | 2.2.2.2 | 209205313 | 2.2.2.1 | 209205313 | null | 1  | 1  | 64 | 64 | 00:00:24 | 0000.0000.0000 | 0000.0000.0000 |
 | tx  | 1   | 0   | 2.2.2.2 | 209205314 | 2.2.2.1 | 209205314 | null | 1  | 1  | 64 | 64 | 00:00:23 | 0000.0000.0000 | 0000.0000.0000 |
 | tx  | 1   | 0   | 2.2.2.2 | 209205315 | 2.2.2.1 | 209205315 | null | 1  | 1  | 64 | 64 | 00:00:23 | 0000.0000.0000 | 0000.0000.0000 |
 | tx  | 1   | 0   | 2.2.2.2 | 209205316 | 2.2.2.1 | 209205316 | null | 1  | 1  | 64 | 64 | 00:00:23 | 0000.0000.0000 | 0000.0000.0000 |
 | tx  | 1   | 0   | 2.2.2.2 | 209205317 | 2.2.2.1 | 209205317 | null | 1  | 1  | 64 | 64 | 00:00:23 | 0000.0000.0000 | 0000.0000.0000 |
 | tx  | 1   | 0   | 2.2.2.2 | 209205318 | 2.2.2.1 | 209205318 | null | 1  | 1  | 64 | 64 | 00:00:23 | 0000.0000.0000 | 0000.0000.0000 |
 | tx  | 1   | 0   | 2.2.2.3 | 771721745 | 2.2.2.1 | 771721745 | null | 1  | 1  | 64 | 64 | 00:00:00 | 0000.0000.2222 | 0000.0000.3333 |
 | tx  | 1   | 0   | 2.2.2.3 | 771721746 | 2.2.2.1 | 771721746 | null | 1  | 1  | 64 | 64 | 00:00:00 | 0000.0000.2222 | 0000.0000.3333 |
 | tx  | 1   | 0   | 2.2.2.3 | 771721747 | 2.2.2.1 | 771721747 | null | 1  | 1  | 64 | 64 | 00:00:00 | 0000.0000.2222 | 0000.0000.3333 |
 | tx  | 1   | 0   | 2.2.2.3 | 771721748 | 2.2.2.1 | 771721748 | null | 1  | 1  | 64 | 64 | 00:00:00 | 0000.0000.2222 | 0000.0000.3333 |
 | tx  | 1   | 0   | 2.2.2.3 | 771721749 | 2.2.2.1 | 771721749 | null | 1  | 1  | 64 | 64 | 00:00:00 | 0000.0000.2222 | 0000.0000.3333 |
 |_____|_____|_____|_________|___________|_________|___________|______|____|____|____|____|__________|________________|________________|
r2#
r2#

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r2#
r2#
r2#show ipv6 insp eth1
r2#show ipv6 insp eth1
 |~~~~~|~~~~~|~~~~~|~~~~~~~~~|~~~~~~~~~~~|~~~~~~~~~|~~~~~~~~~~~|~~~~~~|~~~~|~~~~|~~~~|~~~~|~~~~~~~~~~|~~~~~~~~~~~~~~~~|~~~~~~~~~~~~~~~~|
 |                 | source              | target              |      | packet  | byte    |          | mac                             |
 | dir | prt | tos | addr    | port      | addr    | port      | url  | rx | tx | rx | tx | time     | src            | trg            |
 |-----|-----|-----|---------|-----------|---------|-----------|------|----|----|----|----|----------|----------------|----------------|
 | tx  | 58  | 0   | 4321::2 | 208371861 | 4321::1 | 208371861 | null | 1  | 1  | 64 | 64 | 00:00:23 | 0000.0000.0000 | 0000.0000.0000 |
 | tx  | 58  | 0   | 4321::2 | 208371862 | 4321::1 | 208371862 | null | 1  | 1  | 64 | 64 | 00:00:23 | 0000.0000.0000 | 0000.0000.0000 |
 | tx  | 58  | 0   | 4321::2 | 208371863 | 4321::1 | 208371863 | null | 1  | 1  | 64 | 64 | 00:00:23 | 0000.0000.0000 | 0000.0000.0000 |
 | tx  | 58  | 0   | 4321::2 | 208371864 | 4321::1 | 208371864 | null | 1  | 1  | 64 | 64 | 00:00:23 | 0000.0000.0000 | 0000.0000.0000 |
 | tx  | 58  | 0   | 4321::2 | 208371865 | 4321::1 | 208371865 | null | 1  | 1  | 64 | 64 | 00:00:23 | 0000.0000.0000 | 0000.0000.0000 |
 | tx  | 58  | 0   | 4321::3 | 358854584 | 4321::1 | 358854584 | null | 1  | 1  | 64 | 64 | 00:00:00 | 0000.0000.2222 | 0000.0000.3333 |
 | tx  | 58  | 0   | 4321::3 | 358854585 | 4321::1 | 358854585 | null | 1  | 1  | 64 | 64 | 00:00:00 | 0000.0000.2222 | 0000.0000.3333 |
 | tx  | 58  | 0   | 4321::3 | 358854586 | 4321::1 | 358854586 | null | 1  | 1  | 64 | 64 | 00:00:00 | 0000.0000.2222 | 0000.0000.3333 |
 | tx  | 58  | 0   | 4321::3 | 358854587 | 4321::1 | 358854587 | null | 1  | 1  | 64 | 64 | 00:00:00 | 0000.0000.2222 | 0000.0000.3333 |
 | tx  | 58  | 0   | 4321::3 | 358854588 | 4321::1 | 358854588 | null | 1  | 1  | 64 | 64 | 00:00:00 | 0000.0000.2222 | 0000.0000.3333 |
 |_____|_____|_____|_________|___________|_________|___________|______|____|____|____|____|__________|________________|________________|
r2#
r2#

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r2#
r2#
r2#show ipv4 top eth1
r2#show ipv4 top eth1
 |~~~~~~~~~|~~~~|~~~~|~~~~~|~~~~~|~~~~~~~~~~|
 |         | packet  | byte      |          |
 | addr    | rx | tx | rx  | tx  | time     |
 |---------|----|----|-----|-----|----------|
 | 2.2.2.1 | 14 | 15 | 896 | 960 | 00:00:25 |
 | 2.2.2.2 | 9  | 10 | 576 | 640 | 00:00:25 |
 | 2.2.2.3 | 5  | 5  | 320 | 320 | 00:00:01 |
 |_________|____|____|_____|_____|__________|
r2#
r2#

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r2#
r2#
r2#show ipv6 top eth1
r2#show ipv6 top eth1
 |~~~~~~~~~|~~~~|~~~~|~~~~~|~~~~~|~~~~~~~~~~|
 |         | packet  | byte      |          |
 | addr    | rx | tx | rx  | tx  | time     |
 |---------|----|----|-----|-----|----------|
 | 4321::1 | 10 | 10 | 640 | 640 | 00:00:23 |
 | 4321::2 | 5  | 5  | 320 | 320 | 00:00:23 |
 | 4321::3 | 5  | 5  | 320 | 320 | 00:00:01 |
 |_________|____|____|_____|_____|__________|
r2#
r2#