ну два VRF это тоже костыль в данном кейсе.. Других идей кроме этих решений с ходу не могу придумать.

sh policy-map interface control-plane class copp-s-arp
Control Plane

 service-policy  input: copp-system-policy

   class-map copp-s-arp (match-any)
     police pps 200
       OutPackets    1642697
       DropPackets   157567986

2021-04-13 17:30:46.349423 f0:b4:d2:80:7c:74 -> ff:ff:ff:ff:ff:ff ARP Who has 10.0.0.1?  Tell 192.168.0.1 (duplicate use of 192.168.0.1 detected!)
2021-04-13 17:30:46.360633 e8:37:7a:94:36:45 -> ff:ff:ff:ff:ff:ff ARP Who has 10.11.85.254?  Tell 10.11.85.13
2021-04-13 17:30:46.360934 a4:4c:11:b8:b3:41 -> e8:37:7a:94:36:45 ARP 10.11.85.254 is at a4:4c:11:b8:b3:41
2021-04-13 17:30:46.365135 a4:4c:11:b8:b3:41 -> ff:ff:ff:ff:ff:ff ARP Who has 10.13.100.6?  Tell 10.13.100.254
2021-04-13 17:30:46.378950 c4:e9:0a:da:a1:60 -> ff:ff:ff:ff:ff:ff ARP Who has 10.0.0.3?  Tell 192.168.0.1 (duplicate use of 192.168.0.1 detected!)
2021-04-13 17:30:46.400057 00:12:14:1f:2e:ca -> ff:ff:ff:ff:ff:ff ARP Gratuitous ARP for 192.168.26.46 (Request)
2021-04-13 17:30:46.406873 6c:3b:6b:b9:e5:79 -> ff:ff:ff:ff:ff:ff ARP Who has 85.92.122.34?  Tell 85.92.122.33
2021-04-13 17:30:46.449791 d4:6e:0e:e0:d3:29 -> a4:4c:11:b8:b3:41 ARP Who has 10.13.163.254?  Tell 10.13.163.27
2021-04-13 17:30:46.450198 a4:4c:11:b8:b3:41 -> d4:6e:0e:e0:d3:29 ARP 10.13.163.254 is at a4:4c:11:b8:b3:41
2021-04-13 17:30:46.457187 00:18:a9:77:7e:33 -> ff:ff:ff:ff:ff:ff ARP Who has 192.168.26.254?  Tell 192.168.26.52
2021-04-13 17:30:46.458826 58:d5:6e:dd:fa:7d -> ff:ff:ff:ff:ff:ff ARP Who has 10.0.0.1?  Tell 192.168.0.1 (duplicate use of 192.168.0.1 detected!)

Ну вот вас ничего не смущает? Что за 192.168.0.1?

Пахнет дефолтным роутером каким-то

он меня смущает, но его запросы от нескольких портов. Какэто может быть?

2021-04-13 17:41:55.141134 c4:e9:0a:da:bc:fc -> ff:ff:ff:ff:ff:ff ARP Who has 10.0.0.3?  Tell 192.168.0.1
2021-04-13 17:41:55.244201 c4:e9:0a:da:a7:18 -> ff:ff:ff:ff:ff:ff ARP Who has 10.0.0.1?  Tell 192.168.0.1 (duplicate use of 192.168.0.1 detected!)
2021-04-13 17:41:55.573401 f0:b4:d2:80:74:80 -> ff:ff:ff:ff:ff:ff ARP Who has 10.0.0.1?  Tell 192.168.0.1 (duplicate use of 192.168.0.1 detected!)
2021-04-13 17:41:55.664446 fc:8b:97:70:16:15 -> ff:ff:ff:ff:ff:ff ARP Who has 10.0.0.3?  Tell 192.168.0.1 (duplicate use of 192.168.0.1 detected!)
2021-04-13 17:41:55.680680 c4:e9:0a:db:b7:f4 -> ff:ff:ff:ff:ff:ff ARP Who has 10.0.0.3?  Tell 192.168.0.1 (duplicate use of 192.168.0.1 detected!)
2021-04-13 17:41:55.734095 c4:e9:0a:db:a6:00 -> ff:ff:ff:ff:ff:ff ARP Who has 10.0.0.3?  Tell 192.168.0.1 (duplicate use of 192.168.0.1 detected!)
2021-04-13 17:41:55.773433 c4:e9:0a:da:c1:b8 -> ff:ff:ff:ff:ff:ff ARP Who has 10.0.0.1?  Tell 192.168.0.1 (duplicate use of 192.168.0.1 detected!)
2021-04-13 17:41:56.135423 f0:b4:d2:80:7c:74 -> ff:ff:ff:ff:ff:ff ARP Who has 10.0.0.1?  Tell 192.168.0.1 (duplicate use of 192.168.0.1 detected!)
2021-04-13 17:41:56.141050 c4:e9:0a:da:bc:fc -> ff:ff:ff:ff:ff:ff ARP Who has 10.0.0.3?  Tell 192.168.0.1
2021-04-13 17:41:56.229012 c4:e9:0a:63:9e:ac -> ff:ff:ff:ff:ff:ff ARP Who has 10.0.0.3?  Tell 192.168.0.1 (duplicate use of 192.168.0.1 detected!)
2021-04-13 17:41:56.244154 c4:e9:0a:da:a7:18 -> ff:ff:ff:ff:ff:ff ARP Who has 10.0.0.1?  Tell 192.168.0.1 (duplicate use of 192.168.0.1 detected!)
2021-04-13 17:41:56.549572 c4:e9:0a:da:a2:94 -> ff:ff:ff:ff:ff:ff ARP Who has 10.0.0.3?  Tell 192.168.0.1 (duplicate use of 192.168.0.1 detected!)
2021-04-13 17:41:56.573329 f0:b4:d2:80:74:80 -> ff:ff:ff:ff:ff:ff ARP Who has 10.0.0.1?  Tell 192.168.0.1 (duplicate use of 192.168.0.1 detected!)
2021-04-13 17:41:56.664428 fc:8b:97:70:16:15 -> ff:ff:ff:ff:ff:ff ARP Who has 10.0.0.3?  Tell 192.168.0.1 (duplicate use of 192.168.0.1 detected!)
2021-04-13 17:41:56.734039 c4:e9:0a:db:a6:00 -> ff:ff:ff:ff:ff:ff ARP Who has 10.0.0.3?  Tell 192.168.0.1 (duplicate use of 192.168.0.1 detected!)
2021-04-13 17:41:56.802570 c4:e9:0a:db:bb:30 -> ff:ff:ff:ff:ff:ff ARP Who has 10.0.0.3?  Tell 192.168.0.1 (duplicate use of 192.168.0.1 detected!)
2021-04-13 17:41:56.834851 c4:e9:0a:db:b7:b8 -> ff:ff:ff:ff:ff:ff ARP Who has 10.0.0.1?  Tell 192.168.0.1 (duplicate use of 192.168.0.1 detected!)
2021-04-13 17:41:57.135402 f0:b4:d2:80:7c:74 -> ff:ff:ff:ff:ff:ff ARP Who has 10.0.0.1?  Tell 192.168.0.1 (duplicate use of 192.168.0.1 detected!)

много маков

кто-то зеркалит мак шлюза, или у тебя петля

или ручками выставили .1

но я больше склоняюсь к петле

товарищ не согласен с версией петли я с час назад предложил колечко поискать)

и они с разных портов нексуса😳

ну и что? значит за разными портами нексуса включено одно устройство, многопортовое)))

или там ваш подконтрольный периметр и вы знаете что там в портах?

это его проблемы

справедливо :D

Ну колечко это называется, привет vlan1

+1