Security
ip arp inspection vlan <id>
Dynamic ARP Inspection — validate ARP replies on those VLANs against the DHCP-snooping binding table.
Works on: SwitchMode: config
Watch out
Configuration-only in this lab: no host here forges ARP, so nothing is ever dropped by it. 'show ip arp inspection' still reflects the config.
Run this command live
Don't just read it — type ip arp inspection vlan <id> in a real network simulator in your browser and watch it take effect. No install, no account needed to start.
Frequently asked
What does the "ip arp inspection vlan <id>" command do?
Dynamic ARP Inspection — validate ARP replies on those VLANs against the DHCP-snooping binding table.
What's the common gotcha with "ip arp inspection vlan <id>"?
Configuration-only in this lab: no host here forges ARP, so nothing is ever dropped by it. 'show ip arp inspection' still reflects the config.
More Security commands
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