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Show ip dhcp snooping binding

As explained in Acing the CCNA Exam: Volume 2 Advanced Networking and Security

show ip dhcp snooping binding is a Cisco IOS show command that displays the DHCP snooping binding table.

show ip dhcp snooping binding displays the DHCP Snooping binding table, allowing administrators to inspect clients that successfully leased addresses and verify DHCP message legitimacy. section 13.3 section 13.2.1

SW2# show ip dhcp snooping binding
MacAddress          IpAddress    Lease(sec)  Type           VLAN  Interface
------------------  -----------  ----------  -------------  ----  ---------
52:54:00:08:D3:E0   10.0.0.6     84617       dhcp-snooping   1    Gi0/2
52:54:00:02:F4:E1   10.0.0.7     84623       dhcp-snooping   1    Gi0/3
Total number of bindings: 2

The sample output shows each client’s MAC address, leased IP address, remaining lease duration, binding type, VLAN, and switch interface. section 13.2.1

Use the displayed bindings to:

  • Verify that a RELEASE or DECLINE received on an untrusted port matches the expected IP address and receiving interface. section 13.2.1
  • Recognize the table as a data source for Dynamic ARP Inspection, not merely as a DHCP message-verification table. section 13.2.1

How Acing the CCNA Exam: Volume 2 Advanced Networking and Security covers it

How deep it goes
Explains the command’s table contents and RELEASE or DECLINE validation, without detailing command configuration.
Examples
Shows two bindings with MAC addresses, leased IP addresses, lease durations, VLAN 1, and Gi0/2 or Gi0/3 interfaces.
What it assumes
Assumes DHCP Snooping is observing client-server exchanges and building a binding table.
What you can do after
Operate Cisco IOS verification by displaying client bindings and comparing DHCP message details against recorded entries.
How it connects
Connects DHCP Snooping bindings with RELEASE, DECLINE, untrusted ports, and Dynamic ARP Inspection.
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