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Catalyst 3550 Multilayer Switch Software Configuration Guide
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Chapter 19 Configuring DHCP Features
Displaying DHCP Information
Displaying DHCP Information
You can display a DHCP snooping binding table and configuration information for all interfaces on a
switch. To display the status of the insertion and removal of the DHCP option-82 field on all interfaces,
use the show running-config privideged EXEC command.
Displaying a Binding Table
The DHCP snooping binding table for each switch has binding entries that correspond to untrusted ports.
The table does not have information about hosts interconnected with a trusted port because each
interconnected switch has its own DHCP snooping binding table.
This example shows how to display the DHCP snooping binding entries for a switch.
Switch# show ip dhcp snooping binding
MacAddress IpAddress Lease(sec) Type VLAN Interface
------------------ --------------- ---------- ------- ---- --------------------
00:30:94:C2:EF:35 41.0.0.51 286 dynamic 41 FastEthernet0/3
00:D0:B7:1B:35:DE 41.0.0.52 237 dynamic 41 FastEthernet0/3
00:00:00:00:00:01 40.0.0.46 286 dynamic 40 FastEthernet0/9
00:00:00:00:00:03 42.0.0.33 286 dynamic 42 FastEthernet0/9
00:00:00:00:00:02 41.0.0.53 286 dynamic 41 FastEthernet0/9
describes the fields in the show ip dhcp snooping binding command output.
Table 19-2 show ip dhcp snooping binding Command Output
Field
Description
MAC Address
Client hardware MAC address
IP Address
Client IP address assigned from the DHCP server
Lease (seconds)
IP address lease time
Type
Binding type; dynamic binding learned by DHCP snooping or statically
configured binding
VLAN
VLAN number of the client interface
Interface
Interface that connects to the DHCP client host