Displaying Dhcp Information - Cisco Catalyst 3550 series Software Configuration Manual

Chapter 19 Configuring DHCP Features

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
------------------
00:30:94:C2:EF:35
00:D0:B7:1B:35:DE
00:00:00:00:00:01
00:00:00:00:00:03
00:00:00:00:00:02
Table 19-2
Table 19-2 show ip dhcp snooping binding Command Output
Field
MAC Address
IP Address
Lease (seconds)
Type
VLAN
Interface
78-11194-09
IpAddress
---------------
41.0.0.51
41.0.0.52
40.0.0.46
42.0.0.33
41.0.0.53
describes the fields in the show ip dhcp snooping binding command output.
Description
Client hardware MAC address
Client IP address assigned from the DHCP server
IP address lease time
Binding type; dynamic binding learned by DHCP snooping or statically
configured binding
VLAN number of the client interface
Interface that connects to the DHCP client host
Lease(sec) Type VLAN
---------- ------- ----
286 dynamic 41
237 dynamic 41
286 dynamic 40
286 dynamic 42
286 dynamic 41
Catalyst 3550 Multilayer Switch Software Configuration Guide
Displaying DHCP Information
Interface
--------------------
FastEthernet0/3
FastEthernet0/3
FastEthernet0/9
FastEthernet0/9
FastEthernet0/9
19-9