Cisco 4500M User Manual

33-9
Software Configuration Guide—Release 12.2(25)EW
OL-6696-01
Chapter 33 Configuring DHCP Snooping and IP Source Guard
Displaying DHCP Snooping Information
Last Succeded Time : 15:24:34 UTC Sun Jul 8 2001
Last Failed Time : None
Last Failed Reason : No failure recorded.
Total Attempts : 1 Startup Failures : 0
Successful Transfers : 1 Failed Transfers : 0
Successful Reads : 1 Failed Reads : 0
Successful Writes : 0 Failed Writes : 0
Media Failures : 0
Switch#
Switch# sh ip dhcp snoop bind
MacAddress IpAddress Lease(sec) Type VLAN Interface
------------------ --------------- ---------- ------------- ---- --------------------
00:01:00:01:00:05 1.1.1.1 49810 dhcp-snooping 512 GigabitEthernet1/1
00:01:00:01:00:02 1.1.1.1 49810 dhcp-snooping 512 GigabitEthernet1/1
00:01:00:01:00:04 1.1.1.1 49810 dhcp-snooping 1536 GigabitEthernet1/1
00:01:00:01:00:03 1.1.1.1 49810 dhcp-snooping 1024 GigabitEthernet1/1
00:01:00:01:00:01 1.1.1.1 49810 dhcp-snooping 1 GigabitEthernet1/1
Switch#
Switch#clear ip dhcp snoop bind
Switch#sh ip dhcp snoop bind
MacAddress IpAddress Lease(sec) Type VLAN Interface
------------------ --------------- ---------- ------------- ---- --------------------
Switch#
Example 3: Adding Information to the DHCP Snooping Database
To manually add a binding to the DHCP snooping database, perform the following task:
This example shows how to manually add a binding to the DHCP snooping database:
Switch# show ip dhcp snooping binding
MacAddress IpAddress Lease(sec) Type VLAN Interface
------------------ --------------- ---------- ------------- ---- --------------------
Switch#
Switch# ip dhcp snooping binding 1.1.1 vlan 1 1.1.1.1 interface gi1/1 expiry 1000
Switch# show ip dhcp snooping binding
MacAddress IpAddress Lease(sec) Type VLAN Interface
------------------ --------------- ---------- ------------- ---- --------------------
00:01:00:01:00:01 1.1.1.1 992 dhcp-snooping 1 GigabitEthernet1/1
Switch#
Displaying DHCP Snooping Information
You can display a DHCP snooping binding table and configuration information for all interfaces on a
switch.
Command Purpose
Step 1
Switch# show ip dhcp snooping binding
Views the DHCP snooping database
Step 2
Switch# ip dhcp snooping binding binding-id vlan
vlan-id interface interface expiry lease-time
Adds the binding using the 'ip dhcp snooping' exec
command
Step 3
Switch# show ip dhcp snooping binding
Checks the DHCP snooping database

Cisco 4500M Specifications

General

Brand	Cisco
Model	4500M
Category	Network Router
Language	English