Configuring The Dhcp Trust State On Layer 2 Lan Interfaces - Cisco 7604 Configuration Manual
Ios software configuration guide
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Chapter 37
Configuring DHCP Snooping
DHCP snooping is configured on the following Interfaces:
Insertion of option 82 is enabled
Verification of hwaddr field is enabled
Interface
------------------------
Router#
Configuring the DHCP Trust State on Layer 2 LAN Interfaces
To configure DHCP trust state on a Layer 2 LAN interface, perform this task:
Command
Step 1
Router(config)# interface { type
port-channel number }
Step 2
Router(config-if)# ip dhcp snooping trust
Router(config-if)# no ip dhcp snooping trust
Step 3
Router(config-if)# do show ip dhcp snooping |
begin pps
1.
type = ethernet, fastethernet, gigabitethernet, or tengigabitethernet
This example shows how to configure Fast Ethernet port 5/12 as trusted:
Router# configure terminal
Router(config)# interface FastEthernet 5/12
Router(config-if)# ip dhcp snooping trust
Router(config-if)# do show ip dhcp snooping | begin pps
Interface
------------------------
FastEthernet5/12
Router#
This example shows how to configure Fast Ethernet port 5/12 as untrusted:
Router# configure terminal
Router(config)# interface FastEthernet 5/12
Router(config-if)# no ip dhcp snooping trust
Router(config-if)# do show ip dhcp snooping | begin pps
Interface
------------------------
FastEthernet5/12
Router#
OL-4266-08
Trusted
Rate limit (pps)
-------
----------------
Purpose
1
Selects the interface to configure.
slot/port |
Note
Configures the interface as trusted.
Reverts to the default (untrusted) state.
Verifies the configuration.
Trusted
Rate limit (pps)
-------
----------------
yes
unlimited
Trusted
Rate limit (pps)
-------
----------------
no
unlimited
Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX
Configuring DHCP Snooping
Select only LAN ports configured with the
switchport command or Layer 2 port-channel
interfaces.
37-13
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