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Configuration Guide 583
Configuring Network Security
DHCP Snooping Configuration
Step 2
interface {
fastEthernet
port
|
range fastEthernet
port-list
|
gigabitEthernet
port |
range
gigabitEthernet
port-list
|
interface port-channel
port-channel-id
|
interface range
port-
channel
port-channel-id-list
}
Enter interface configuration mode.
Step 3
ip dhcp snooping information option
Enable the Option 82 feature on the port.
Step 4
ip dhcp snooping information strategy
{
keep | replace | drop
}
Specify the operation for the Option 82 field of the DHCP request packets from the Host.
The following options are provided:
keep
: Indicates keeping the Option 82 field of the packets.
replace
: Indicates replacing the Option 82 field of the packets with one defined by switch.
By default, the Circuit ID is defined to be the VLAN and the number of the port which
receives the DHCP Request packets. The Remote ID is defined to be the MAC address of
the DHCP Snooping device which receives the DHCP Request packets.
drop
: Indicates discarding the packets that include the Option 82 field.
Step 5
ip dhcp snooping information circuit-id
string
Configure the circuit ID. The circuit ID configurations of the switch and the DHCP server
should be compatible with each other.
string:
Enter the circuit ID, which contains up to 64 characters.
Step 6
ip dhcp snooping information remote-id
string
Configure the remote ID. The remote ID configurations of the switch and the DHCP server
should be compatible with each other.
string:
Enter the remote ID, which contains up to 64 characters.
Step 7
show ip dhcp snooping information interface { fastEthernet
port
| gigabitEthernet
port
|
port-channel
port-channel-id
}
Verify the Option 82 configuration of the port.
Step 8
end
Return to privileged EXEC mode.
Step 9
copy running-config startup-config
Save the settings in the configuration file.
The following example shows how to enable Option 82 on port 1/0/7 and configure the
strategy as replace, the circuit-id as VLAN20 and the remote-id as Host1:
Switch#configure
Switch(config)#interface gigabitEthernet
1/0/7
Switch(config-if)#ip dhcp snooping information option
Содержание T2500G-10MPS
Страница 1: ...User Guide T2500G 10MPS 1910012405 REV1 0 1 April 2018...
Страница 24: ...Using the CLI 767 Appendix Default Parameters 773...
Страница 27: ...Part 1 Accessing the Switch CHAPTERS 1 Overview 2 Web Interface Access 3 Command Line Interface Access...
Страница 129: ...Part 4 Configuring LAG CHAPTERS 1 LAG 2 LAG Configuration 3 Configuration Example 4 Appendix Default Parameters...
Страница 145: ...Part 5 Monitoring Traffic CHAPTERS 1 Traffic Monitor 2 Appendix Default Parameters...
Страница 172: ...Part 7 Configuring DDM CHAPTERS 1 Overview 2 DDM Configuration 3 Appendix Default Parameters...
Страница 190: ...Part 8 Configuring L2PT CHAPTERS 1 Overview 2 L2PT Configuration 3 Configuration Example 4 Appendix Default Parameters...
Страница 274: ...Part 13 Configuring GVRP CHAPTERS 1 Overview 2 GVRP Configuration 3 Configuration Example 4 Appendix Default Parameters...
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