Cisco IE 4000 Software Configuration Guide

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Configuring DHCP
How to Configure DHCP
Enabling DHCP Snooping and Option 82
6. interface range port-range
or
interface interface-id
Configures multiple physical ports that are
connected to the DHCP clients, and enters interface
range configuration mode.
or
Configures a single physical port that is connected to
the DHCP client, and enters interface configuration
mode.
7. switchport mode access Defines the VLAN membership mode for the port.
8. switchport access vlan vlan-id Assigns the ports to the same VLAN as configured in
Step 2.
9. end Returns to privileged EXEC mode.
Command Purpose
Command Purpose
1. configure terminal Enters global configuration mode.
2. ip dhcp snooping Enables DHCP snooping globally.
3. ip dhcp snooping vlan vlan-range Enables DHCP snooping on a VLAN or range of VLANs. The range is
1 to 4096.
You can enter a single VLAN ID identified by VLAN ID number, a series of
VLAN IDs separated by commas, a range of VLAN IDs separated by
hyphens, or a range of VLAN IDs separated by entering the starting and
ending VLAN IDs separated by a space.
4. ip dhcp snooping information option Enables the switch to insert and to remove DHCP relay information
(option-82 field) in forwarded DHCP request messages to the DHCP
server. This is the default setting.
5. ip dhcp snooping information option
format remote-id [string ASCII-string |
hostname]
(Optional) Configures the remote-ID suboption.
You can configure the remote ID as
 String of up to 63 ASCII characters (no spaces)
 Hostname for the switch
Note: If the hostname is longer than 63 characters, it is truncated to 63
characters in the remote-ID configuration.
The default remote ID is the switch MAC address.
6. ip dhcp snooping information option
allow-untrusted
(Optional) If the switch is an aggregation switch connected to an edge
switch, enable the switch to accept incoming DHCP snooping packets
with option-82 information from the edge switch.
The default setting is disabled.
Note: Enter this command only on aggregation switches that are
connected to trusted devices.
7. interface interface-id Specifies the interface to be configured, and enters interface
configuration mode.

Cisco IE 4000 Specifications

General

Product Type	Switch
Form Factor	DIN Rail Mountable
MAC Address Table Size	8000
Jumbo Frame Support	9216 bytes
Operating Temperature	-40°C to 70°C
Mean Time Between Failures (MTBF)	Over 500, 000 hours
Memory	256 MB DRAM
Mounting	DIN Rail, Wall
Certifications	EN 50121-4
Ports	8 x 10/100Base-TX Ethernet Ports