![background image](http://html.mh-extra.com/html/cisco/catalyst-3560-x-series/catalyst-3560-x-series_software-configuration-manual_66795665.webp)
1-13
Catalyst 3750-X and 3560-X Switch Software Configuration Guide
OL-25303-03
Chapter 1 Configuring DHCP Features and IP Source Guard
Configuring DHCP Features
Step 5
ip dhcp snooping information option
format remote-id
[
string
ASCII-string
|
hostname
]
(Optional) Configure the remote-ID suboption.
You can configure the remote ID as:
•
String of up to 63 ASCII characters (no spaces)
•
Configured 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.
Step 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.
Step 7
interface
interface-id
Specify the interface to be configured, and enter interface configuration
mode.
Step 8
ip dhcp snooping vlan
vlan
information
option format-type circuit-id
[
override
]
string
ASCII-string
(Optional) Configure the circuit-ID suboption for the specified interface.
Specify the VLAN and port identifier, using a VLAN ID in the range of 1
to 4094. The default circuit ID is the port identifier, in the format
vlan-mod-port
.
You can configure the circuit ID to be a string of 3 to 63 ASCII characters
(no spaces).
(Optional) Use the
override
keyword when you do not want the
circuit-ID suboption inserted in TLV format to define subscriber
information.
Step 9
ip dhcp snooping trust
(Optional) Configure the interface as trusted or untrusted. Use the
no
keyword to configure an interface to receive messages from an untrusted
client. The default setting is untrusted.
Step 10
ip dhcp snooping limit rate
rate
(Optional) Configure the number of DHCP packets per second that an
interface can receive. The range is 1 to 2048. By default, no rate limit is
configured.
Note
We recommend an untrusted rate limit of not more than 100
packets per second. If you configure rate limiting for trusted
interfaces, you might need to increase the rate limit if the port is
a trunk port assigned to more than one VLAN with DHCP
snooping.
Step 11
exit
Return to global configuration mode.
Step 12
ip dhcp snooping verify mac-address
(Optional) Configure the switch to verify that the source MAC address in
a DHCP packet received on untrusted ports matches the client hardware
address in the packet. The default is to verify that the source MAC
address matches the client hardware address in the packet.
Step 13
end
Return to privileged EXEC mode.
Command
Purpose
Summary of Contents for Catalyst 3560-X Series
Page 12: ...Contents 10 Catalyst 3750 X and 3560 X Switch Software Configuration Guide OL 25303 03 ...
Page 13: ...Contents 11 Catalyst 3750 X and 3560 X Switch Software Configuration Guide OL 25303 03 ...
Page 14: ...Contents 12 Catalyst 3750 X and 3560 X Switch Software Configuration Guide OL 25303 03 ...
Page 15: ...Contents 13 Catalyst 3750 X and 3560 X Switch Software Configuration Guide OL 25303 03 ...
Page 16: ...Contents 14 Catalyst 3750 X and 3560 X Switch Software Configuration Guide OL 25303 03 ...
Page 17: ...Contents 15 Catalyst 3750 X and 3560 X Switch Software Configuration Guide OL 25303 03 ...
Page 18: ...Contents 16 Catalyst 3750 X and 3560 X Switch Software Configuration Guide OL 25303 03 ...
Page 19: ...Contents 17 Catalyst 3750 X and 3560 X Switch Software Configuration Guide OL 25303 03 ...
Page 20: ...Contents 18 Catalyst 3750 X and 3560 X Switch Software Configuration Guide OL 25303 03 ...
Page 21: ...Contents 19 Catalyst 3750 X and 3560 X Switch Software Configuration Guide OL 25303 03 ...
Page 22: ...Contents 20 Catalyst 3750 X and 3560 X Switch Software Configuration Guide OL 25303 03 ...
Page 23: ...Contents 21 Catalyst 3750 X and 3560 X Switch Software Configuration Guide OL 25303 03 ...
Page 24: ...Contents 22 Catalyst 3750 X and 3560 X Switch Software Configuration Guide OL 25303 03 ...
Page 25: ...Contents 23 Catalyst 3750 X and 3560 X Switch Software Configuration Guide OL 25303 03 ...
Page 26: ...Contents 24 Catalyst 3750 X and 3560 X Switch Software Configuration Guide OL 25303 03 ...
Page 27: ...Contents 25 Catalyst 3750 X and 3560 X Switch Software Configuration Guide OL 25303 03 ...
Page 28: ...Contents 26 Catalyst 3750 X and 3560 X Switch Software Configuration Guide OL 25303 03 ...
Page 29: ...Contents 27 Catalyst 3750 X and 3560 X Switch Software Configuration Guide OL 25303 03 ...
Page 30: ...Contents 28 Catalyst 3750 X and 3560 X Switch Software Configuration Guide OL 25303 03 ...
Page 31: ...Contents 29 Catalyst 3750 X and 3560 X Switch Software Configuration Guide OL 25303 03 ...
Page 32: ...Contents 30 Catalyst 3750 X and 3560 X Switch Software Configuration Guide OL 25303 03 ...
Page 33: ...Contents 31 Catalyst 3750 X and 3560 X Switch Software Configuration Guide OL 25303 03 ...
Page 34: ...Contents 32 Catalyst 3750 X and 3560 X Switch Software Configuration Guide OL 25303 03 ...
Page 35: ...Contents 33 Catalyst 3750 X and 3560 X Switch Software Configuration Guide OL 25303 03 ...
Page 36: ...Contents 34 Catalyst 3750 X and 3560 X Switch Software Configuration Guide OL 25303 03 ...
Page 37: ...Contents 35 Catalyst 3750 X and 3560 X Switch Software Configuration Guide OL 25303 03 ...
Page 38: ...Contents 36 Catalyst 3750 X and 3560 X Switch Software Configuration Guide OL 25303 03 ...
Page 42: ...56 Catalyst 3750 X and 3560 X Switch Software Configuration Guide OL 25303 03 Preface ...
Page 1538: ...Index IN 58 Catalyst 3750 X and 3560 X Switch Software Configuration Guide OL 25303 03 ...