How To Configure Dhcp Features; Default Dhcp Snooping Configuration - Cisco Catalyst 2960-XR Security Configuration Manual

How to Configure DHCP Features

All snooping statistics are generated on the stack master. If a new stack master is elected, the statistics counters
reset.
When a stack merge occurs, all DHCP snooping bindings in the stack master are lost if it is no longer the
stack master. With a stack partition, the existing stack master is unchanged, and the bindings belonging to the
partitioned switches age out. The new master of the partitioned stack begins processing the new incoming
DHCP packets.
How to Configure DHCP Features

Default DHCP Snooping Configuration

Table 17: Default DHCP Configuration
Feature
DHCP server
DHCP relay agent
DHCP packet forwarding address
Checking the relay agent information
DHCP relay agent forwarding policy
DHCP snooping enabled globally
DHCP snooping information option
DHCP snooping option to accept packets on untrusted
input interfaces
DHCP snooping limit rate
DHCP snooping trust
DHCP snooping VLAN
DHCP snooping MAC address verification
Cisco IOS DHCP server binding database
Catalyst 2960-XR Switch Security Configuration Guide, Cisco IOS Release 15.0(2)EX1
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4
Default Setting
Enabled in Cisco IOS software, requires configuration
3
Enabled
None configured
Enabled (invalid messages are dropped)
Replace the existing relay agent information
Disabled
Enabled
Disabled
None configured
Untrusted
Disabled
Enabled
Enabled in Cisco IOS software, requires configuration.
Note The switch gets network addresses and
configuration parameters only from a device
configured as a DHCP server.
Configuring DHCP
2
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