Cisco Systems 3560X Manual De Usuario
24-8
Catalyst 3750-X and 3560-X Switch Software Configuration Guide
OL-21521-01
Chapter 24 Configuring DHCP Features and IP Source Guard
Configuring DHCP Features
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. For more information about switch stacks, see
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. For more information about switch stacks, see
Configuring DHCP Features
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Default DHCP Configuration
Table 24-1
Default DHCP Configuration
Feature
Default Setting
DHCP server
Enabled in Cisco IOS software, requires
configuration
configuration
1
DHCP relay agent
Enabled
2
DHCP packet forwarding address
None configured
Checking the relay agent information
Enabled (invalid messages are dropped)
DHCP relay agent forwarding policy
Replace the existing relay agent information
DHCP snooping enabled globally
Disabled
DHCP snooping information option
Enabled
DHCP snooping option to accept packets on
untrusted input interfaces
untrusted input interfaces
3
Disabled
DHCP snooping limit rate
None configured
DHCP snooping trust
Untrusted
DHCP snooping VLAN
Disabled
DHCP snooping MAC address verification
Enabled