Alcatel-Lucent 6850-48 网络指南
Configuring DHCP Security Features
Configuring DHCP Relay
page 31-24
OmniSwitch AOS Release 6 Network Configuration Guide
September 2009
Layer 2 DHCP Snooping
By default, DHCP broadcasts are flooded on the default VLAN of the client/server port. If the DHCP
client and server are both members of the same VLAN domain, the broadcast packets from these sources
are bridged as Layer 2 traffic and not processed by the relay agent.
client and server are both members of the same VLAN domain, the broadcast packets from these sources
are bridged as Layer 2 traffic and not processed by the relay agent.
When DHCP Snooping is enabled at the switch level or for an individual VLAN, DHCP Snooping func-
tionality is also applied to Layer 2 traffic. When DHCP Snooping is disabled at the switch level or
disabled on the last VLAN to have snooping enabled on the switch, DHCP Snooping functionality is no
longer applied to Layer 2 or Layer 3 traffic.
tionality is also applied to Layer 2 traffic. When DHCP Snooping is disabled at the switch level or
disabled on the last VLAN to have snooping enabled on the switch, DHCP Snooping functionality is no
longer applied to Layer 2 or Layer 3 traffic.