Switching Commands
133
M4100 Series ProSAFE Managed Switches
DHCP L2 Relay Agent Commands
You can enable the switch to operate as a DHCP Layer 2 relay agent to relay DHCP requests
from clients to a Layer 3 relay agent or server. The Circuit ID and Remote ID can be added to
DHCP requests relayed from clients to a DHCP server. This information is included in DHCP
Option 82, as specified in sections 3.1 and 3.2 of RFC3046.
dhcp l2relay
Use this command to enable the DHCP Layer 2 Relay agent for an interface, a range of
interfaces, or all interfaces. The subsequent commands mentioned in this section can be
used only when the DHCP L2 relay is enabled.
• Global Config
• Interface Config
no dhcp l2relay
Use this command to disable the DHCP Layer 2 relay agent for an interface or range of
interfaces.
• Global Config
• Interface Config
dhcp l2relay circuit-id vlan
Use this parameter to set the DHCP Option-82 Circuit ID for a VLAN. When enabled, the
interface number is added as the Circuit ID in DHCP option 82. Vlan-list range is 1–4093.
Separate non-consecutive IDs with a comma (,), and do not insert spaces or zeros in
between the range. Use a dash (–) for the range.
no dhcp l2relay circuit-id vlan
Use this parameter to clear the DHCP Option-82 Circuit ID for a VLAN.
Format dhcp l2relay
Modes
Format no dhcp l2relay
Modes
Format dhcp l2relay circuit-id vlan <vlan-list>
Mode Global Config
Format no dhcp l2relay circuit-id vlan <vlan-list>
Mode Global Config
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