Configure DHCP Relay on a Port or VLAN
You can view and configure the DHCP parameters on a specific port or VLAN.
Before you begin
You must configure an IP interface on the interface.
Procedure
Variable Definitions
Use the data in the following table to use the ip dhcp-relay command.
Note
The no ip dhcp-relay command disables DHCP Relay, it does not delete the DHCP entry.
Variable |
Value |
---|---|
broadcast |
Enables the device to send the server reply as a broadcast to the end station. After you disable this variable, the device sends the server reply as a unicast to the end station. |
circuitId |
Enables Option 82 circuit ID on the interface. |
clear-counters |
Clears DHCP Relay counters for the interface. |
fwd-path <A.B.C.D> [vrid <1-255>] |
Creates a forward path server with a virtual router ID (or VRRP ID), a mode, and a state. A.B.C.D is the IP address. vrid <1-255> is the ID of the virtual router and is an integer from 1 to 255. |
fwd-path <A.B.C.D> disable [vrid <1-255>] |
Disables a forward path server with a specific value and virtual router ID. A.B.C.D is the IP address. vrid <1-255> is the ID of the virtual router (or VRRP ID). |
fwd-path <A.B.C.D> enable [vrid <1-255>] |
Enables a forward path server with a specific value and virtual router ID (or VRRP ID). A.B.C.D is the IP address. vrid <1-255> is the ID of the virtual router (or VRRP ID). |
fwd-path <A.B.C.D> mode <bootp|bootp_dhcp|dhcp> [vrid <1-255>] |
Configures the forward path mode for a VLAN. This command string is available only in VLAN Interface Configuration mode. A.B.C.D is the IP address. vrid <1-255> is the ID of the virtual router (or VRRP ID). |
max-hop <1-16> |
Configures the maximum number of hops before a BootP/DHCP packet is discarded. The default is 4. |
min-sec <0-65535> |
Configures the minimum seconds count for DHCP. If the secs field in the BootP/DHCP packet header is greater than this value, the device relays or forwards the packet; otherwise, the packet is dropped. The default is 0 seconds. |
mode <bootp|bootp_dhcp|dhcp> |
Configures DHCP mode to forward BootP messages only, DHCP messages only, or both. The default is both. |
remoteId |
Enables Option82 remote ID on the interface. |
trusted |
Configures the DHCP circuit as trusted. |
include-secondary <parallel | sequential> |
Enables DHCP Smart Relay in one of the following modes:
By default, Smart Relay is disabled. Note:
This parameter is optional and applies only to a VLAN interface. |