Filter
Top Products
286
11.3.2.1 ip forward-protocol udp
Command: ip forward-protocol udp <port>
no ip forward-protocol udp <port>
Function: Set DHCP relay to forward UPD broadcast packets on the port; the “no ip
forward-protocol udp <port>” command cancels the service.
Default: DHCP relay forwards DHCP broadcast packet by default (UDP port 67).
Command mode: Global Mode
Usage Guide: The forwarding destination address is set in the “ip helper-address”
command described later.
Example: Set TFTP packets to be forwarded to 192.168.1.5.
Switch(Config)#ip forward-protocol udp 69
Switch(Config)#interface vlan 1
Switch(Config-If-Vlan1)#ip helper-address 192.168.1.5
11.3.2.2 ip helper-address
Command: ip helper-address <ip-address>
no ip helper-address <ip-address>
Function: Specify the destination address for the DHCP relay to forward UDP packets.
The “no ip helper-address <ip-address>” command cancels the setting.
Default: Address for forwarding DHCP broadcast packet is set on DHCP relay by default.
Command mode: Interface Mode
Usage Guide: The DHCP relay forwarding server address corresponds to the port
forwarding UDP, i.e., DHCP relay forwards corresponding UDP packets
only to the corresponding server instead of all UDP packets to all servers.
The default setting of DHCP relay is to forward DHCP packets on UDP port
67 to DHCP server. When this command is run after “ip forward-protocol
udp <port>” command, the forwarding address configured by this
command receives the UDP packets from <port> instead of default DHCP
packets. If a different set of UDP forwarding protocol and receiving server
address is to be set, the combination of “ip forward-protocol udp <port>”
command and this command should be used for configuration.
11.3.2.3 ip dhcp relay information policy drop
Command: ip dhcp relay information policy drop
no ip dhcp relay information policy drop
Function: When the layer 3 switch serves as the DHCP relay, users can use this