Configuring UDP Helper
The UDP helper function relays the UDP broadcast packets destined for specified ports.
Pre-configuration Tasks
Before configuring UDP helper, complete the following task:
Configuring a reachable route from the router to the destination server
.
Procedure
- Run system-view
The system view is displayed.
- Run udp-helper enable
UDP helper is enabled.
- (Optional)
Run udp-helper port { port-number | dns | netbios-ds | netbios-ns | tacacs | tftp | time }
The UDP destination port to which UDP broadcast packets are relayed is specified.
After UDP helper is enabled, the router relays the UDP packets with the following destination ports by default: Time (37), TACACS (49), DNS (53), TFTP (69), NetBIOS-NS (137), and NetBIOS-DS (138). If the UDP destination port you want to specify is among the six ports, skip this step.
- Run interface interface-type interface-number
The interface view is displayed.
The interface must be a VLANIF interface, Layer 3 Ethernet interface, or Layer 3 Ethernet sub-interface.
- Run udp-helper server ip-address
The destination server for UDP helper is specified.
