D-Link xStack Reference Manual page 1023

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xStack DGS-3120 Series Layer 3 Managed Gigabit Switch CLI Reference Guide
Parameters
None.
Restrictions
Only Administrator, Operator and Power-User level users can issue this command.
Example
To disable the UDP helper function:
DGS-3120-24TC:admin#disable udp_helper
Command: disable udp_helper
Success.
DGS-3120-24TC:admin#
112-3 config udp_helper udp_port add
Description
This command is used to add a UDP port for UDP helper function on the Switch.
Format
config udp_helper udp_port add [time | tacacs | dns | tftp | netbios-ns | netbios-ds |
<port_number 0-65535>]
Parameters
time – Time service. The UDP port is 37.
tacacs - Terminal Access Controller Access Control System service. The UDP port number is 49.
dns - Domain Naming System. The UDP port number is 53.
tftp - Trivial File Transfer Protocol. The UDP port number is 69.
netbios-ns - NetBIOS Name Server. The UDP port number is 137.
netbios-ds - NetBIOS Datagram Server. The UDP port number is 138.
<port_number 0-65535> - Specify other UDP ports, except the port 67 and 68. These two ports
are reserved for DHCP function.
Restrictions
Only Administrator, Operator and Power-User level users can issue this command.
Example
To add a UDP port:
1018