D-Link DGS-1510 Series Reference Manual page 320

DGS-1510 Series Gigabit Ethernet SmartPro Switch CLI Reference Guide

Domain Naming System (port 53)

Time service (port 37)

NetBIOS Name Server (port 137)

NetBIOS Datagram Server (port 138)

TACACS service (port 49)

IEN-116 Name Service (port 42)
If this command does not specify the port number, then the default port number are applied. BOOTP
UDP port 67 and 68 cannot be specified when the packets are forwarded by DHCP relay.
Example
This example shows how to disable the IP helper forwarding of UDP port 53 (DNS).
Switch#configure terminal
Switch(config)#no ip forward-protocol udp 53
Switch(config)#
36-5 show ip helper-address
This command is used to display the UDP helper address.
show ip helper-address [INTERFACE-ID]
Parameters
INTERFACE-ID
Default
None.
Command Mode
EXEC Mode or Any Configuration Mode.
Command Default Level
Level: 1.
Usage Guideline
Use this command to display all target addresses for the forwarding of UDP broadcast packets, or
specify the VLAN ID to display the target addresses for the VLAN interface.
Example
This example shows how to display all helper addresses.
Switch#show ip helper-address
Interface
----------
vlan100
Switch#
36-6 show ip forward-protocol udp
This command is used to display all specified UDP ports.
(Optional) Specifies to display for the specified VLAN interface.
Helper-address
---------------
172.50.71.123
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