Cabletron Systems HSIM-W6 manual UDP Port Numbers, UDP Port # UDP Services

Chapter 7: General Configuration Using Local Management

Enabling IP Forwarding on a Port

By default, IP Forwarding is disabled on each router port. Your device will not begin forwarding IP data packets on any router port until you enable IP Forwarding on that port.

To enable IP Forwarding on a router port, complete the following steps:

1.Use the arrow keys to highlight the IP Forwarding field.

2.Use the ENTER key to toggle the entry to ENABLED.

3.Use the arrow keys to highlight the SAVE command at the bottom of the screen and then press ENTER. The message “SAVED OK” displays.

Configuring the UDP Broadcast Redirector

In order to locate a server that can provide a particular network service, many IP hosts rely on the use of LAN broadcasts to send UDP service requests. The UDP port number contained in the broadcast request packet identifies the service being requested. Table 23 shows the port numbers and their corresponding requested services.

	Table 23 UDP Port Numbers
UDP Port #	UDP Services
37	Time
42	Host Name Server
53	Domain Name Server
65	TACACS-Database Service
67	Bootstrap Protocol/Dynamic Host Control Protocol Server
68	Bootstrap Protocol/Dynamic Host Control Protocol Client
69	Trivial File Transfer
137	NETBIOS Name Server
138	NETBIOS Datagram Server
111	Sunrpc (NIS)

148 HSIM-W6 User’s Guide