Dell PowerConnect 6248 Command Line Interface Guide - Page 712

To relay UDP packets received on any interface for all default ports (Table 4) to the server at 20.1.1.1, use the following commands: console#config console(config)#ip helper-address 20.1.1.1 ip helper-address (interface configuration) Use the ip helper-address (interface configuration) command to configure the relay of certain UDP broadcast packets received on a specific interface. To delete a relay entry on an interface, use the no form of this command. Syntax ip helper-address { server-address | discard } [ dest-udp-port | dhcp | domain | isakmp | mobile ip | nameserver | netbios-dgm | netbios-ns | ntp | pim-auto-rp | rip | tacacs | tftp | time ] no ip helper-address [server-address | discard ] [ dest-udp-port | dhcp | domain | isakmp | mobile-ip | nameserver | netbios-dgm | netbios-ns | ntp | pim-auto-rp | rip | tacacs | tftp | time ] • server-address - The IPv4 unicast or directed broadcast address to which relayed UDP broadcast packets are sent. The server address cannot be an IP address configured on any interface of the local router. • discard - Matching packets should be discarded rather than relayed, even if a global ip helper-address configuration matches the packet. • dest-udp-port - A destination UDP port number from 0 to 65535. • port-name - The destination UDP port may be optionally specified by its name. Whether a port is specified by its number or its name has no effect on behavior. The names recognized are as follows: dhcp (port 67), domain (port 53), isakmp (port 500), mobile-ip (port 434), nameserver (port 42), netbios-dgm (port 138), netbios-ns (port 137), ntp (port 123), pim-autorp (port 496), rip (port 520), tacacs (port 49), tftp (port 69), and time (port 37). Other ports must be specified by number. 712 IP Helper Commands