Dell PowerConnect M6348 Cli Reference Manual page 616

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 [
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-
auto-rp (port 496), rip (port 520), tacacs (port 49), tftp (port 69), and time (port 37). Other
ports must be specified by number.
Default Configuration
No helper addresses are configured.
Command Mode
Interface Configuration (VLAN) mode.
User Guidelines
This command can be invoked multiple times on routing interface, either to specify multiple
server addresses for a given port number or to specify multiple port numbers handled by a
specific server.
The command no ip helper-address with no arguments clears all helper addresses on the
interface.
Example
To relay DHCP packets received on vlan 5 to two DHCP servers,
192.168.10.1 and 192.168.20.1, use the following commands:
console#config
console(config)#interface vlan 5
616
server-address | discard ] [ dest-udp-port | dhcp | domain | isakmp |