Digisol DG-GS4826S Management Manual page 1128

C 47 | IP Interface Commands
HAPTER
IPv4 Interface
ip helper
NetBIOS Datagram Server
NetBIOS Name Server
NTP
TACACS service
TFTP
C M
OMMAND ODE
Global Configuration
C U
OMMAND SAGE
Up to 100 UDP ports can be specified with this command for forwarding to
one or more remote servers.
E
XAMPLE
This example enables forwarding for DHCPv6 UDP packets.
Console(config)#ip forward-protocol udp 547
Console(config)#
This command enables UDP helper globally on the switch. Use the no form
to disable this feature.
S
YNTAX
[no] ip helper
D S
EFAULT ETTING
Disabled
C M
OMMAND ODE
Global Configuration
C U
OMMAND SAGE
Network hosts occasionally use UDP broadcasts to determine
u
information such as address configuration, and domain name mapping.
These broadcasts are confined to the local subnet, either as an all hosts
broadcast (all ones broadcast - 255.255.255.255), or a directed subnet
broadcast (such as 10.10.10.255). To reduce the number of application
servers deployed in a multi-segment network, UDP helper can be used
to forward broadcast packets for specified UDP application ports to
remote servers located in another network segment.
To configure UDP helper, it must be enabled globally with the ip helper
u
command. The UDP destination ports for which broadcast traffic will be
forwarded must be specified with the
command. And the remote servers which are configured to service UDP
clients on another network segment specified with the
address command.
– 1128 –
port 138
port 137
port 37
port 49
port 69
ip forward-protocol udp
ip helper-