Routing Commands
210
ProSAFE M7100 Managed Switches
IP Helper Commands
This section describes the commands to configure a DHCP relay agent with multiple DHCP server
addresses per routing interface, and to use different server addresses for client packets arriving
on different interfaces on the relay agent.
clear ip helper statistics
Use this command to reset the statistics displayed in the show ip helper statistics
command to zero.
ip helper-address (Global Config)
Use the Global Configuration ip helper-address command to have the switch forward User
Datagram Protocol (UDP) broadcasts received on an interface. To disable the forwarding of
broadcast packets to specific addresses, use the no form of this command.
The ip helper-address command forwards specific UDP broadcast from one interface to another.
You c
an define many helper addresses but the total number of address-port pairs is limited to
128 for the whole device. The setting of a helper address for a specific interface has precedence
over a setting of a helper address for all interfaces.
• The ip-addres
s is the destination broadcast address or host address to be used when
forwarding UDP broadcasts. You can specify 0.0.0.0 to indicate not to forward the UDP
packet to any host and use
"255.255.255.255" to broadcast the UDP packets to all hosts on
the target subnet.
• The udp-port-lis
t is the broadcast packet destination UDP port number to forward. If not
specified, packets for the default services are forwarded to the helper address. Valid range,
0-65535.
Circuit Id Option
Mode
The DHCP circuit Id option which might be enabled or disabled.
Requests
Rec
eived
The number or requests received.
Requests Relayed The number of requests relayed.
Packets
Disc
ar
ded
The number of packets discarded.
Format clear ip helper statistics
Mode Privileged EXEC
Term Definition
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