Routing Commands
255
ProSafe Managed Switch
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.
Format clear ip helper statistics
Mode
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 can 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.
Ip-address: Destination broadcast 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.
Term Definition
Maximum Hop
Count
The maximum allowable relay agent hops.
Minimum Wait
Time (Seconds)
The minimum wait time.
Admin Mode
Indicates whether relaying of requests is enabled or disabled.
Server IP
Address
The IP address for the BootP/DHCP Relay server.
Circuit Id
Option Mode
The DHCP circuit Id option which may be enabled or disabled.
Requests
Received
The number or requests received.
Requests
Relayed
The number of requests relayed.
Packets
Discarded
The number of packets discarded.
Privileged EXEC
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