Reference Guide

Parameter Description
interface The relay configuration is applied to packets that arrive on this interface. This field is set to
any for global IP helper entries.
UDP Port The relay configuration is applied to packets whose destination UDP port is this port. Entries
whose UDP port is identified as any are applied to packets with the destination UDP ports
listed in Table 4.
Discard If Yes, packets arriving on the given interface with the given destination UDP port are
discarded rather than relayed. Discard entries are used to override global IP helper address
entries which otherwise might apply to a packet.
Hit Count The number of times the IP helper entry has been used to relay or discard a packet.
Server
Address
The IPv4 address of the server to which packets are relayed.
The following example shows CLI display output for the command.
(Extreme 220) #show ip helper-address
IP helper is enabled
Interface UDP Port Discard Hit Count Server Address
--------------- ----------- -------- ---------- ---------------
1/0/1 dhcp No 10 10.100.1.254
10.100.2.254
1/0/17 any Yes 2
any dhcp No 0 10.200.1.254
show ip helper statistics
Use this command to display the number of DHCP
and other UDP packets processed and relayed by the
UDP relay agent.
Format
show ip helper statistics
Mode Privileged EXEC
Parameter Description
DHCP client
messages
received
The number of valid messages received from a DHCP client. The count is only incremented if
IP helper is enabled globally, the ingress routing interface is up, and the packet passes a
number of validity checks, such as having a TTL>1 and having valid source and destination IP
addresses.
DHCP client
messages
relayed
The number of DHCP client messages relayed to a server. If a message is relayed to multiple
servers, the count is incremented once for each server.
DHCP server
messages
received
The number of DHCP responses received from the DHCP server. This count only includes
messages that the DHCP server unicasts to the relay agent for relay to the client.
DHCP server
messages
relayed
The number of DHCP server messages relayed to a client.
Routing Commands
ExtremeSwitching 200 Series: Command Reference Guide for version 01 .02.04.0007 563