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Configuring DHCP Relay
DHCP Relay Implementation
OmniSwitch AOS Release 6 Network Configuration Guide
September 2009
page 31-11
Setting Maximum Hops
This value specifies the maximum number of relays the BOOTP/DHCP packet can go through until it 
reaches its server destination. This limit keeps packets from “looping” through the network. If a UDP 
packet contains a hop count equal to the hops value, DHCP Relay discards the packet. The following 
syntax is used to set a maximum of four hops:
-> ip helper maximum hops 4
The hops value represents the maximum number of relays. The range is from one to 16 hops. The default 
maximum hops value is set to four. This maximum hops value only applies to DHCP Relay. All other 
switch services will ignore this value. 
Setting the Relay Forwarding Option
This value specifies if DHCP Relay should operate in a Standard, AVLAN, or Per-VLAN only forward-
ing mode. If the AVLAN only option is selected, only DHCP packets received on authenticated ports are 
processed. By default, the forwarding option is set to standard. To change the forwarding option value, 
enter ip helper followed by standardavlan only, or per-vlan only. For example:
-> ip helper avlan only
-> ip helper standard
-> ip helper per-vlan only