Patton electronic SmartNode 4110 Series Configure DHCP-relay, Create/Modify DHCP-Relay profile

SmartWare Software Configuration Guide 27 • DHCP configuration

Configure DHCP-relay

SmartNodes support the DHCP-Relay functionality. To avoid having a DHCP-Server in every subnet, Smart- Nodes now can forward DHCP-Requests either directly to a DHCP-Server or to another DHCP-Relay. To configure the relay, there is a profile type dhcp-relay.The minimum configuration of such a profile only needs one IP where DHCP-Requests are sent to. Note that a SmartNode can be configured either as DHCP-Server or as DHCP-Relay, but not both in parallel.

Create/Modify DHCP-Relay profile

To use a SmartNode as DHCP-Relay Agent, a dhcp-relay profile must be created. Some things you should know about the Relay Agent profile:

•In order to create valid profile, a dhcp-relay profile must contain at least one destination IP.

•There is no limit of dhcp-relay profiles, but there is only one active profile at the time.

•Modification of the dhcp-relay profile currently in use can be made anytime. Changes are activated imme- diately. When all destination IPs are removed the profile is considered invalid and the DHCP-Relay is shut down.

Mode: Configure

Step	Command	Purpose
1	[name](cfg) #[no] profile dhcp-	Enter dhcp-relay profile mode. A new profile is created if
	relay name	none with the given name exists.
2	[name] (pf-dhcpr)[name]#destina-	Add or remove an IP-Address to the profile. The IP-
	tion <ip-address>	Address can be any kind of address, means uni-, mulit-, or
	or	broadcast. Be aware that every DHCP- Request will be
	[name] (pf-dhcpr)[name]#destina-	relayed to all ip- addresses in the list in the order they
	tion after <index> <ip-address>	are listed. The DHCP-Relay profile is only valid if it con-
	or	tains at least one destination IP. The maximum amount of
	[name] (pf-dhcpr)[name]#destina-	destinations is limited to 16.
	tion before <index> <ip-address>
	or
	[name] (pf-dhcpr)[name]#no desti-
	nation <index>
3	[name] (pf-dhcpr)[name]#max-	Sets the max-hops a packet may have passed so far.
	hops <1...16>	When a packet exceeds the max-hops limit, it is silently
	or	discarded.
	[name] (pf-dhcpr)[name]#no max-	Max-hops is by default set to 4. This is an optional config-
	hops	uration command.
4	[name] (pf-dhcpr)[name]#traffic-	Sets traffic class for DHCP packets. The traffic class may
	class <traffic-class>	be new or may already exist. This is an optional configu-
		ration command.

DHCP-server configuration tasks 302