Patton electronic SmartNode 4110 Series ユーザーズマニュアル

DHCP-server configuration tasks

SmartWare Software Configuration Guide 

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

[name](cfg) #[no] profile dhcp-
relay name

Enter dhcp-relay profile mode. A new profile is created if 
none with the given name exists.

[name] (pf-dhcpr)[name]#destina-
tion <ip-address> 
or 
[name] (pf-dhcpr)[name]#destina-
tion after <index> <ip-address> 
or 
[name] (pf-dhcpr)[name]#destina-
tion before <index> <ip-address> 
or 
[name] (pf-dhcpr)[name]#no desti-
nation <index> 

Add or remove an IP-Address to the profile. The IP-
Address can be any kind of address, means uni-, mulit-, or 
broadcast. Be aware that every DHCP- Request will be 
relayed to all ip- addresses in the list in the order they 
are listed. The DHCP-Relay profile is only valid if it con-
tains at least one destination IP. The maximum amount of 
destinations is limited to 16. 

Sets the max-hops a packet may have passed so far. 
When a packet exceeds the max-hops limit, it is silently 
discarded.  
Max-hops is by default set to 4. This is an optional config-
uration command. 

[name] (pf-dhcpr)[name]#traffic-
class <traffic-class> 

Sets traffic class for DHCP packets. The traffic class may 
be new or may already exist. This is an optional configu-
ration command.