= Configuring the NEC Switch =
Although configuring the NEC switch is pretty intuitive if you have worked with Cisco switches, some aspects of configuring them might require digging through the Japanese manuals to find. 
 
== Overview ==
All configuration steps assume privileged mode. [[BR]]
The configuration for the following topics are covered here:

 * Undoing configurations 
 * DHCP/BootP relay agent/IP helper

== Undoing Configurations ==
Most of the time, just adding the command `no` to the beginning of what you see when you do the command `show configuration` will suffice for undoing configurations, but occasionally you get something like this:
{{{
(config)# no vlan 4
vlan : Can't delete this configuration referred by other configuration.
}}}
This happens when the configs for an interface that you are trying to delete are associated with something else; you need to undo any configurations associated with an interface before you can delete it. In this particular case, VLAN 4 is associated with port 0/27, and you need to undo the configurations to port 0/27 that have to do with vlan 4 before you can get rid of it. 
{{{
!(config)# int gi 0/27
!(config-if)# sh
interface gigabitethernet 0/27
  switchport mode access
  switchport access vlan 4
!
!(config-if)# no sw acc vlan 4
!(config-if)# exit
!(config)# no vlan 4
!(config)# save
}}}

== DHCP/BootP relay agent/IP helper (6/28) ==
This is a translation from the online NEC guide. 

1. set up VLAN and associated port. Assign static IP address to port. This is the vlan on which the DHCP clients live.
{{{
(config)# vlan 2
(config-vlan)# exit
(config)# interface gigabitethernet 0/5
(config-if)# switchport mode access
(config-if)# switchport access vlan 2
(config-if)# exit
(config)# interface vlan 2
(config-if)# ip address 10.1.0.1 255.255.0.0
(config-if)# exit
}}}　

2. Next, set up the VLAN and interface connected to the DHCP server. 
{{{
(config)# vlan 3
(config-vlan)# exit
(config)# interface gigabitethernet 0/7
(config-if)# switchport mode access
(config-if)# switchport access vlan 3
(config-if)# exit
(config)# interface vlan 3
(config-if)# ip address 20.1.0.1 255.255.0.0
(config-if)# exit
}}}　

3. set the DHCP server's address as the helper address. 
{{{
(config)# interface vlan 2
(config-if)# ip helper-address 20.1.0.10
(config-if)# exit
}}}