Here is a step-by-step procedure to configure the DHCP server with a VLAN in the EXOS switch.
Step 1. Create and configure a VLAN with IP address and Ports
create vlan vlan_name
configure vlan vlan_name ipaddress address/mask
exos-switch# create vlan DHCP_Server
exos-switch# configure vlan DHCP_Server ipaddress 192.168.100.1/24
IP interface for VLAN DHCP_Server has been created.
exos-switch# configure vlan DHCP_Server add ports 1-10
Port 1 2 3 4 5 6 7 8 9 10 untagged has been auto-moved from VLAN "Default" to "DHCP_Server".
Step 2. Enable DHCP client ports with the VLAN
enable dhcp ports port_list vlan vlan_name
exos-switch# enable dhcp ports 1-10 vlan DHCP_Server
Step 3. Configure DHCP address range with the VLAN
configure vlan vlan_name dhcp-address-range start_addr - end_addr
exos-switch# configure vlan DHCP_Server dhcp-address-range 192.168.100.10 - 192.168.100.200
Step 4. Configure DHCP options with the VLAN
configure vlan vlan_name dhcp-options default-gateway gateway_addr
configure vlan vlan_name dhcp-options dns-server dns_addr
exos-switch# configure vlan DHCP_Server dhcp-options default-gateway 192.168.100.1
exos-switch# configure vlan DHCP_Server dhcp-options dns-server primary 1.1.1.1
exos-switch# configure vlan DHCP_Server dhcp-options dns-server secondary 8.8.8.8
Step 5. Check the DHCP configuration
exos-switch# show dhcp-server
VLAN "DHCP_Server":
DHCP Address Range : 192.168.100.10->192.168.100.200
Netlogin Lease Timer : Not configured (Default = 10 seconds)
DHCP Lease Timer : Not configured (Default = 7200 seconds)
Default Gateway : 192.168.100.1
Primary DNS Server : 1.1.1.1
Secondary DNS Server : 8.8.8.8
Ports DHCP Enabled : 1-10
Step 6. (Optional) Configure the DHCP lease timer
The DHCP lease timer can be changed as follows. This example shows a change from the default 2 hours to 8 hours.
exos-switch# configure vlan DHCP_Server dhcp-lease-timer 28800
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