ExtremeXOS has DHCP (Dynamic Host Configuration Protocol) support.
In simple terms, a DHCP server dynamically manages and allocates IP addresses to clients. When a client accesses the network, the DHCP server provides an IP address to that client. The client is not required to receive the same IP address each time it accesses the network. A DHCP server with limited configuration capabilities is included in the switch to provide IP addresses to clients.
After ExtremeXOS DHCP server assigns the IP addresses to the clients, the entry is not removed until a DHCP release is received by the client. After the lease timer expires, the entry appears in the expired state. If the DHCP server enabled port goes down or the DHCP server is disabled on the port, the entries are not removed from the DHCP server table. Also, if the client computer moved to another VLAN, the entries are not removed until the lease timer expires.
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Download EPUBSlot-1 Stack.32 # show dhcp-server
VLAN "v1":
DHCP Address Range : 1.1.1.100->1.1.1.200
Netlogin Lease Timer : Not configured (Default = 10 seconds)
DHCP Lease Timer : 100 seconds
Default Gateway : 1.1.1.1
Primary DNS Server : 12.1.2.1
Ports DHCP Enabled : 2:24
===========================================================================
IP MAC State Lease Time Left
===========================================================================
1.1.1.100 00:0c:29:11:e2:c1 Assigned 0000:01:14
1.1.1.101 00:0c:29:11:e2:a3 Assigned 0000:01:08
1.1.1.102 00:0c:29:11:e2:ad Assigned 0000:01:14
1.1.1.103 00:0c:29:11:e2:b7 Assigned 0000:01:21
Slot-1 Stack.32 # disable ports 2:24
Slot-1 Stack.33 # show dhcp-server
VLAN "v1":
DHCP Address Range : 1.1.1.100->1.1.1.200
Netlogin Lease Timer : Not configured (Default = 10 seconds)
DHCP Lease Timer : 100 seconds
Default Gateway : 1.1.1.1
Primary DNS Server : 12.1.2.1
Ports DHCP Enabled : 2:24
===========================================================================
IP MAC State Lease Time Left
===========================================================================
1.1.1.100 00:0c:29:11:e2:c1 Assigned 0000:01:06
1.1.1.101 00:0c:29:11:e2:a3 Assigned 0000:01:00
1.1.1.102 00:0c:29:11:e2:ad Assigned 0000:01:06
1.1.1.103 00:0c:29:11:e2:b7 Assigned 0000:01:13
Slot-1 Stack.34 # show dhcp-server
VLAN "v1":
DHCP Address Range : 1.1.1.100->1.1.1.200
Netlogin Lease Timer : Not configured (Default = 10 seconds)
DHCP Lease Timer : 100 seconds
Default Gateway : 1.1.1.1
Primary DNS Server : 12.1.2.1
Ports DHCP Enabled : 2:24
===========================================================================
IP MAC State Lease Time Left
===========================================================================
1.1.1.100 00:0c:29:11:e2:c1 Expired 0000:00:00
1.1.1.101 00:0c:29:11:e2:a3 Expired 0000:00:00
1.1.1.102 00:0c:29:11:e2:ad Expired 0000:00:00
1.1.1.103 00:0c:29:11:e2:b7 Expired 0000:00:00
The entries can be cleared by using the command: clear vlan v1 dhcp-address-allocation all