How to View, Modify, and Reclaim DHCP IP Pools and Configure Management Addresses on a Layer 2 Switch

The following instructions show how to manage DHCP address pools and configure a management IP address on a layer‑2 switch using the command‑line interface.

1. View the details of an IP pool named pool1 :

display ip pool name pool1
Pool-name      : pool1
Pool-No        : 2
Lease          : 3 Days 0 Hours 0 Minutes   // lease period 3 days
Domain-name    : -
DNS-server0    : 10.10.10.5
DNS-server1    : 10.10.10.6
NBNS-server0   : 20.20.20.5
Netbios-type   : -
Position       : Local   Status           : Unlocked
Gateway-0      : 10.10.10.10
Mask           : 255.255.255.0
VPN instance   : --
---
Start          End          Total  Used  Idle(Expired)  Conflict  Disable
10.10.10.1    10.10.10.254  253    0     253(0)          0        0

2. Modify the DHCP lease time using the interface method (example for VLANIF100):

[swt] interface vlanif 100
[swt-Vlanif100] ip address 10.10.10.10 24
[swt-Vlanif100] dhcp select interface
[swt-Vlanif100] dhcp server lease day 2 hour 2 minute 30

3. Modify the DHCP lease time using the global method (example for pool global1 ):

[swt] ip pool global1
[swt-ip-pool-global1] lease day 2 hour 2 minute 30

4. Reclaim (release) IP addresses from a DHCP pool:

• Using a global address pool:

<swt> reset ip pool name pool1
[swt] ip pool pool1
[swt-ip-pool-pool1] undo static-bind ip-address 10.1.1.5   // remove static bind

• Using an interface address pool:

<swt> reset ip pool interface vlanif100 10.1.1.5   // release IP
[swt] interface vlanif 100
[swt-Vlanif100] undo dhcp server static-bind ip-address 10.1.1.5   // remove static bind

5. Configure a management IP address on the switch by assigning an address to a VLAN interface:

[swt] interface Vlanif 1   // enter VLANIF 1 view
[swt-Vlanif1] ip address 100.1.1.1 24   // set management address

These commands allow administrators to inspect, adjust, and clean up DHCP pools as well as set up a reachable management address on a layer‑2 switch.