Lease time specifies the amount of time that the client can use the IP address assigned by the server.
Perform the following:
iS5comm(config)# ip dhcp pool 1
A pool number is entered. The range is from 1 to 2147483647.
iS5comm(dhcp-config)# lease 1 2 30
Global Options
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Code : 3, Value : 12.0.0.2
Pool Id : 1
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Subnet : 12.0.0.0
Subnet Mask : 255.0.0.0
Lease time : 95400 secs
Utilization threshold : 50%
Start Ip : 12.0.0.1
End Ip : 12.0.0.100