text: Verify, release, or renew a client address lease: Dynamic Host Configuration Protocol (DHCP)
  TechNet Library TechNet Archive Windows Server 2003 Product Help Windows Server 2003 Product Help Network Services Managing Core Network Services DHCP DHCP How To... Manage Clients and Leases View client lease information Delete a client lease Verify, release, or renew a client address lease Set DHCP class ID information at a client computer Show DHCP class ID information at a client computer Collapse the table of content
  To verify, release, or renew a client address lease
  At a DHCP-enabled client computer running Windows XP or a member of Windows Server 2003 family, open a Command Prompt.
  Use the Ipconfig command-line utility to verify, release, or renew the lease of the client with a DHCP server, as follows: To verify a DHCP client lease, type ipconfig to view lease-status information. Or, type ipconfig /all.