HP 2500 manual Reply, Address received via Dhcp or Bootp, Process immediately

IP Addressing,	Access, and
Configuring	Interface

Configuring IP Addressing, Interface Access, and System Information

IP Configuration

1. DHCP/Bootp requests are automatically broadcast on the local network. (The switch sends one type of request to which either a DHCP or Bootp server can respond.)

2. When a DHCP or Bootp server receives the request, it replies with a

	previously configured IP address and subnet mask for the switch. The
	switch also receives an IP Gateway address if the server has been config-
	ured to provide one. In the case of Bootp, the server must first be
	configured with an entry that has the MAC address of the switch. (To
	determine the switch’s MAC address, see appendix B, “MAC Address
	Management”. The switch properly handles replies from either type of
	server. If multiple replies are returned, the switch tries to use the first
	reply.)
N o t e	If you manually configure a gateway on the switch, it will ignore any gateway
	address received via DHCP or Bootp.
	If the switch is initially configured for DHCP/Bootp operation (the default),
	or if it is rebooted with this configuration, it immediately begins sending
	request packets on the network. If the switch does not receive a reply to its
	DHCP/Bootp requests, it continues to periodically send request packets, but
	with decreasing frequency. Thus, if a DHCP or Bootp server is not available
	or accessible to the switch when DHCP/Bootp is first configured, the switch
	may not immediately receive the desired configuration. After verifying that
	the server has become accessible to the switch, reboot the switch to re-start
	the process immediately.

DHCP Operation. A significant difference between a DHCP configuration and a Bootp configuration is that an IP address assignment from a DHCP server is automatic. Depending on how the DHCP server is configured, the switch may receive an ip address that is temporarily leased. Periodically the switch may be required to renew its lease of the IP configuration. Thus, the IP addressing provided by the server may be different each time the switch reboots or renews its configuration from the server. However, you can fix the address assignment for the switch by doing either of the following:

■Configure the server to issue an “infinite” lease.

■Using the switch’s MAC address as an identifier, configure the server with a “Reservation” so that it will always assign the same IP address to the switch. (For MAC address information, refer to appendix B, “MAC Address Management”.)

For more information on either of these procedures, refer to the documenta- tion provided with the DHCP server.

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