HP ProCurve 2500 For example, consider Figure 60:, Figure 60. Example of IP Preserve Operation

Enhancements in Release F.04.08

IP Preserve: Retaining VLAN-1 IP Addressing Across Configuration File Downloads

For example, consider Figure 60:

		TFTP				DHCP
	Server					Server
			Management
config.txt					IP Address
				Station
					to VLAN 1

Switch 1	Switch 2	Switch 3	Switch 4
VLAN 1: 10.31.22.101	VLAN 1: 10.31.22.102	VLAN 1: 10.31.22.103	VLAN 1: DHCP
(Manually configured)	(Manually configured)	(Manually configured)

Switches 1 through 3 copy and implement the config.txt file from the TFTP server (figure 61), but retain their current IP addresses.

Switch 4 also copies and implements the config.txt file from the TFTP server (figure 61), but acquires new IP addressing from the DHCP server.

Figure 60. Example of IP Preserve Operation

If you apply the following configuration file to Figure 60, switches 1 - 3 will retain their manually assigned IP addressing and switch 4 will be configured to acquire its IP addressing from a DHCP server.

	Using figure 60, above, switches 1 - 3 ignore these entries
	because the file implements IP Preserve and their current
	IP addressing was not acquired through DHCP/Bootp.
	Switch 4 ignores IP Preserve and implements the DHCP/
	Bootp addressing and IP Gateway specified in this file
	(because its last IP addressing was acquired from a
IP Preserve Command
	DHCP/Bootp server).

Figure 61. Configuration File in TFTP Server, with DHCP/Bootp Specified as the IP Addressing Source

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