HP PROCURVE 2520 Management And Configuration Manual page 182

Configuring IP Addressing
IP Preserve: Retaining VLAN-1 IP Addressing Across Configuration File Downloads
ProCurve(config)# show run
Running configuration:
; J9137A Configuration Editor; Created on release #S.14.XX
hostname "ProCurve"
trunk A11-A12 Trk1 Trunk
ip default-gateway 10.10.10.1
snmp-server community "public" Unrestricted
vlan 1
name "DEFAULT_VLAN"
untagged A1-A10,A13-A24,B1-B24,Trk1
ip address dhcp-bootp
exit
spanning-tree Trk1 priority 4
password manager
password operator
Figure 8-8. Configuration File in TFTP Server, with DHCP/Bootp Specified as the IP Addressing Source
If you apply this configuration file to figure 8-7, switches 1 - 3 will still retain
their manually assigned IP addressing. However, switch 4 will be configured
with the IP addressing included in the file.
8-18
Using figure 8-7, 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 DHCP/Bootp server).