HP 2520-8

2-25
IPv6 Management Features
IP Preserve for IPv6
To download an IP Preserve configuration file to an IPv6-based switch, enter
the TFTP copy command as described in “TFTP File Transfers over IPv6” on
page 2-14 to copy the file as the new startup-config file on a switch.
When you download an IP Preserve configuration file, the following rules
apply:
■ If the switch’s current IPv6 address for VLAN 1 was statically configured
and not dynamically assigned by a DHCP/Bootp server, the switch reboots
and retains its current IPv6 address, subnet mask, and gateway address.
All other configuration settings in the downloaded configuration file are
applied.
■ If the switch’s current IPv6 address for VLAN 1 was assigned from a DHCP
server and not statically configured, IP Preserve is suspended. The IPv6
addressing specified in the downloaded configuration file is implemented
when the switch copies the file and reboots.
• If the downloaded file specifies DHCP/Bootp as the source for the
IPv6 address of VLAN 1, the switch uses the IPv6 address assigned by
the DHCP/Bootp server.
• If the file specifies a dedicated IPv6 address and subnet mask for
VLAN 1 and a Gateway IPv6 address, the switch implements these
settings in the startup-config file.
To verify how IP Preserve was implemented in a switch, after the switch
reboots, enter the show run command. Figure 2-11 shows an example in which
all configurations settings have been copied into the startup-config file except
for the IPv6 address of VLAN 1 (2001:db8::214:c2ff:fe4c:e480) and the default
IPv6 gateway (2001:db8:0:7::5), which were retained.
Note that if a switch received its IPv6 address from a DHCP server, the “ip
address” field under “vlan 1” would display: dhcp-bootp.