Verifying how IP preserve was implemented in a switch
After the switch reboots, enter the
show run
command. The example below shows all the configurations settings that 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.
If a switch received its IPv6 address from a DHCP server, the "ip address" field under "vlan 1" would display
dhcp–bootp
.
Configuration file with dedicated IP addressing
Switch(config)# show run Running configuration: ; J8715A Configuration Editor; Created on release #xx.14.01 hostname "Switch" module 1 type J8702A module 2 type J8705A trunk 11–12 Trk1 Trunk ipv6 default–gateway 2001:db8:0:7::5 snmp–server community "public" Unrestricted vlan 1 name "DEFAULT_VLAN" untagged 1–10,13–24,1–24,Trk1 ipv6 address 2001:db8::214:c2ff:fe4c:e480 exit spanning–tree Trk1 priority 4 password manager password operator
Because the switch’s IPv6 address and default gateway were statically configured (not assigned by a DHCP server), when the switch boots up with the IP Preserve startup configuration file (see Configuring IP preserve ), its current IPv6 address, subnet mask, and default gateway are not changed.
If a switch’s current IP address was acquired from a DHCP/Bootp server, the IP Preserve statement is ignored and the IP addresses in the downloaded configuration file are implemented.
For more information on how to use the IP preserve feature, see the current ArubaOS-Switch Basic Operation Guide.