Kofax Communication Server 9.1.1 - Manual (Page 59)

Environment Guide Version 3.00.04
© Copyright Kofax, Inc. All information is subject to change without notice. 59
Having received the IPv6 address prefix from the router, IPv6 host generates its interface identifier in order
to generate the full IPv 6 address. Usually the interface identifier would be based on the network interface‟s
MAC address (using so called EUI-64 address format which maps the 48-bit MAC address into 64-bit
interface identifier), but there is also a possibility that the host would use randomly generated permanent
interface identifier in order to mitigate address scans of unicast IPv6 addresses on a subnet.
By default, Windows Server 2008 and Windows 7 use the randomized approach, but it can be disabled by
the following netsh command:
Netsh interface ipv6 set global randomizeidentifiers=disabled
Having executed this command, Windows Server 2008 and Windows 7 would generate interface identifier
based on the interface‟s MAC address.
6.3 Example: Setting Up IPv6 Cisco Router
Assume a subnet with a Cisco router 28xx with IOS version 12.4T(22) or later which
is configured to advertise IPv6 prefix FD96:EB5F:7508:5760::/64 over its interface
GigabitEthernet 0/1:
! Global settings
Ipv6 unicast-routing
! Interface related settings
interface GigabitEthernet0/1
no ip address
duplex auto
speed auto
ipv6 address FD96:EB5F:7508:5760::/64 eui-64
Each Windows Server 2008 or Windows 7 IPv6 host (on both of these operating systems IPv6 is enabled
for auto-configuration by default) connected to the same subnet will be assigned the IPv6 address with this
prefix.
If the calculation of the interface identifier based on the MAC address has been enforced by the
corresponding netsh command, the inspection of the assigned IPv6 address on the corresponding interface
through ipconfig /all command will show the following: