Kofax Communication Server 9.1.1 User Manual

Page 64

Environment Guide

Version 3.00.04

1. In order to send a packet to the LS1, KCS core has to send it to its IPv

6 “proxy address” FD96::1 (the

IPv6 network must take care that this packet would be routed to the appropriate NAT-

PT router‟s

interface)

The router recognizes the prefix fd96::/96 in the packet‟s destination address and executes the NAT-PT

translation for this packet (due to NAT-PT prefix configuration)

3. Based on the IPv4 and IPv6 source mapping configuration, it replaces the destination IPv6 address

fd96::1 by the 172.20.148.6 and the source address

fd96:eb5f:7508:5760:204:23ff:feac:4172 by its IPv

4 “proxy address” 172.20.148.53

4. The packet is delivered to the IPv4 address 172.20.148.6

Overview:

IPV6

Network

LS1

IPV4

KCSCore

IPV6

IPV4

Network

NAT-PT

Translation

172.20.148.6

fd96:eb5f:7508:5760:204:23ff:feac:4172

NAT-PT prefix: fd96::/96

IPV6 source mapping:

fd96:eb5f:7508:5760:204:23ff:feac:4172 -> 172.20.148.53

IPV4 source mapping:

172.20.148.6 -> fd96::1

KCSCore sends IPV6 packet to LS1

Source:

fd96:eb5f:7508:5760:204:23ff:feac:4172

Destination:fd96::1

NAT-PT translation on the router

Source:

172.20.148.53 <- fd96:eb5f:7508:5760:204:23ff:feac:4172

Destination:172.20.148.6 <- fd96::1

LS1 receives IPV4 packet from KCSCore

Source:

172.20.148.53

Destination:172.20.148.6

KCSCore receives IPV6 packet from LS1

Source:

fd96::1

Destination:fd96:eb5f:7508:5760:204:23ff:feac:4172

NAT-PT translation on the router

Source:

172.20.148.6 -> fd96::1

Destination:172.20.148.53 -> fd96:eb5f:7508:5760:204:23ff:feac:4172

LS1 sends IPV4 packet to KCSCore

Source:

172.20.148.6

Destination:172.20.148.53

Corresponding Cisco router 28xx configuration using static NAT-PT:

Static NAT-PT mapping is quite simple and understandable, but requires one configuration line per IPv6 or

IPv4 host which should be involved in the NAT-PT translation
(see ipv6 nat v4v6 … and ipv6 nat v6v4 … lines below):

! Global settings
!
Ipv6 unicast-routing
no ipv6 cef
!
! Interface related settings
!
! IPv4 interface
interface GigabitEthernet0/0
ip address 172.20.148.35 255.255.255.0
duplex auto
speed auto
ipv6 nat
!
! IPv6 interface
interface GigabitEthernet0/1
no ip address
duplex auto
speed auto
ipv6 address FD96:EB5F:7508:5760::/64 eui-64
ipv6 nat
no ipv6 redirects
!
! NAT-PT configuration
ipv6 nat v4v6 source 172.20.148.6 FD96::1