Contents

Introduction· 1

Prerequisites· 1

Example: Configuring an ISATAP tunnel and a 6to4 tunnel 1

Network configuration· 1

Applicable hardware and software versions· 2

Procedures· 2

Configuring Device A· 2

Configuring Device B· 3

Configuring the ISATAP host 4

Verifying the configuration· 4

Configuration files· 5

 

Introduction

This document provides examples for configuring an ISATAP tunnel and a 6to4 tunnel.

Prerequisites

The configuration examples in this document were created and verified in a lab environment, and all the devices were started with the factory default configuration. When you are working on a live network, make sure you understand the potential impact of every command on your network.

This document assumes that you have basic knowledge of ISATAP tunneling and 6to4 tunneling.

Example: Configuring an ISATAP tunnel and a 6to4 tunnel

Network configuration

As shown in Figure 1, configure a 6to4 tunnel between Device A and Device B to allow communications between the headquarters and the branches over the IPv4 network.

Configure an ISATAP tunnel between Device A and the ISATAP host to allow the host in the IPv4 network to access the headquarters.

Figure 1 Network diagram

 

Table 1 Interface and IP address assignment

Device	Interface	IP address	Device	Interface	IP address
Device A	Vlan-int10	2.1.1.1/24	Device B	Vlan-int10	3.1.1.1/24
	Vlan-int20	2002:0201:0101:1::1/64		Vlan-int20	2002:0301:0101:1::1/64
	Vlan-int30	2002:0201:0101:2::1/64		Vlan-int30	2002:0301:0101:2::1/64
	Tunnel 1	3001::1/64		Tunnel 1	3001::2/64
	Tunnel 2	2001::5EFE:0201:0101/64

 

Applicable hardware and software versions

The following matrix shows the hardware and software versions to which this configuration example is applicable:

 

Hardware	Software version
S12500G-AF	Release 8053P05 and later
S12500CR	Release 8053P05 and later
S10500X-G	Release 7753P05 and later
S7500X-G	Release 7753P05 and later

 

Procedures

Make sure Device A and Device B can reach each other through IPv4.

Configuring Device A

# Configure an IP address for VLAN-interface 10.

<DeviceA> system-view

[DeviceA] vlan 10

[DeviceA-vlan10] port Ten-GigabitEthernet 3/0/1

[DeviceA-vlan10] quit

[DeviceA] interface vlan-interface 10

[DeviceA-Vlan-interface10] ip address 2.1.1.1 24

[DeviceA-Vlan-interface10] quit

# Configure IP addresses for other interfaces as shown in Table 1. (Details not shown.)

# Create a 6to4 tunnel interface Tunnel 1.

[DeviceA] interface tunnel 1 mode ipv6-ipv4 6to4

# Specify an IPv6 address for the tunnel interface.

[DeviceA-Tunnel1] ipv6 address 3001::1/64

# Specify the source interface as VLAN-interface 10 for the tunnel interface.

[DeviceA-Tunnel1] source vlan-interface 10

[DeviceA-Tunnel1] quit

# Configure a static route destined for 2002:0301:0101::/48 through the tunnel interface.

[DeviceA] ipv6 route-static 2002:0301:0101:: 48 tunnel 1

# Create an ISATAP tunnel interface Tunnel 2.

[DeviceA] interface tunnel 2 mode ipv6-ipv4 isatap

# Specify an IPv6 address for the tunnel interface.

[DeviceA-Tunnel2] ipv6 address 2001::5EFE:0201:0101 64

# Specify the source interface as VLAN-interface 10 for the tunnel interface.

[DeviceA-Tunnel2] source  vlan-interface 10

[DeviceA-Tunnel2] quit

# Configure a static route destined for 2001::/16 through the tunnel interface.

[DeviceA] ipv6 route-static 2001:: 16 tunnel 2

# Disable RA suppression.

[DeviceA] interface Tunnel 2

[DeviceA-Tunnel2] undo ipv6 nd ra halt

[DeviceA-Tunnel2] quit

[DeviceA] interface vlan-interface 20

[DeviceA-Vlan-interface20] undo ipv6 nd ra halt

[DeviceA-Vlan-interface20] quit

[DeviceA] interface  vlan-interface 30

[DeviceA-Vlan-interface30] undo ipv6 nd ra halt

[DeviceA-Vlan-interface30] quit

Configuring Device B

# Configure an IP address for VLAN-interface 10.

<DeviceB> system-view

[DeviceB] vlan 10

[DeviceB-vlan10] port Ten-GigabitEthernet 3/0/1

[DeviceB-vlan10] quit

[DeviceB] interface  vlan-interface 10

[DeviceB-Vlan-interface10] ip address 3.1.1.1 24

[DeviceB-Vlan-interface10] quit

# Configure IP addresses for other interfaces as shown in Table 1. (Details not shown.)

# Create a 6to4 tunnel interface Tunnel 1.

[DeviceB] interface tunnel 1 mode ipv6-ipv4 6to4

# Specify an IPv6 address for the tunnel interface.

[DeviceB-Tunnel1] ipv6 address 3001::2/64

# Specify the source interface as VLAN-interface 10 for the tunnel interface.

[DeviceB-Tunnel1] source vlan-interface 10

[DeviceB-Tunnel1] quit

# Configure a static route destined for 2002:0201:0101::/48 through the tunnel interface.

[DeviceB] ipv6 route-static 2002:0201:0101:: 48 tunnel 1

# Disable RA suppression.

[DeviceB] interface vlan-interface 20

[DeviceB-Vlan-interface20] undo ipv6 nd ra halt

[DeviceB-Vlan-interface20] quit

[DeviceB] interface vlan-interface 30

[DeviceB-Vlan-interface30] undo ipv6 nd ra halt

[DeviceB-Vlan-interface30] quit

Configuring the ISATAP host

Configurations on the ISATAP host vary by operating system. The following example is performed on Windows XP.

# Install IPv6.

C:\>ipv6 install

# Configure an ISATAP tunnel.

C:\>netsh interface ipv6 isatap set router 2.1.1.1

# Display information about the ISATAP tunnel interface.

C:\>ipv6 if 2

Interface 2: Automatic Tunneling Pseudo-Interface

  Guid {48FCE3FC-EC30-E50E-F1A7-71172AEEE3AE}

  does not use Neighbor Discovery

  uses Router Discovery

  routing preference 1

  EUI-64 embedded IPv4 address: 1.1.1.2

  router link-layer address: 2.1.1.1

    preferred global 2001::5efe:1.1.1.2, life 29d23h59m46s/6d23h59m46s (public)

    preferred link-local fe80::5efe:1.1.1.2, life infinite

  link MTU 1500 (true link MTU 65515)

  current hop limit 255

  reachable time 42500ms (base 30000ms)

  retransmission interval 1000ms

  DAD transmits 0

  default site prefix length 48

The host has acquired the prefix 2001::/64 and has automatically generated the global unicast address 2001::5efe:1.1.1.2. The message "uses Router Discovery" indicates that the router discovery function is enabled on the host.

# Display information about IPv6 routes on the host.

C:\>ipv6 rt

2001::/64 -> 2 pref 1if+8=9 life 29d23h59m43s (autoconf)

::/0 -> 2/fe80::5efe:1.1.1.1 pref 1if+256=257 life 29m43s (autoconf)

Verifying the configuration

# Verify that Host A and Host B can ping each other.

D:\>ping6 -s 2002:0201:0101:1::2 2002:0301:0101:1::2

 

Pinging 2002:0301:0101:1::2

from 2002:0201:0101:1::2 with 32 bytes of data:

 

Reply from 2002:0301:0101:1::2: bytes=32 time=13ms

Reply from 2002:0301:0101:1::2: bytes=32 time=1ms

Reply from 2002:0301:0101:1::2: bytes=32 time=1ms

Reply from 2002:0301:0101:1::2: bytes=32 time<1ms

 

Ping statistics for 2002:0301:0101:1::2:

    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),

Approximate round trip times in milli-seconds:

    Minimum = 0ms, Maximum = 13ms, Average = 3ms

# Verify that the ISATAP host can ping Host A.

C:\Documents and Settings\Administrator>pingv6 2002:0201:0101:1::2

 

Pinging 2002:0201:0101:1::2 with 32 bytes of data:

 

Reply from 2002:0201:0101:1::2: time=33ms

Reply from 2002:0201:0101:1::2: time=32ms

Reply from 2002:0201:0101:1::2: time=32ms

Reply from 2002:0201:0101:1::2: time=33ms

 

Ping statistics for 2002:0201:0101:1::2:

 Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),

Approximate round trip times in milli-seconds:

 Minimum = 32ms, Maximum = 33ms, Average = 32ms

Configuration files

·     Device A:

#

vlan 10

#

vlan 20

#

vlan 30

#

interface Vlan-interface10

 ip address 2.1.1.1 255.255.255.0

#

interface Vlan-interface20

 ipv6 address 2002:201:101:1::1/64

 undo ipv6 nd ra halt

#

interface Vlan-interface30

 ipv6 address 2002:201:101:2::1/64

 undo ipv6 nd ra halt

#

interface Ten-GigabitEthernet3/0/1

 port link-mode bridge

 port access vlan 10

#

interface Ten-GigabitEthernet3/0/2

 port link-mode bridge

 port access vlan 20

#

interface Ten-GigabitEthernet3/0/3

 port link-mode bridge

 port access vlan 30

#

interface Ten-GigabitEthernet3/0/4

 port link-mode bridge

#

interface Tunnel1 mode ipv6-ipv4 6to4

 source Vlan-interface10

 ipv6 address 3001::1/64

#

interface Tunnel2 mode ipv6-ipv4 isatap

 source Vlan-interface10

 ipv6 address 2001::5EFE:201:101/64

 undo ipv6 nd ra halt

#

 ipv6 route-static 2001:: 16 Tunnel2

 ipv6 route-static 2002:301:101:: 48 Tunnel1

#                               

·     Device B:

#

vlan 10

#

vlan 20

#

vlan 30

#

interface Vlan-interface10

 ip address 3.1.1.1 255.255.255.0

#

interface Vlan-interface20

 ipv6 address 2002:301:101:1::1/64

 undo ipv6 nd ra halt

#

interface Vlan-interface30

 ipv6 address 2002:301:101:2::1/64

 undo ipv6 nd ra halt

#

interface Ten-GigabitEthernet3/0/1

 port link-mode bridge

 port access vlan 10

#

interface Ten-GigabitEthernet3/0/2

 port link-mode bridge

 port access vlan 20

#

interface Ten-GigabitEthernet3/0/3

 port link-mode bridge

 port access vlan 30

#

interface Ten-GigabitEthernet3/0/4

 port link-mode bridge

#

interface Tunnel1 mode ipv6-ipv4 6to4

 source Vlan-interface10

 ipv6 address 3001::2/64

#

 ipv6 route-static 2002:201:101:: 48 Tunnel1

#