IPv6 r6

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IP Version 6

This lab will provide an introduction to configuring IPv6 on an OmniSwitch.

Equipment Required:

One OmniSwitch

Two IPv6 enabled PCs

Objective:

This lab will introduce the IPv6 protocol. IPv6 is the next generation IP
protocol that allows for an increased number of IP address and ease of IP
address management.

Related Commands:

show ipv6 interface, ipv6 interface <int_name>,
ping6 <ipv6 address>,

Supported Platforms:

All

Lab Steps

Enabling IPv6 on an OmniSwitch

– Link Local Addressing

Enabling IPv6 on an OmniSwitch is similar to enabling IPv4. An IPv6 interface
will need to be enabled and associated with a VLAN. The OmniSwitch will
automatically create a Link Local IPv6 address.
Type/perform the following.

1. Remove any existing configuration from the WORKING

directory and reboot.

2. Connect your PC to the switch to activate VLAN 1
3.

-> show ipv6 interface

-> show ipv6 interface
Name IPv6 Address/Prefix Length Status Device
--------------------+-------------------------------------------------+-------+----------
loopback ::1/128 Active Loopback

You may see some IPv6 addresses already setup. In IPv6, the address ::1
indicates an IPv6 loopback address.
Type the following:

-> ipv6 interface vlan1_v6 vlan 1

-> show ipv6 interface

-> show ipv6 interface vlan1_v6

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-> show ipv6 interface
Name IPv6 Address/Prefix Length Status Device
--------------------+-------------------------------------------------+-------+----------
vlan1_v6 fe80::2d0:95ff:fe6b:943/64 Active VLAN 1
loopback ::1/128 Active Loopback

You should see the newly created interface with an IP address in the fe80 range.
The fe80 range indicates that this is a Link Local address and was automatically
created by the IPv6 interface. The address breaks down as follows:

fe80 - Link local as stated in the IPv6 protocol

- Replaces a string of zeros

02d0:95ff:fe6b:9430

– MAC address of OmniSwitch router interface with

bit of leftmost byte complemented and fffe inserted after the 3

octet.

This is part of the IPv6 protocol

/64

– Network Prefix

Now t

hat IPv6 is enabled on the switch, let’s try a basic connectivity test using

PING to the loopback interface.
Type the following:

-> ping6 ::1

-> ping6 ::1
Ping6(56=40+8+8 bytes) ::1 --> ::1
16 bytes from ::1, icmp_seq=0 hlim=64 time=424 usec
16 bytes from ::1, icmp_seq=1 hlim=64 time=506 usec
16 bytes from ::1, icmp_seq=2 hlim=64 time=482 usec
16 bytes from ::1, icmp_seq=3 hlim=64 time=473 usec
16 bytes from ::1, icmp_seq=4 hlim=64 time=475 usec
16 bytes from ::1, icmp_seq=5 hlim=64 time=682 usec
--- ::1 ping6 statistics ---
6 packets transmitted, 6 packets received, 0% packet loss
round-trip min/avg/max = 0.424/0.507/0.682 ms

-> ping6 fe80::02d0:95ff:fe##:#### vlan1_v6

(##:#### is your IPv6 interface address)

(vlan1_v6 indicates which interface to send from)

Device connectivity using IPv6 and Link Local Addressing
Using IPv6, the process of getting PCs and switches to communicate is
simplified. The IPv6 protocol uses Link Local addressing to allow communication.
This lab assumes you’re using the Windows XP machines provided in the
classroom.
Type/perform the following:

c:\ipv6 install

10.

c:\ ipconfig /all

You should see that your PC automatically configured itself with an IPv6 Link
Local address. This allows communication between the PC and the switch.

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Type/perform the following:

11.

c:\ ping fe80::02d0:95ff:fe##:####%4

(Note: replace ‘4’ with the appropriate source interface)

Enabling IPv6 on an OmniSwitch

– Site Local Addressing

Link Local addresses are automatically created by interfaces running the IPv6
protocol. However, Link Local addresses are not routable. In order to route IPv6
traffic between VLANs on an OmniSwitch we must create a Site Local Address.
Type the following:

12.

-> ipv6 address fec0::/64 eui-64 vlan1_v6

13.

-> show ipv6 interface

You should now see that a Site Local Address in the fec0:: range has been
created and associated with the vlan1_v6 interface.
Type/perform the following

14.

c:\ipconfig

You should see that the PC also has an IP address in the
fec0: range. IPv6 uses Neighbor Advertisements to tell the
PC its Site Local Address, matching that of the OmniSwitch.
Type the following:

15.

-> ping fec0::02d0:95ff:fe##:####%1

Routing IPv6 on an OmniSwitch
Now that VLAN 1 has a Site Local routable address, perform the same steps for
another VLAN on the OmniSwitch and connect an IPv6 enabled PC to that
VLAN. Then use PING to test routing connectivity from one PC to another.
Perform the following: (Quick Steps)

16. Create another VLAN on the OmniSwitch
17. Move a port into that VLAN
18. Connect an IPv6 enabled PC to that port
19. Create another IPv6 interface and associate it with the VLAN
20. Test connectivity to the Link Local Address from the PC
21. Create a Site Local Address in a different network. (i.e.

fec1)