IPV6 IPv6 Routing Lab By Rob Hamm, Instructor Computer Information Systems Administration British Columbia Institute of Technology

1. IPv6 Routing Lab
Quick review of IPv6 Addressing
Basic v6 Router configs
Setting up OSPFv3
Setting up DHCPv6
By: Rob Hamm
Instructor
Computer Information Systems Administration
British Columbia Institute of Technology

2. Fa 0/0
PC1
PC2
PC3
R2
R3 ISP
R1
Ser 0/1/0
.2
Ser 0/1/0
.1
Ser 0/1/0
.2
Ser 0/2/0
.1
Ser 0/2/0
.2
Ser 0/1/0
.1
Fa 0/0
Fa 0/0
2000:1::/64
2000:5::/64
2000:6::/64
2000:3::/64
2000:2::/64 2000:4::/64
IPv6 Lab Topology
1. Setup static addresses
2. Setup OSPFv3
3. Create static/default routes
4. Setup DHCPv6

3. 2000 : 0001 : 0000 : 0000 : 0000 : 0000 : 0000 : 0001 / 64
0010 0000 0000 0000 : 0000 0000 0000 0001 : …
 IPv6 addresses are 128-bit addresses represented in:
 Eight 16-bit segments or “hextets”
 Hexadecimal (non-case sensitive) between 0000 and FFFF
 Separated by colons
 Subnet masks shown as a prefix length (in bits)
16 bits 16 bits 16 bits 16 bits 16 bits 16 bits 16 bits 16 bits
<-------------- Network -----------> <--------------- Host ------------->

4. 2000 : 0001 : 0000 : 0000 : 0000 : 0000 : 0000 : 0001 / 64
 No More Subnetting! (sort of)
 Default/standard addresses use 3-1-4 rule
 3 hextets for networks (281 Trillion)
 1 hextet for subnets (65,536)
 4 hextets for hosts (18 Quintillion = Billion x Billion)
16 bits 16 bits 16 bits 16 bits 16 bits 16 bits 16 bits 16 bits
<-------- Network -----> <--------------- Host -------------><Subnet>

5. Two Rules for Address Abbreviation
Rule 1: Leading zeroes in any segment can be omitted
2000 : 0001 : 0000 : 0000 : 0000 : 0000 : 0000 : 0001 / 64
2000: 1 : 0 : 0 : 0 : 0 : 0 : 1 / 64
Rule 2: A single contiguous string of all-zero segments can be
represented with a double colon.
2000 : 0001 : 0000 : 0000 : 0000 : 0000 : 0000 : 0001 / 64
2000: 1 :: 1 / 64
<-------------- Network -----------> <--------------- Host ------------->
<-------------- Network -----------> <--------------- Host ------------->

6. IPv6 Addressing
IPv6 Address Types:
MulticastUnicast Anycast
Assigned Solicited
Global Unicast UnspecifiedLoopback
Embedded IPv4
Link-Local Unique Local
FF00::/8 FF02::1:FF00:0000/104
::/128::1/1282000::/3
3FFF::/3
FE80::/10
FEBF::/10
FC00::/7
FDFF::/7
::/80
Note: There are no broadcast addresses in IPv6

7. Interface IDSubnet IDGlobal Routing Prefix
Structure of a Global Unicast Address
n bits m bits 128-n-m bits
001 Range 2000::/3 to 3FFF::/3
7
IANA’s allocation of IPv6 address space in 1/8th sections
• Global unicast addresses
are similar to IPv4
addresses.
• Routable
• Unique

8. Stateless
Autoconfiguration
Global Unicast
Static Global Unicast Addresses
Dynamic
IPv6
Unnumbered
DHCPv6
Static EUI-64
Manual
IPv6 Address

9. R1# conf t
R1(config)#
R1(config)# interface fa 0/0
R1(config-if)# ipv6 address 2000:1::1/64  Manual Static
OR
R1(config-if)# ipv6 address 2000:1::/64 EUI  Manual EUI-64
2 Ways to Configure a Static Global Unicast Address
No Host Portion

10. R1(config)# ipv6 router ospf 1
R1(config-rtr)# router-id 1.1.1.1  still use 32 bit router ID
R1(config-rtr)# exit  NO network statements at all!
R1(config)# interface fa0/0
R1(config-if)# ipv6 ospf 1 area 0
Default route on R3
R3(config)# ipv6 route ::/0 Serial0/1/0
R3(config)# ipv6 router ospf 1
R3(config-rtr)# default-information originate  still same
Configuring OSPFv3

11. ! SLAAC configures IP address & Default Gateway on hosts
! DHCP is necessary to provide DNS information
R1(config)# ipv6 dhcp pool cisco1
R1(config-dhcp)# dns-server 2000:6::2
R1(config-dhcp)# exit
R1(config)# interface fa 0/0
R1(config-if)# ipv6 dhcp server cisco1
! Tell ICMPv6 to set “O” flag so clients will accept DHCP info
R1(config-if)# ipv6 nd other-config-flag
Configuring Stateless DHCPv6

12. show ipv6 interface brief command on router R1
R1# show ipv6 interface brief
FastEthernet0/0 [up/up]
FE80::203:6BFF:FEE9:D480
2000:1::1 Global unicast address
Link-local unicast address
12
• Link-local address automatically created when/before the
global unicast address is.
• We will discuss link-local addresses next.

13. PC1> ipconfig
Windows IP Configuration
Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . :
IPv6 Address. . . . . . . . . . . : 2000:1::2
Link-local IPv6 Address . . . . . : fe80::50a5:8a35:a5bb:66e1%11
Default Gateway . . . . . . . . . : 2000:1::1
13
PC1: Static Global Unicast Address

14. Global Unicast
Manual
IPv6
UnnumberedIPv6 Address Stateless
Autoconfiguration
DHCPv6
Static EUI-64
14
Dynamic
2 Ways to Configure a Dynamic Global Unicast Address

15. R1
DHCPv6 Server
• Neighbor Discovery Protocol
• The router’s Router Advertisement (RAs)determines how the
host gets its dynamic address configuration.
• ipv6 unicast-routing command enables router to send RAs.
• Default = Stateless Address Auto Configuration (SLAAC)
• Router uses ICMPv6 to deliver IP address & D.G. via RA.
• Other Options:
• Stateless DHCPv6 – delivers only additional info (e.g. DNS)
• Stateful DHCPv6 – delivers all IP info
RA 
 RS
 DNS info

16. • Used to communicate with other devices on the link.
• Are NOT routable off the link.
• An IPv6 device must have at least one link-local address.
• Used by:
• Hosts to communicate to the IPv6 network before it has a
global unicast address.
• Used as the default gateway address by hosts.
• Adjacent routers to exchange routing updates
Interface ID
/64
1111 1110 10xx xxxx
FE80::/10
Remaining 54 bits10 bits 64 bits
EUI-64, Random or Manual Configuration
Link-local unicast

17. PC1> ipconfig
Windows IP Configuration
Ethernet adapter Local Area Connection:
IPv6 Address. . . . . . . . . : 2000:1::D2FF:FE8C:E04C
Link-local IPv6 Address . . . : fe80::50a5:8a35:a5bb:66e1%11
Default Gateway . . . . . . . : fe80::200:CFF:FEDA:37D7
Windows Addresses
• WinXP and Server 2003 use EUI-64.
• Vista & Win7/8 use pseudo random 64-bit Interface ID.
• The %11 following the address is a Windows Zone ID (not IPv6).

18. IPv6 Resources
• IPv6 Fundamentals, Rick Graziani, Cisco Press
• www.cabrillo.edu/~rgraziani/ipv6/Site/IPv6.html
– Watch Rick’s videos and check out his PPTs
• Keith Barker’s YouTube Channel has a fantastic 9-video playlist on
IPv6 (most are 15-20 minutes long)