To setup the simplest IPv6 network you just have to boot up a host o.pdf

To setup the simplest IPv6 network you just have to boot up a host or two with a IPv6 enabled
operating system such as Ubuntu. Open a terminal and type:
"ip -6 address list"
You should see output similar to the following:
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1: lo: mtu 65536
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: mtu 1500
qlen 1000 inet6 fe80::922b:34ff:fe7b:6ff1/64 scope link
valid_lft forever preferred_lft forever,multicast,up,lower_up>,up,lower_up>
IPv6 link local addresses have been assigned automatically to any interfaces that you have. The
IPv6 localhost address (IPv4 127.0.0.1) is ::1/128. You can do the same on another host to gets it
IPv6 link local address and then do a IPv6 ping with "ping6" - note the 6.
1
ping6 fe80::922b:34ff:fe7b:6ff1
The fe80::/64 network prefix is the link local network as explained in the table above. It should
be the only IPv6 network address you will see across different physical networks. In fact every
host on an IPv6 network must have an link local address (fe80::/64).
Host Identifier Generation
The host identifier portion of the link local address, the remaining 64 bits, is generated from the
mac address with a algorithm applied to extend the 48 bit mac address to the 64 bit host address
required for IPv6. See EUI64 for the algorithm used. The host identifier may also be manually
assigned by the system administrator. This introduces the risk of duplicate IP addresses being
assigned, so IPv6 has a duplicate address detection protocol that allows hosts to determine if
there is a conflict before assigning itself an address.
IPv6 configuration is done using layer 3 (network layer) protocols and not layer 2 (media layer
eg. Ethernet) as with IPv4; so a valid IPv6 address is required before any additional
configuration can be done. Of couese it also allows for zero config simple networks.
Steps to Configure the Router Advertisement Service

The advertisement service can run on any Linux box, but that box will become the default route
for IPv6 traffic. In future your ADSL router will provide router advertisement services. First
assign the Linux box a static IPv6 address from the ULA network: (In the examples that follow I
use the fd5f:12c9:2201::/48 ULA routing prefix and I have chosen fd5f:12c9:2201:1::/64 as the
network prefix. (ie :1 is the subnet id).
Configure a static IPv6 on Ubuntu
1
sudo vi /etc/network/interfaces
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auto eth0
iface eth0 inet6 static
address fd5d:12c9:2201:1::1
netmask 64
autoconf 0
dad-attempts 0
accept_ra 0
Now we need to install the router advertisement service:
Router Advertisement Daemon Configuration
sudo apt-get install radvd
vi /etc/radvd.conf
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interface eth0
{
AdvSendAdvert on;
prefix fd5d:12c9:2201:1::1/64 {
AdvOnLink on;
AdvAutonomous on;
};
#Send DNS Server setting - assumes there is a DNS server setup at the address below
RDNSS fd5d:12c9:2201:1::2{
};
};
Restart the service and then on a client restart the network. You should see two IPv6 address on
your network card.
1
ip -6 address list
You can ping the router with the ping6 utility:
"ping6 fd5d:12c9:2201:1::1" if this doesn't work try "ping6 fd5d:12c9:2201:1::1 -I eth0" ->
Use the interface with the assigned IPv6 address. We will cover DNS and IPv6 in the net section.
Congratulations you have an IPv6 network up and running! If your router is multi honed and has
two interfaces with IPv6 addresses you will be able to route between the two networks. You will
need to setup two static IPv6 addresses in /etc/network/interfaces.
You can configure radvd to tell the nodes to contact the DHCP server for
So a DHCP server can be used in a stateless and stateful IPv6 setup. We will use DHCP to send
configuration information such as DNS servers and to assign IP addresses since we want to
assign fixed IP to well known hosts.
Edit the /etc/radvd.conf file
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interface eth0
{
AdvSendAdvert on;
prefix fd5d:12c9:2201:1::1/64 {
AdvOnLink on;
AdvAutonomous on;
AdvManagedFlag on; # get a full IP address from the DHCP server
AdvOtherConfigFlag on; # get other configuration info from the DHCP server
};
};
Setting up DHCP6 is similar to DHCP for IPv4. We will use the isc-dhcpd-server:
"sudo apt-get install isc-dhcp-server"
Edit the /etc/dhcpd/dhcpd6.conf: (note comments removed for clarity)
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ddns-update-style interim;
ddns-updates on;
update-conflict-detection false;
update-optimization false;
option domain-name "jumpingbean.co.za";
option dhcp6.name-servers fd5d:12c9:2201:1::2;
default-lease-time 600;
max-lease-time 7200;
include "/etc/dhcp/rndc.key";
log-facility local7;
zone jumpingbean.co.za. {
primary 127.0.0.1;
key rndc-key;
}
zone 1.0.0.0.1.0.2.2.c.9.2.1.d.5.d.f {
primary 127.0.0.1;
key rndc-key;
}
subnet6 fd5d:12c9:2201:1::/64 {
range6 fd5d:12c9:2201:1::100 fd5d:12c9:2201:1::200;
}
A lot of the configuration for DHCPv6 is the same as DHCPv4 and I am assuming you are
familiar with the configuraiton of DHCPv4 for dynamic DNS updates. Here we set up the DHCP
server to
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5

6
1: lo: mtu 65536
2: eth0: mtu 1500
Solution
To setup the simplest IPv6 network you just have to boot up a host or two with a IPv6 enabled
operating system such as Ubuntu. Open a terminal and type:
"ip -6 address list"
You should see output similar to the following:
1
2
3
4
5
6
1: lo: mtu 65536
2: eth0: mtu 1500
IPv6 link local addresses have been assigned automatically to any interfaces that you have. The
IPv6 localhost address (IPv4 127.0.0.1) is ::1/128. You can do the same on another host to gets it
IPv6 link local address and then do a IPv6 ping with "ping6" - note the 6.
1
ping6 fe80::922b:34ff:fe7b:6ff1
The fe80::/64 network prefix is the link local network as explained in the table above. It should
be the only IPv6 network address you will see across different physical networks. In fact every
host on an IPv6 network must have an link local address (fe80::/64).
Host Identifier Generation
The host identifier portion of the link local address, the remaining 64 bits, is generated from the

mac address with a algorithm applied to extend the 48 bit mac address to the 64 bit host address
required for IPv6. See EUI64 for the algorithm used. The host identifier may also be manually
assigned by the system administrator. This introduces the risk of duplicate IP addresses being
assigned, so IPv6 has a duplicate address detection protocol that allows hosts to determine if
there is a conflict before assigning itself an address.
IPv6 configuration is done using layer 3 (network layer) protocols and not layer 2 (media layer
eg. Ethernet) as with IPv4; so a valid IPv6 address is required before any additional
configuration can be done. Of couese it also allows for zero config simple networks.
Steps to Configure the Router Advertisement Service
The advertisement service can run on any Linux box, but that box will become the default route
for IPv6 traffic. In future your ADSL router will provide router advertisement services. First
assign the Linux box a static IPv6 address from the ULA network: (In the examples that follow I
use the fd5f:12c9:2201::/48 ULA routing prefix and I have chosen fd5f:12c9:2201:1::/64 as the
network prefix. (ie :1 is the subnet id).
Configure a static IPv6 on Ubuntu
1
sudo vi /etc/network/interfaces
1
2
3
4
5
6
7
auto eth0
iface eth0 inet6 static
address fd5d:12c9:2201:1::1
netmask 64
autoconf 0
dad-attempts 0
accept_ra 0
Now we need to install the router advertisement service:
Router Advertisement Daemon Configuration
sudo apt-get install radvd
vi /etc/radvd.conf
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3
4
5
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11
interface eth0
{
AdvSendAdvert on;
prefix fd5d:12c9:2201:1::1/64 {
AdvOnLink on;
AdvAutonomous on;
};
#Send DNS Server setting - assumes there is a DNS server setup at the address below
RDNSS fd5d:12c9:2201:1::2{
};
};
Restart the service and then on a client restart the network. You should see two IPv6 address on
your network card.
1
ip -6 address list
You can ping the router with the ping6 utility:
"ping6 fd5d:12c9:2201:1::1" if this doesn't work try "ping6 fd5d:12c9:2201:1::1 -I eth0" ->
Use the interface with the assigned IPv6 address. We will cover DNS and IPv6 in the net section.
Congratulations you have an IPv6 network up and running! If your router is multi honed and has
two interfaces with IPv6 addresses you will be able to route between the two networks. You will
need to setup two static IPv6 addresses in /etc/network/interfaces.
You can configure radvd to tell the nodes to contact the DHCP server for
So a DHCP server can be used in a stateless and stateful IPv6 setup. We will use DHCP to send
configuration information such as DNS servers and to assign IP addresses since we want to
assign fixed IP to well known hosts.
Edit the /etc/radvd.conf file

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2
3
4
5
6
7
8
9
10
interface eth0
{
AdvSendAdvert on;
prefix fd5d:12c9:2201:1::1/64 {
AdvOnLink on;
AdvAutonomous on;
AdvManagedFlag on; # get a full IP address from the DHCP server
AdvOtherConfigFlag on; # get other configuration info from the DHCP server
};
};
Setting up DHCP6 is similar to DHCP for IPv4. We will use the isc-dhcpd-server:
"sudo apt-get install isc-dhcp-server"
Edit the /etc/dhcpd/dhcpd6.conf: (note comments removed for clarity)
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2
3
4
5
6
7
8
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10
11
12
13

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15
16
17
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19
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25
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29
ddns-update-style interim;
ddns-updates on;
update-conflict-detection false;
update-optimization false;
option domain-name "jumpingbean.co.za";
option dhcp6.name-servers fd5d:12c9:2201:1::2;
default-lease-time 600;
max-lease-time 7200;
include "/etc/dhcp/rndc.key";
log-facility local7;
zone jumpingbean.co.za. {
primary 127.0.0.1;
key rndc-key;
}
zone 1.0.0.0.1.0.2.2.c.9.2.1.d.5.d.f {
primary 127.0.0.1;
key rndc-key;
}
subnet6 fd5d:12c9:2201:1::/64 {
range6 fd5d:12c9:2201:1::100 fd5d:12c9:2201:1::200;

}
A lot of the configuration for DHCPv6 is the same as DHCPv4 and I am assuming you are
familiar with the configuraiton of DHCPv4 for dynamic DNS updates. Here we set up the DHCP
server to
1
2
3
4
5
6
1: lo: mtu 65536
2: eth0: mtu 1500

To setup the simplest IPv6 network you just have to boot up a host o.pdf

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To setup the simplest IPv6 network you just have to boot up a host o.pdf