The following is based on the configuration exercise 10-1: Configuring OSPFv6 Addresses and OSPF for IPv6 Routing, of the BSCI Authorized Self Study Guide.

Figure 1: IPv6 Addressing Configuration Exercise Topology

Task 1: Configure IPv6 globally on the routers and configure addresses on all interfaces.

• Use the following chart to configure the parameters:

• Dynamips/Dynagen .net configuration for the proceeding lab excercise.

[localhost]

    [[7200]]
        image = \\\\C7200.BIN
        # On Linux / Unix use forward slashes:
        # image = /opt/7200-images/c7200-jk9o3s-mz.124-7a.image
        npe = npe-400
        ram = 160

    [[ROUTER P1R1]]
        Fa0/0 = P1R3 Fa0/0
        S1/0 = P1R2 s1/0
        model = 7200
        console = 2001
        idlepc = 0x6082d7a0

    [[router P1R2]]
        Fa0/0 = P1R4 Fa0/0
        model = 7200
        console = 2002
        idlepc = 0x607016a0

    [[router P1R3]]
        s1/0 = P1R4 s1/0
        model = 7200
        console = 2003
        idlepc = 0x607016a0

    [[router P1R4]]
        model = 7200
        console = 2004
        idlepc = 0x607016a0

Configure the following on all routers:

• Enable IPv6.
• Enable CEFv6.
• Configure IPv6 global address on all fa0/0 and s1/0 interfaces.

Here is an example of the configuration for P1R1

Figure 2: P1R1 Configuration

• IPv6 is enabled by configure the ipv6 unicast-routing global configuration command.
• Enable CEFv6 by configuring the ipv6 cef global configuration command.
  • This enables Cisco Express Forwarding (CEF) for IPv6, which is a Layer 3 IP switching technology for the forwarding of IPv6 packets. When CEFv6 is enabled, network entries that are added, removed, or modified in the IPv6 Routing Inforamtion Base (RIB), as dictated by the routing protocol in use, are reflected in the Forwarding Information Bases (FIBs), and the IPv6 adjacency tables maintain Layer 2 next-hop addresses for all entries that are in each FIB.
• Use the ipv6 address address/prefix-length [eui-64] interface configuration command.
  • The eui-64 paramater forces the router to complete the addresses’ low-order 64-bits using an EUI-64 format interface ID.

Verify that IPv6 has been configured on interface fa0/0:

Figures 3 & 4: Output of sh ipv6 interface command:

• Notice the highlighted link-local address that was automatically configured on the interfaces.
• Also notice the addresses that have been configured with the ipv6 address command, with the specified prefix and interface ID in EUI-64 format.

Task 2: Enable OSPF on all routers.

• Enable IPv6 OSPF on each router.
• Configure the router ID for each router, based on the chart above.
• Enable IPv6 OSPF in area 0 on all enabled FastEthernet and Serial interfaces.

Figure 5: IPv6 OSPF Configuration on P1R4

• Use the ipv6 router ospf process-id global configuration command to enable OSPFv3.
• A router ID must be configured using router-id router-id router configuration command.
• Use the ipv6 ospf process-id area area-id [instance instance-id] interface configuration command to enable OSPF for IPv6 on an interface.
  • The network area command used in OSPFv2 is not used in OSPFv3. Rather, interfaces are directly configured to specify which IPv6 networks are part of the OSPFv3 network.

Verification

Figure 6: Show IPv6 OSPF Interface

• The figure above shows IPv6 is enabled on all interfaces, with process ID 100 in area 0.

Figure 7: Show Ipv6 OSPF Neighbor

• Shows both neighbors of router P1R4.

Figure 8: Show IPv6 Route

• Displays the IPv6 routing table.

The next few posts should be the last of the remaining topics I need to cover before I go back and do a final review in preparation for the BSCI exam. I still haven’t decided when I’m going to take the exam though. I’m hoping by March 15th. Our second baby is due around mid-April so I need to make sure that I’ll be ready to take the test before that time arrives. Otherwise I’ll probably have to postpone my exam for a few more months – knowing that having a newborn and another one who will be 3 by then will surely put a strain on my studies. I may end up going for the composite exam if it were to go that route. And it’s an option I’ve been seriously considering. We’ll see how it goes.

I’ve been finishing up some lab exercises the last few days. Today was specially hard studying because my body is just aching from soreness all over. We just started our basketball league with old friends whom I’ve been ballin with for the last few years. It’s good way for me to keep in shape since, with all the studying I do, that really is the only physical activity I get to involve myself in. I’m hoping that in the next few weeks, I’ll get in better shape, which in turn will help with my stamina specially in those long study hours.  Ultimately, I’ll need all that stamina when the new baby arrives.

What time is it?