IPv6 Global Unicast Addressing 1

By certskills September 12, 2016 09:05

IPv6 addresses just take a little getting used to. This next lab gives you same reps with configuring Global Unicast addresses, while giving you a few mind-bending exercises to make you think about Link Local addresses and EUI-64. I would not worry about speed on this one, but working through it so you’re clear is a useful exercise for you CCENT and CCNA candidates. Enjoy!


Configure IPv6 addresses on the routers R1 and R2 per these rules:

  • Configure global unicast addresses on four router interfaces as shown in Table 1.
  • Cause the link local addresses listed in Table 2 to be used, but without configuring these addresses directly. Instead, use the mac-address command to configure each interface’s MAC address so that the router chooses the link local addresses shown.
  • Assume all router interfaces shown in the lab are up and working.


Table 1 – Final IPv6 Address Assignments (/64 prefixes)

Device Interface IPv6 Address
R1 GigabitEthernet0/1 3000:23DA:FEDA:BCA1:9374:CBAE:EBDA:9182
R1 GigabitEthernet0/2 2500:B:AE:83D:B91:A024:BCA2:8374
R2 GigabitEthernet0/1 3000:23DA:FEDA:BCA1:BA71:FDEA:9817:BC71
R2 GigabitEthernet0/2 2500:BA71:8263:BA71:BD87:1786:0:9283


Table 2 – Link Local Addresses to Use, Based on Configuring MAC Addresses

Device Interface IPv6 Address
R1 GigabitEthernet0/1 FE80::2E25:DBFF:FEEF:A3DF
R1 GigabitEthernet0/2 FE80::A83D:FEFF:FEEA:1353
R2 GigabitEthernet0/1 FE80::9CAB:28FF:FEDF:AB24
R2 GigabitEthernet0/2 FE80::BE81:BAFF:FE82:8362

Figure 1: Global IPv6 Addressing Topology


Initial Configuration

Example 1 and 2 show the beginning configuration state of R1 and R2.

Example 1: R1 Config


Example 2: R2 Config


Answer on Paper, or Maybe Test in Lab

Next, write your answer on paper. Or if you have some real gear or other tools, configure the lab using them.

To test your solution if you happen to try it with VIRL or real gear, you can verify it by going to each of the routers and verifying the address configured and calculated by the device match Table 1; this can be done with the show ipv6 interface or show ipv6 interface brief commands. Pay close attention to the link local addresses in this lab.


Do this Lab with Cisco’s VIRL

You can do these labs on paper and still get a lot out of the lab. As an extra help, we have added files for the Virtual Internet Routing Lab (VIRL) software as well. The .VIRL file found here is a file that when used with VIRL will load a lab topology similar to this lab’s topology, with the initial configuration shown in the lab as well. This section lists any differences between the lab exercise and the .VIRL file’s topology and configuration.

Download this lab’s VIRL file!

The virl topology matches this lab topology exactly. The host info does as well.

Answers: IPv6 Standard ACL 1
Multilink PPP 1
By certskills September 12, 2016 09:05
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