10.4.3 Packet Tracer (Basic Device Config): IPv6 address is wrong

[enyearty]

Good afternoon,

I've completed the exercise to 91% but am unable to finish because the assessment keeps saying that I have the wrong IPv6 configuration for the router.
I have assigned it 2001:DB8:CAFE:1::1/64 and 2001:DB8:CAFE:2::1/64 for Gigabitethernets 0/0 and 0/1, respectively but it won't give me the point in Assessment Items. I was able to get the score up to 95% by changing them to 2001:DB8:A::1/64 and 2001:DB8:B::1/64, but nothing about those are anymore correct... Does anyone know what I have to do?
Thanks

[David Ruess]

I was unable to use the PT file as its from an older version of PT. Does it tell you what IPv6 address to use? Can you copy the instructions in here or send a screenshot of the task/config?

-David

[enyearty]

Hi David,

The instructions didn't dictate the exact address to use, but the "10.4.3_task-config.png" shows the instructions and router configuration,  while the "10.4.3_assessment.png" shows that it might be expecting a non-compatible address for this network with a /64 prefix. Unless I'm more lost than I think... Thank you!

-Enyearty

[Georg Pauwen]

Hello,

odd indeed. When I change the IPv6 addresses to the ones the assessment tool supposedly sees, at least the prefix length changes to correct:

interface GigabitEthernet0/0
description LAN connection for Class-A
ip address 172.14.5.1 255.255.255.0
duplex auto
speed auto
ipv6 address FE80::1 link-local
ipv6 address 2001:DB8:A::1/64
!
interface GigabitEthernet0/1
description LAN connection for Class-B
ip address 172.14.10.1 255.255.255.0
duplex auto
speed auto
ipv6 address FE80::2 link-local
ipv6 address 2001:DB8:B::1/64

[enyearty]

Hi Georg,

But with a /64 prefix of 2001:DB8:A:: or 2001:DB8:B::, wouldn't that make them belong to a different network than 2001:DB8:CAFE::?

[NetworkDave · Accepted solution]

@enyearty,

You are correct, the IPv6 addresses do not match the networks.
The Topology shows the two networks:   2001:DB8:CAFE:1::/64 and 2001:DB8:CAFE:2::/64
The Assessment shows IPv6 addresses: 2001:DB8:A::1/64 and 2001:DB8:B::1/64
Topology    > College Router > G0/0 (2001:DB8:CAFE:1::/64) and G0/1 (2001:DB8:CAFE:2::/64)
Assesment > College Router > G0/0 (2001:DB8:A::1/64) and G0/1 (2001:DB8:B::1/64)

As @Georg Pauwen has mentioned, "odd indeed". Both of you have pointed out that 2001:DB8:A::1/64 and 2001:DB8:B::1/64 causes the assessment to mark the prefix length as correct (the IPv6 address still shows as incorrect). Other IPv6 addresses tried, show as incorrect for both parameters.

I tried the same pka from a different souce and the got the same result. Also reset PKA and tried 5 different topologies of this activity. The IPv6 addresses matched the networks. The assessment indicated that the IPv6 addresses and Prefix Length were both correct.

Conclusion: There is an error in the assessment tool for this specific topology.

Solution: Be content with 95%; knowing the you completed all tasks successfully (including troubleshooting) ... or ... You can complete a different topology version for 100%. Attached is a zipped file that has a different topology (though similar) to the one with the error. Your user profile remains the same. Also, the IPv6 global unicast addresses have been configured.

HTH
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