Cisco Packet Tracer 8.2.2 - IPv6 ping from PC to VLAN interface fails

[PaulFoster]

I can't do ping from PC-A and PC-B to interface VLAN 4 of Switch1 and Switch2 by using IPv6 addresses. But same pings with IPv4 addresses are working. What can I do to fix that problem?

Pkt file and txt files with configuration of every device are on Google Drive: 

https://drive.google.com/file/d/1SjkKOjXZRBlt4yS5qNQyZCV5a6aAAgWW/view?usp=drivesdk

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[Harold Ritter]

Hi @PaulFoster ,

The pkt file is not attached.

[Jens Albrecht · Accepted solution]

Hello @PaulFoster,

there appear to be 2 reasons for the failure of your IPv6 pings.

First of all, looking at your configs the switches have no IPv6 gateway.

The PCs are in Vlans 2 and 3 while the SVIs of your switches are assigned to Vlan 4. So without a gateway the switches have no idea where to send the packets.

For IPv6 there is no default-gateway command but instead there are 2 common solutions. Either a router sends RAs for that subnet, telling all devices that it can be used as a gateway or you can configure a static IPv6 default route.

This leads us to the second reason for the IPv6 ping failures, i.e. limitations of Packet Tracer itself.

IPv6 seems not to work on the switches as expected since you cannot even ping the link-local address of the router from the switches.

The same config on my physical lab works just fine as my router does send Router Advertisements so that the switch knows where to send the IPv6 packets for different networks.

If you want to practice IPv6 on switches you should take a look at CML-FREE.
It can be downloaded for free after registering here: https://mkto.cisco.com/cml-free.html

HTH!

[PaulFoster]

Can you please write a specific commands for solving this problem? Because I can't figure it out.

[Harold Ritter · Accepted solution]

Hi @PaulFoster ,

The issue is that Cisco Packet Tracer does not seem to work over SVI and trunk. I am attaching a modified version of your topology not using trunks and where PC A can ping both S1 and S2 over IPv6. It is not ideal, but it works. If you want to run more elaborate labs, I should definitely use CML as @Jens Albrecht recommended (or other simulators such as EVE-NG or GNS3).