RV345 how to set DHCPv6 prefix hint?

[RobertLundy25265]

So basically, I want to have two VLANs on my RV345: one for just my PC and the other for my WI-FI AP. I am able to receive an IPv6 address from Comcast and a /64 prefix without issue. If I put every port onto one VLAN, IPv6 works without issue. But once I split them up, it does not. I am aware that I need at least a /60 prefix in order for both VLANs to have IPv6 access and Comcast will supposedly give them to you if you give a prefix hint, but I see no way for me to add one. Does the RV345 not allow you to set one? It seems a poor design for a "small business" router not to be able to do that.

[marce1000]

   - https://cfnng.cisco.com/browse/routing/features -> Looks like this small business router can not do that. Check attached document.

 M.

[RobertLundy25265]

That document doesn't even list any small business routers. How can you be sure that means it can't give a prefix hint? None of it's other features are listed.

[Martin Aleksandrov]

Hi Robert,

Take a look at the following thread that might be of your help:

https://community.cisco.com/t5/small-business-routers/trying-to-get-ipv6-working-with-comcast-virginia-on-a-cisco/td-p/4155418 

Regards,

Martin

[RobertLundy25265]

So my understanding based on that is this:

If I want the prefix length to 60 I should type that into the "Prefix" field in the VLAN settings.

The router will then solicit the CMTS for a /60 prefix.

[RobertLundy25265]

Wireshark capture of multicast advertisement:

 

[train_wreck]

Were you able to get this to work on the RV345? You said you entered "60" into a "Prefix" field, but I don't see a field labeled "Prefix" on the VLAN settings.