[FS#650] 6in4 addresses are not advertised via DHCP.

[LEDE Bugs]

A new Flyspray task has been opened.  Details are below. 

User who did this - neheb (neheb) 

Attached to Project - LEDE Project
Summary - 6in4 addresses are not advertised via DHCP.
Task Type - Bug Report
Category - Base system
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - Low
Priority - Very Low
Reported Version - Trunk
Due in Version - Undecided
Due Date - Undecided
Details - Supply the following if possible:
 - Archer C7v2
 - master
 - Steps to reproduce
   Set up a 6in4 tunnel.
   Connect to the network using DHCP.

   I'm guessing this is an odhcpd bug since IPv6 advertising is done through it. Not sure if this applies to router advertisements or DHCPv6.

   As a result, the router has an IPv6 connection but nothing else does. Interestingly enough the log is full of spam like this:

   odhcpd[962]: A default route is present but there is no public prefix on br-lan thus we don't announce a default route!

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=650