#19602: Crash/softbrick when enabling IPv6/wan6 (@wan) on pppoe-wan in recent 
trunk
------------------------+----------------------
  Reporter:  anonymous  |      Owner:  cyrus
      Type:  defect     |     Status:  assigned
  Priority:  normal     |  Milestone:
 Component:  packages   |    Version:  Trunk
Resolution:             |   Keywords:
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Comment (by anonymous):

 I've done some testing and what you're saying doesn't seem to be accurate
 (on revision 45674).

 If I use LuCI for setting IPv6 on the pppoe-wan link it will either set
 option ipv6 to 0 or 1, not auto. I guess LuCI has not been adapted for
 this. Either way, setting it manually with uci to 0, 1 or auto, or even
 removing the setting all together will not spawn odhcp6c on the wan link.
 (Yes, I know how to use uci commit, etc.) :)

 I'll try again to add a wan6 (@wan) adapter and see what happens, but from
 previous experience it will probably need a soft reset. I'll report later.
 Also considering this, an upgrade BB -> CC would cause quite a few
 configurations to be semi-bricked, if this is a common occurence. Right?

 Anyway, thanks for helping!

 /etc/config/network:
 {{{
 config interface 'loopback'
         option ifname 'lo'
         option proto 'static'
         option ipaddr '127.0.0.1'
         option netmask '255.0.0.0'

 config globals 'globals'
         option ula_prefix 'fxxx:xxxx:xxxx::/48'

 config interface 'lan'
         option ifname 'eth0.1'
         option force_link '1'
         option type 'bridge'
         option proto 'static'
         option netmask '255.255.255.0'
         option ipaddr '172.x.x.1'
         option ip6assign '64'

 config switch
         option name 'switch0'
         option reset '1'
         option enable_vlan '1'

 config switch_vlan
         option device 'switch0'
         option vlan '1'
         option ports '0t 2 3 4 5'

 config switch_vlan
         option device 'switch0'
         option vlan '2'
         option ports '0t 1'

 config interface 'wan'
         option proto 'pppoe'
         option ifname 'eth0.2'
         option username 'secret'
         option password 'moresecret'
 }}}

--
Ticket URL: <https://dev.openwrt.org/ticket/19602#comment:3>
OpenWrt <http://openwrt.org>
Opensource Wireless Router Technology
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