[Bug 220351] Path MTU discovery works only after resetting an internal interface MTU (mpd5, ng_nat, ipfw)

[Eugene Grosbein]

03.07.2017 3:31, Herbert J. Skuhra wrote:

>> Instead of enabling ipv6cp in mpd5 I've also tested with an IPv6 tunnel
>> from HE... same issue. :-(
> 
> Hmm, adding "mtu#1440" to /etc/rtadvd.conf apperently fixes these
> issues. Makes sense?

Perhaps, as temporary workaround. You could fill new IPv6-related PR on this.