[outages] HE IPv6 tunnel PMTU issues with juniper.net

Gary Gapinski gapinski at nasa.gov
Wed Oct 1 10:17:01 EDT 2014


On 10/01/2014 01:50 PM, Chuck Anderson via Outages wrote:
> While on my Hurricane Electric IPv6 tunnel, I cannot access
> juniper.net unless I change my local interface MTU.  1500 fails, but
> 1280 works.  I noticed this a few days ago.  Before that I had no
> problems with a 1500 MTU.  Is anyone else seeing this issue?

No, but if your are using a 6in4 tunnel, the MTU should be 1480 (not 1500).

(I just successfully went to www.juniper.net via IPv6 with that MTU 1480.)



More information about the Outages mailing list