ATT (AS7018) cannot reach AS31334

[David Hill <dhill+nanog () mindcry org>]

Hi -

I am a ATT customer unable to reach AS31334.  Is anyone on this list
able to check into this?  It works from non-ATT route-servers I have
tested on.

ATT route-server
----------------
rviews () route-server ip att net> ping 2a02:8100:4:2::156e count 3 
PING6(56=40+8+8 bytes) 2001:1890:111d:1::28 --> 2a02:8100:4:2::156e

--- 2a02:8100:4:2::156e ping6 statistics ---
3 packets transmitted, 0 packets received, 100% packet loss

Thank you,
David