No IPv6 from Gandi to Renater

gistfile1.txt

% traceroute6 www.enst.fr 
traceroute to vili.enst.fr (2001:660:330f:34::8) from 2001:4b98:dc0:41:216:3eff:fece:1902, 30 hops max, 16 byte packets
 1  2001:4b98:dc0:41::248 (2001:4b98:dc0:41::248)  2.016 ms  0.513 ms  1.633 ms
 2  p250-core1-d-ip6.paris.gandi.net (2001:4b98:1f::c1d1:237)  0.74 ms  0.588 ms  0.484 ms
 3  p251-core2-d-ip6.paris.gandi.net (2001:4b98:1f::c1c2:246)  0.694 ms  0.604 ms  0.482 ms
 4  20gigabitethernet1-3.core1.ams1.ipv6.he.net (2001:7f8:1::a500:6939:1)  18.014 ms  23.649 ms  25.547 ms
 5  amsix.xcr1.amd.cw.net (2001:7f8:1::a500:1273:1)  62.511 ms  44.093 ms  44.057 ms
 6  so-2-0-0-dcr1.bru.cw.net (2001:5000:0:128::2)  47.159 ms  47.088 ms  47.082 ms
 7  xe-4-0-0-xcr2.bru.cw.net (2001:5000:0:16f::2)  46.899 ms  46.949 ms  47.001 ms
 8  so-7-0-0-dcr1.par.cw.net (2001:5000:0:103::1)  49.572 ms  49.617 ms  49.557 ms
 9  * * *
10  * * *
11  * * *
12  * * *
13  * * *
14  * * *
15  * * *

Same thing for www.nic.fr, etc