Resolve reverse in IPv6

[NDSoftware]

Hello,

I can resolve reverse and forward in IPv4.
I can resolve forward in IPv6 but i can't resolve reverse in IPv6.

Why ?

The machine who have the problem:
host -t any 3ffe:8270::1
3ffe:8270::1.extnet.ndsoftware.net does not exist (Authoritative answer)

A another machine:
host -t any 3ffe:8270::1
Host \[x3FFE8270000000000000000000000001/128].ip6.arpa. not found:
2(SERVFAIL)

I have on both machine BIND 9.1.3


The machine who have the problem:
traceroute to 6bone.net (3ffe:b00:c18:1::10) from 3ffe:8271:2101:1::1,
30 hops max, 16 byte packets
 1  3ffe:8271:1000:22::1 (3ffe:8271:1000:22::1)  1.435 ms  9.343 ms
1.818 ms
 2  3ffe:8271:10ff:11::1 (3ffe:8271:10ff:11::1)  68.509 ms  237.82 ms
69.479 ms
 3  3ffe:b00:c18:1:290:27ff:fe17:fc0f
(3ffe:b00:c18:1:290:27ff:fe17:fc0f)  403.264 ms  560.737 ms  327.851 ms
 4  3ffe:b00:c18:1::10 (3ffe:b00:c18:1::10)  347.315 ms  417.856 ms
467.75 ms

A another machine:
traceroute to 6bone.net (3ffe:b00:c18:1::10) from 3ffe:b00:c18::77, 30
hops max, 16 byte packets
 1  rap.ipv6.viagenie.qc.ca (3ffe:b00:c18:1:290:27ff:fe17:fc0f)  169.623
ms  170.177 ms  171.894 ms
 2  www.6bone.net (3ffe:b00:c18:1::10)  169.717 ms  170.59 ms  169.922
ms

Thanks for all help.

Nicolas