notify IPv6

[James]

Good afternoon,

I am logging all zone transfers.  I can see it transferring on IPv4 
addresses.  I can check the SOA index on the primary and secondaries to 
check for updates.

If a name server has only an IPv6 address (no IPv4) I do not see the 
transfer and the data are not updated on the secondary.  The 
documentation says "NOTIFY messages are sent to the name servers defined 
in the NS records for the zone"

If I put IPv6 addresses in the also-notify statement there is no update 
on the IPv6 addresses.
The documentation includes the IPv6 option:
"also-notify [ port <integer> ] [ source ( <ipv4_address> | * ) ] [ 
source-v6 ( <ipv6_address> | * ) ] { ( <remote-servers> | <ipv4_address> 
[ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> 
] [ tls <string> ]; ... }"

Is this my mistake or bind's?


James.