[ofa-general] mapping IP addresses to GIDs across IP subnets

[Max Matveev]

On Wed, 30 Apr 2008 15:30:51 -0600, Jason Gunthorpe wrote:

 JG> Well, you can't just assume that a AAAA record associated with the
 JG> reverse of a IPv4 is a GID - it could be a legitimate IPv6 address.
 JG> The GID space and IPv6 space are completely distinct, despite the same
 JG> format of the address.
You can also make an administrative decision to have IB prefix to be
the same as IPv6 prefix and then IPv6 and GID becomes the same.

 JG> The only way I could see to do this with DNS is to introduce a new
 JG> record type for GIDs..

 JG> Alternatively, you could use DNS to manage a mapping table, ala the
 JG> reverse map:

 JG> 1.0.0.10.ipv4.ibta-addr. AAAA fd83:609c:bdc8:1:213:72ff:fe29:e65d
That could work too but resolver would need to be modifed to ask for
the different TLA.

max