This optional parameter allows you to define a custom SQL
query to find an available address or prefix. The default
is:
select TIME_STAMP, YIADDR, SUBNETMASK, DNSSERVER from RADPOOL where POOL='%0'
and STATE=0 order by TIME_STAMP
The variables are
replaced as follows:
- %0 by the pool hint
- %1 by the user name
- %2 with the lease expiry time
- %3 by SQL quoted NasId value
Tip
You can get a substantial speedup during address
allocation with MySQL by adding 'limit 1' to the end of the FindQuery when
using a database engine that supports LIMIT clause.
This example
uses NAS_ID column to allocate an IPv6 prefix from the range assigned to
the user's NAS. The pool has been previously initialised with NAS_IDs
belonging to known NASes.
# Our NASes all send NAS-IPv6-Address, e.g. 2001:db8:2::2
NasId %{NAS-IPv6-Address}
FindQuery select TIME_STAMP, YIADDR, SUBNETMASK, DNSSERVER from RADPOOL
where POOL='%0' and STATE=0 and NAS_ID=%3 order by TIME_STAMP
