Some networking folks have asked me for assistance in investigating
how to configure a CISCO VPN 3000 concentrator to do authentication
against an LDAP server. They pointed me at a document entitled:

CISCO VPN 3000 SERIES CONCENTRATORS
Configuring an External Server for VPN Concentrator User
Authorization

which, while enumerating the possible attributes, does not seem to
provide an actual LDAP schema file. Is there a downloadable schema
file somewhere, or do I really have to create the file manually?

We're currently using OpenLDAP, and the schema definitions for that
look something like:

attributetype ( 1.3.6.1.4.1.9321.4.1.1
NAME ( 'urlTarget' ) SUP name )

attributetype ( 1.3.6.1.4.1.9321.4.1.2
NAME ( 'orderWithinParent' )
DESC 'attribute to represent the ordering of items within a
menu'
EQUALITY numericStringMatch
SYNTAX 1.3.6.1.4.1.1466.115.121.1.27 )

objectclass ( 1.3.6.1.4.1.9321.3.1.3
NAME 'menuTree'
SUP groupOfNames
MUST ( displayName )
MAY ( labeledURI $ orderWithinParent $ urlTarget ) )