GLOBAL CATALOG It is a service
responsible for maintaining information about the objects and serving the
requests made by the users by providing the location of the object.
Global Catalog
runs on the port number 3268.
All types of
queries are first heard on this port number and forward the query to port
no.389 (LDAP’s).Maintains the complete information about the objects within the
same domain and partial information about other domains.
GC communicates
to infrastructure master.
If DC & ADC
are located in the same location only one GC is enough.
If the DC&ADC
are located remotely to avoid network traffic we need to configure ADC as GC
Infrastructure
master contacts global catalog for obtaining the updates about user & group
membership and universal group membership.
The primary
functions of GC
To maintain universal group membership
information, to easily locate the objects with in the AD
Configuring a Global catalog server.
Either on ADC or
on Child DC
>Start >program>admin tools> ADSS> expand sites
>default first site>server>
On NTDS right click> properties>check the box Global Catalog.
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