What is (RODC) – Read Only Domain Controllers

RODC are used in non secure areas (Where the physical server can be compromised). You can establish which credentials can be cached on an RODC (Computer and User objects). When a user or computer authenticates against an RODC, the RODC will authenticate the user against a writable DC. If the object is allowed to be…

How to Generator Inter-site Topology And Site link Transitivity

ISTG is responsible for generating an inbound replication connection for bridge head servers within a site. The first server in the site is responsible for ISTG If the ISTG becomes unavailable, after 60 minutes a new ISTG will take over. ISTG is responsible for determining the active bridgehead server   By default, bridge all site…

Bridgehead DC Servers

A DC within each site is elected as an Active Bridgehead server. The Active Bridgehead server is the DC which replicates with a partner Active Bridgehead server in a different site based on the site links. Replication between the bridgehead servers are based on the site link cost, frequency and schedule. AD DS elects the…

DEFAULTIPSITELINK – Rename Site Links

To determine how replication will flow between sites, we create site links which include the following components: List of sites to be included in the site link Cost – Replication between sites will take the lowest cost path Frequency – How often replication will occur over the link Schedule – What times can replication over…

What is replicated and Intersite Replication ?

Regardless of Inter or Intra-site replication – what is being replicated is the same. Replication elements are broken down into partitions. KCC Generates a replication topology for each partition. Partitions are as follows: Schema (Forest Wide) Configuration (Forest Wide) Domain (or Directory) (Domain Specific) Application (Forest Wide or Domain Specific) [Can be multiple applications]  …

Replication Protocol RPC over IP or SMTP

Intrasite replication uses RPC Over IP as it’s replication protocol. This allows for the following: Kerberos authentication Data Encryption Intrasite replication is not compressed Intersite replication can use either RPC Over IP or SMTP Intersite replication is compressed

Intrasite replication in Dcs

Replication between DCs within the same site. DCs within a site pair up with up to two replication partners Replication topology is generated by the Knowledge Consistency Checker (KCC) KCC will prevent more than 3 hops for replication, in the event of more than 3 hops, a shortcut connection is made across the topology ring….

Default-first-site-name-in-DC

After you promote your first DC in the forest, the Default-First-Site-Name site is created. All DCs in the forest are added to this site by default. You should rename this site to something logical. If you create multiple sites and assign subnets to the sites, when promoting a DC with an IP in a different…

How many users can a DC Support?

This is a relative question. A DC can handle millions and even billions of users – but that doesn’t mean your server can. You will have to measure activity on a DC based on typical usage and load on the same hardware/resources as you would in production. Based on these outcomes- you will learn what…

Domain Controllers within a Site in DCs

Consider the following when placing a DC at each site: Logins will be quicker if a DC is local WAN Link – may slow down connections to a DC at a different location LDAP Query/login scripts etc. can cause congestion on a DC. May not want to put a DC at a location where there…