repdiag
repdiag
by default, replication groups use a full mesh topology, which means that every member in a group replicates with every other member.
KCC comes under Active Directory Section.KCC:Knowledge Consistency Checker.As soon as You install the second domain controller in a forest, a process called the knowledge consistency checker begins running on every domain controller. The KCC is responsible for generating the replication topology and dynamically handling the changes and failures within the replication topology.By default the KCC on every domain controller recalculates the replication topology for every 15mins.The more the replication topology, the more the processing power it takes to perform.Within a Site, a Windows server 2003 service known as the KCC automatically generates a topology for replication among the domain controllers in the domain using a ring structure.Th Kcc is a built in process that runs on all domain controllers.The KCC analyzes the replication topology within a site every 15 minute to ensure that it still works. If you add or remove a domain controller from the network or a site, the KCC reconfigures the topology to relect the change.AnswerKCC is Knowledge Consistency Checker, which creates the connection object that links the DCs into common replication topology and dictates the replication routes between one DC to another in Active Directory forest.
Windows 2000 Domain controllers each create Active Directory Replication connection objects representing inbound replication from intra-site replication partners. For inter-site replication, one domain controller per site has the responsibility of evaluating the inter-site replication topology and creating Active Directory Replication Connection objects for appropriate bridgehead servers within its site. The domain controller in each site that owns this role is referred to as the Inter-Site Topology Generator (ISTG). Krishna Pothula Answer: Intersite Topology Generator (ISTG), which is responsible for the connections among the sites. By default Windows 2003 Forest level functionality has this role.
Windows 2000 Domain controllers each create Active Directory Replication connection objects representing inbound replication from intra-site replication partners. For inter-site replication, one domain controller per site has the responsibility of evaluating the inter-site replication topology and creating Active Directory Replication Connection objects for appropriate bridgehead servers within its site. The domain controller in each site that owns this role is referred to as the Inter-Site Topology Generator (ISTG). Krishna Pothula Intersite Topology Generator (ISTG), which is responsible for the connections among the sites. By default Windows 2003 Forest level functionality has this role. ... Or the Distributed File System (DFS).
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the site links are created by KCCKCC and Topology GenerationThe KCC is a built-in process that runs on all domain controllers. It is a dynamic-link library that modifies data in the local directory in response to systemwide changes, which are made known to the KCC by changes to the data within Active Directory. The KCC generates and maintains the replication topology for replication within sites and between sites.The KCC has two major functions:Configures replication connections (connection objects) between domain controllers. Each connection object defines incoming replication from a replication partner. Within a site, each KCC generates its own connections. For replication between sites, a single KCC per site generates all connections between sites.Converts the connection objects that represent inbound replication to the local domain controller into the replication agreements that are actually used by the replication engine.By default, the KCC reviews and makes modifications to the Active Directory replication topology every 15 minutes to ensure propagation of data, either directly or transitively, by creating and deleting connection objects as needed. The KCC recognizes changes that occur in the environment and ensures that domain controllers are not orphaned in the replication topology.
The Knowledge Consistency Checker (KCC) is a Windows component that automatically generates and maintains the intra-site and inter-site replication topology. You can disable the KCC's automatic generation of intra-site or inter-site topology management, or both. You can use the script included in this article to automate disabling or the re-enabling of automatic inter-site topology maintenance that the KCC performs. For additional information go to http://support.microsoft.com/kb/245610
"Dual counter-rotating ring"- Page 64 Lesson 3 in your book Mr. ITT Student. :)
The KCC is a built-in process that runs on all domain controllers and generates replication topology for the Active Directory forest. The KCC creates separate replication topologies depending on whether replication is occurring within a site (intrasite) or between sites (intersite). The KCC also dynamically adjusts the topology to accommodate new domain controllers, domain controllers moved to and from sites, changing costs and schedules, and domain controllers that are temporarily unavailable.
Ring topology is the passive topology in computer networks
Topology