Microsoft windows 2000 DNS manual Discovering Site specific DCs, Finish

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Send a DNS query specifying one of the criteria specific DNS host names

Does the DNS query

Quit indicating

response contain at

No

the reason

least one DC?

No

Yes

Among all DCs returned in the

Finish

DNS response is there at least

one non-pinged one?

Yes

Among all DCs returned by the DNS server, that has not been pinged yet, choose one DC based on weighted random order. Ping it. Wait for 0.1 sec and listen for responses from this and previously pinged DCs.

NoNo

Did you receive a

DC's response?

Yes

Does it match

client's

requirements?

Yes

Cache the the

result and return it to client

Finish

Discovering Site specific DCs

When a locator searches for a DC, it attempts to find one in the same site where the client is unless specified otherwise. If at the beginning of the search the locator is not aware of the client’s site, it will query a DNS server for the records of the DCs in the specified domain. Then it contacts discovered DCs and finds the site to which the client belongs. If the discovered DC is not in the same site the locator will repeat DNS query specifying the client’s site.

Windows 2000 White Paper

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Contents Windows 2000 DNS Microsoft Corporation. All rights reserved Contents Designing a DNS Namespace for the Active Directory Summary Page DNS Fundamentals Standards and Additional Reading Name Services in WindowsDraft-skwan-gss-tsig-04.txt GSS Algorithm for Tsig GSS-TSIG History of DNSHierarchy of DNS Domain Names Structure of DNSCom Edu Gov Mil Army Microsoft Int/net/orgMit Mydomain DNS and InternetDistributing the Database Zone Files and Delegation TTLMicrosoft My domain ftp Ntserver Replicating the DNS databaseQuerying the Database NEW Features of the Windows 2000 DNSName Server Resolver Root-server Gov Whitehouse.gov Time to Live for Resource Records Updating the DNS DatabaseActive Directory Storage and Replication Integration Active Directory Service Storage ModelWindows 2000 White Paper Zone Type Conversions Controlling Access to ZonesReplication Model Protocol Description Incremental Zone TransferZone Log File Dynamic UpdateMaster DNS Server Slave DNS Server Ixfr and DS IntegrationDynamic Update of DNS Records Update AlgorithmDhcp Client Mixed EnvironmentSecure Dynamic Update Statically Configured ClientRAS Client Client ReregistrationEstablishing a security context by passing security tokens Secure Dynamic Update Policy Controlling Update Access to Zones and Names DnsUpdateProxy GroupAging and Scavenging DNS Admins GroupAging and Scavenging Parameters DefaultEnableScavenging Scavenging Period DescriptionRecord Life Span Scavenging Algorithm Configuring Scavenging ParametersInteroperability Considerations Unicode Character SupportDomain Locator Finish IP/DNS Compatible Locator DNS Record Registration and Resolver RequirementsLdap.tcp.dc.msdcs.DnsDomainName Kerberos.tcp.dc.msdcs.DnsDomainName IP/DNS DC Locator Algorithm Finish Discovering Site specific DCsCaching Resolver Fully-Qualified Query Name ResolutionUnqualified Single-Label Query Using Global Suffix Search OrderUnqualified Multi-Label Query Using Primary and Per-adapter Domain NamesUnqualified Single-Label Query Scenarios Name Resolution ScenariosMicrosoft Implementation of Negative Caching Fully-Qualified Query ScenariosDNS Server List Management Negative CachingDNS Manager Administrative ToolsWMI Support for DNS Server Administration Using UTF-8 Characters Format Interoperability IssuesUsing Wins and Winsr Records Utilization DNS Server PerformanceReceiving Non-RFC Compliant Data Hardware components Sizing Server Capacity PlanningChoosing Names Internet Access ConsiderationsWindows 2000 White Paper Windows 2000 White Paper Windows 2000 White Paper VPN Com Yyy.com Zzz.com Windows 2000 White Paper Primary Zone YYY corporation ZZZ corporation VPN Firewall Computer Names Characters in NamesPer-Adapter Naming Full computer nameIntegrating ADS with Existing DNS Structure Domain name and sites. Active Directory domain name DNS Migration to Windows 2000 DNSPartitioning, and Replication Choosing your Zones Deploying DNS to Support Active DirectoryWins Referral Using Automatic ConfigurationIxfr Ixfr For More InformationWindows 2000 White Paper