Microsoft KB Archive/247102
Article ID: 247102
Article Last Modified on 3/2/2007
- Microsoft Windows 2000 Server
- Microsoft Windows 2000 Advanced Server
- Microsoft Windows 2000 Professional Edition
- Microsoft Windows 2000 Datacenter Server
This article was previously published under Q247102
This article provides information about Designated Subnet Bandwidth Manager (DSBM) advertisements and parameters.
DSBM Address Information
Contains Transmission Control Protocol/Internet Protocol (TCP/IP) and Layer 2 addresses of the DSBM and its Subnet Bandwidth Manager (SBM) priority. The priority value is used to choose among SBM candidates during the election algorithm. The higher the value, the higher the priority, and a value of zero means that the SBM is not eligible to participate in an election. The TCP/IP address is required, and is used for breaking ties. The Layer 2 address is the address of the interface on the managed segment.
Contains the refresh interval value in seconds. A value of zero means that this parameter has been omitted, and that receivers may use their own default value.
Contains the SBMDeadInterval value in seconds. If omitted or set to zero, a default value from the initial configuration should be used.
DSBM Address Information
If it wants to be the DSBM, it contains the SBM own address information.
SBM State Variables
The current DSBM TCP/IP address and priority. All TCP/IP addresses are interpreted as being in network byte order. Also, the current DSBM Layer 2 address is stored as part of this state information.
The SBM own TCP/IP address and Layer 2 address for the interface, and its own priority.
DSBM RefreshInterval in Seconds
When the DSBM is not yet elected, it is set to a default value specified as a configuration parameter.
DSBMDeadInterval in seconds
When the DSBM is not yet elected, it is initially set to a default value specified as a configuration parameter.
ListenInterval in Seconds
Configuration parameter that decides how long a SBM stays in the DetectDSBM state.
ElectionInterval in Seconds
Configuration parameter that decides how long a SBM stays in the ElectDSBM state when it has declared its candidacy. Note that for each network interface, a SBM maintains the state variables related to the election of the DSBM.
DSBM Election States
The SBM is not operational.
This should be the initial state of a SBM when it starts up. In this state, the SBM checks to see if there is already an existing DSBM on the segment.
In this state, the DSBM is already elected, and no election is occurring. The SBM remains idle on the network, monitoring the state of the DSBM.
During this state, an election is in progress.
During this state, the SBM is the DSBM.
For additional information about DSBM, click the article number below to view the article in the Microsoft Knowledge Base:
228830 Description of Subnet Bandwidth Manager (SBM) in Windows 2000
Additional query words: qos l2
Keywords: kbinfo kbnetwork KB247102