Select the product you need help with
- Internet Explorer
- Windows Phone
- More products
Information About Designated Subnet Bandwidth Manager Advertisements and Parameters
Article ID: 247102 - View products that this article applies to.
This article was previously published under Q247102
This article provides information about Designated Subnet Bandwidth Manager (DSBM) advertisements and parameters.
DSBM Address InformationContains 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.
Refresh IntervalContains 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.
SBMDeadIntervalContains the SBMDeadInterval value in seconds. If omitted or set to zero, a default value from the initial configuration should be used.
DSBM Address InformationIf it wants to be the DSBM, it contains the SBM own address information.
SBM State Variables
LocalDSBMAddrInfoThe 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.
OwnAddrInfoThe SBM own TCP/IP address and Layer 2 address for the interface, and its own priority.
DSBM RefreshInterval in SecondsWhen the DSBM is not yet elected, it is set to a default value specified as a configuration parameter.
DSBMDeadInterval in secondsWhen the DSBM is not yet elected, it is initially set to a default value specified as a configuration parameter.
ListenInterval in SecondsConfiguration parameter that decides how long a SBM stays in the DetectDSBM state.
ElectionInterval in SecondsConfiguration 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
DOWNThe SBM is not operational.
DetectDSBMThis 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.
IdleIn 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.
ElectDSBMDuring this state, an election is in progress.
I_AM_DSBMDuring 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:
(http://support.microsoft.com/kb/228830/EN-US/ )Description of Subnet Bandwidth Manager (SBM) in Windows 2000