>> MIB - Management Information Base

>> Table: dot1dStp - (.1.3.6.1.4.1.272.4.8.2)

dot1dStp
OIDNameTypeAccess
.1ProtocolSpecificationENUMR
.2PriorityINTEGERRW
.3TimeSinceTopologyChangeTimeTicksR
.4TopChangesCounterR
.5DesignatedRootBridgeIdR
.6RootCostINTEGERR
.7RootPortINTEGERR
.8MaxAgeTimeoutR
.9HelloTimeTimeoutR
.10HoldTimeINTEGERR
.11ForwardDelayTimeoutR
.12BridgeMaxAgeINTEGERRW
.13BridgeHelloTimeINTEGERRW
.14BridgeForwardDelayINTEGERRW
.16BridgePPPForwardDelayINTEGERRW

ProtocolSpecification
An indication of what version of the Spanning
Tree Protocol is being run.  The value
'decLb100(2)' indicates the DEC LANbridge 100
Spanning Tree protocol.  IEEE 802.1d
implementations will return 'ieee8021d(3)'.  If
future versions of the IEEE Spanning Tree Protocol
are released that are incompatible with the
current version a new value will be defined.
Enumerations:
  • unknown (1)
  • decLb100 (2)
  • ieee8021d (3)
Priority
The value of the write-able portion of the Bridge
ID, i.e., the first two octets of the (8 octet
long) Bridge ID.  The other (last) 6 octets of the
Bridge ID are given by the value of
dot1dBaseBridgeAddress.
TimeSinceTopologyChange
The time (in hundredths of a second) since the
last time a topology change was detected by the
BRICK.
TopChanges
The total number of topology changes detected by
the BRICK since the management entity was last
reset or initialized.
DesignatedRoot
The bridge identifier of the root of the spanning tree
as determined by the Spanning Tree Protocol as executed
by the BRICK. This value is used as the Root Identifier
parameter in all Configuration Bridge PDUs originated
by this BRICK.
RootCost
The cost of the path to the root as seen from
the BRICK.
RootPort
The port number of the port which offers the
lowest cost path from this bridge to the root
bridge.
MaxAge
The maximum age of Spanning Tree Protocol
information learned from the network on any port
before it is discarded, in units of hundredths of
a second.  This is the actual value that the 
BRICK is currently using.
HelloTime
The amount of time between the transmission of 
Configuration bridge PDUs by the BRICK on any port when
it is the root of the spanning tree or trying to become so,
in units of hundredths of a second. This is the actual 
value currently being used.
HoldTime
This time value determines the interval length
during which no more than two Configuration bridge
PDUs shall be transmitted by this node, in units
of hundredths of a second.
ForwardDelay
This time value, measured in units of hundredths of a
second, controls how fast a port changes its spanning
state when moving towards the Forwarding state. The
value determines how long the port stays in each of the
Listening and Learning states, which precede the 
Forwarding state. This value is also used, when a topology
change has been detected and is under way, to age all 
dynamic entries in the Forwarding Database.
[Note that this value is the one that is currently being
used, in contrast to dot1dStpBridgeForwardDelay which is
the value that this BRICK and all others would start 
using if/when this BRICK were to become the root.]
BridgeMaxAge
The value that all bridges use for MaxAge when
this bridge is acting as the root.  Note that
802.1D-1990 specifies that the range for this
parameter is related to the value of
dot1dStpBridgeHelloTime. The granularity of this
timer is specified by 802.1D-1990 to be 1 second.
An agent may return a badValue error if a set is
attempted to a value which is not a whole number
of seconds.
BridgeHelloTime
The value that all bridges use for HelloTime when
this bridge is acting as the root.  The
granularity of this timer is specified by 
802.1D-1990 to be 1 second.  An agent may return a
badValue error if a set is attempted to a value
which is not a whole number of seconds.
BridgeForwardDelay
The value that all bridges use for ForwardDelay
when this bridge is acting as the root.  Note that
802.1D-1990 specifies that the range for this
parameter is related to the value of
dot1dStpBridgeMaxAge.  The granularity of this
timer is specified by 802.1D-1990 to be 1 second.
An agent may return a badValue error if a set is
attempted to a value which is not a whole number
of seconds.
BridgePPPForwardDelay
This is the forward delay for PPP interfaces.


Copyright ©2003 by BinTec Access Networks GmbH