BRIDGE MIB RFC4188 (obsolete RFC1493)
This RFC 4188 defines those objects needed for the management
of a bridging entity operating in the transparent mode, as well as some
objects applicable to all types of bridges.
This MIB is used by the Spanning Tree Map plugin available with LoriotPro.
View of the MIB in the LoriotPro MIB tree
dot1dbase
dot1dBaseBridgeAddress
The MAC address used by this bridge when it must be
referred to in a unique fashion. It is recommended that this be the numerically
smallest MAC address of all ports that belong to this bridge. However
it is only required to be unique.When concatenated with dot1dStpPriority
a unique Bridge Identifier is formed which is used in theSpanning Tree
Protocol.
dot1dBaseNumPorts
The number of ports controlled by this bridging entity.
dot1dBaseType
Indicates what type of bridging this bridge can perform.
If a bridge is actually performing a certain type of bridging this will
be indicated by entries in the port table for the given type.
dot1dBasePortTable
A table that contains generic information aboutevery
port that is associated with this bridge. Transparent, source-route, and
srt ports areincluded.
dot1dBasePortEntry
dot1dBasePort |
The port number of the port for which this entry contains
bridge management information. |
dot1dBasePortIfIndex |
The value of the instance of the ifIndex object,defined
in MIB-II, for the interface corresponding to this port. |
dot1dBasePortCircuit |
For a port which (potentially) has the same valueof
dot1dBasePortIfIndex as another port on thesame bridge, this object contains
the name of an object instance unique to this port. For example,in the
case where multiple ports correspond one-to-one with multiple X.25 virtual
circuits, thisvalue might identify an (e.g., the first) object instance
associated with the X.25 virtual circuitcorresponding to this port. For
a port which has a unique value ofdot1dBasePortIfIndex, this object can
have the value { 0 0 }. |
dot1dBasePortDelayExceededDiscards |
The number of frames discarded by this port due to excessive
transit delay through the bridge. It is incremented by both transparent
and source route bridges. |
dot1dBasePortMtuExceededDiscards |
The number of frames discarded by this port due to an
excessive size. It is incremented by both transparent and source route
bridges. |
dot1dstp
dot1dStpProtocolSpecification
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.
dot1dStpPriority
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.
dot1dStpTimeSinceTopologyChange
The time (in hundredths of a second) since the last
time a topology change was detected by the bridge entity.
dot1dStpTopChanges
The total number of topology changes detected by this
bridge since the management entity was last reset or initialized.
dot1dStpDesignatedRoot
The bridge identifier of the root of the spanning tree
as determined by the Spanning Tree Protocol as executed by this node.
This value is used as the Root Identifier parameter in all Configuration
Bridge PDUs originated by this node.
dot1dStpRootCost
The cost of the path to the root as seen from this bridge.
dot1dStpRootPort
The port number of the port which offers the lowest
cost path from this bridge to the root bridge.
dot1dStpMaxAge
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 this bridge is
currently using.
dot1dStpHelloTime
The amount of time between the transmission of Configuration
bridge PDUs by this node 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 that this bridge is currently using.
dot1dStpHoldTime
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.
dot1dStpForwardDelay
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 underway, to age all dynamic entries in the Forwarding Database.
[Note that this value is the one that this bridge is currently using,
in contrast to dot1dStpBridgeForwardDelay which is the value that this
bridge and all others would start using if/when this bridge were to become
the root.]
dot1dStpBridgeMaxAge
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.
dot1dStpBridgeHelloTime
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.
dot1dStpBridgeForwardDelay
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.
dot1dStpPortTable
A table that contains port-specific information for
the Spanning Tree Protocol.
dot1dStpPortEntry
A list of information maintained by every port about
the Spanning Tree Protocol state for that port.
dot1dStpPort |
The port number of the port for which this entry contains
Spanning Tree Protocol management information. |
dot1dStpPortPriority |
The value of the priority field which is contained in
the first (in network byte order) octet of the (2 octet long) Port ID.
The other octet of the Port ID is given by the value of dot1dStpPort. |
dot1dStpPortState |
The port's current state as defined by application of
the Spanning Tree Protocol. This state controls what action a port takes
on reception of a frame. If the bridge has detected a port that is malfunctioning
it will place that port into the broken(6) state. For ports which are
disabled (see dot1dStpPortEnable), this object will have a value of disabled(1).
The values are 1 disabled, 2 blocking, 3 listenning, 4 learning, 5 forwarding,
6 broken) |
dot1dStpPortEnable |
|
dot1dStpPortPathCost |
The contribution of this port to the path cost of paths
towards the spanning tree root which include this port. 802.1D-1990 recommends
that the default value of this parameter be in inverse proportion to the
speed of the attached LAN. |
dot1dStpPortDesignatedRoot |
The unique Bridge Identifier of the Bridge recorded
as the Root in the Configuration BPDUs transmitted by the Designated Bridge
for the segment to which the port is attached. |
dot1dStpPortDesignatedCost |
The path cost of the Designated Port of the segment
connected to this port. This value is compared to the Root Path Cost field
in received bridge PDUs. |
dot1dStpPortDesignatedBridge |
The Bridge Identifier of the bridge which this port
considers to be the Designated Bridge for this port's segment. |
dot1dStpPortDesignatedPort |
The Port Identifier of the port on the Designated Bridge
for this port's segment. |
dot1dStpPortForwardTransitions |
The number of times this port has transitioned from
the Learning state to the Forwarding state. |
|
|
dot1dtp
dot1dTpLearnedEntryDiscards
The total number of Forwarding Database entries, which
have been or would have been learnt, but have been discarded due to a
lack of space to store them in the Forwarding Database. If this counter
is increasing, it indicates that the Forwarding Database is regularly
becoming full (a condition which has unpleasant performance effects on
the subnetwork). If this counter has a significant value but is not presently
increasing, it indicates that the problem has been occurring but is not
persistent.
dot1dTpAgingTime
The timeout period in seconds for aging out dynamically
learned forwarding information. 802.1D-1990 recommends a default of 300
seconds.
dot1dTpFdbTable
A table that contains information about unicast entries
for which the bridge has forwarding and/or filtering information. This
information is used by the transparent bridging function in determining
how to propagate a received frame.
dot1dTpFdbEntry
Information about a specific unicast MAC address for
which the bridge has some forwarding and/or filtering information.
dot1dTpFdbAddress |
A unicast MAC address for which the bridge has forwarding
and/or filtering information. |
dot1dTpFdbPort |
Either the value '0', or the port number of the port
on which a frame having a source address equal to the value of the corresponding
instance of dot1dTpFdbAddress has been seen. A value of '0' indicates
that the port number has not been learned but that the bridge does have
some forwarding/filtering information about this address (e.g. in the
dot1dStaticTable). Implementors are encouraged to assign the port value
to this object whenever it is learned even for addresses for which the
corresponding value of dot1dTpFdbStatus is not learned(3). |
dot1dTpFdbStatus |
The status of this entry. The meanings of the values
are: other(1) : none of the following. This would include the case where
some other MIB object (not the corresponding instance of dot1dTpFdbPort,
nor an entry in the dot1dStaticTable) is being used to determine if and
how frames addressed to the value of the corresponding instance of dot1dTpFdbAddress
are being forwarded. invalid(2) : this entry is not longer valid (e.g.,
it was learned but has since aged-out), but has not yet been flushed from
the table. learned(3) : the value of the corresponding instance of dot1dTpFdbPort
was learned, and is being used. self(4) : the value of the corresponding
instance of dot1dTpFdbAddress represents one of the bridge's addresses.
The corresponding instance of dot1dTpFdbPort indicates which of the bridge's
ports has this address. mgmt(5) : the value of the corresponding instance
of dot1dTpFdbAddress is also the value of an existing instance of dot1dStaticAddress. |
dot1TpPort
A table that contains information about every port that
is associated with this transparent bridge.
dot1dTpPortEntry
A list of information for each port of a transparent
bridge.
dot1dTpPort |
The port number of the port for which this entry contains
Transparent bridging management information. |
dot1dTpPortMaxInfo |
The maximum size of the INFO (non-MAC) field that this
port will receive or transmit. |
dot1dTpPortInFrames |
The number of frames that have been received by this
port from its segment. Note that a frame received on the interface corresponding
to this port is only counted by this object if and only if it is for a
protocol being processed by the local bridging function, including bridge
management frames. |
dot1dTpPortOutFrames |
The number of frames that have been transmitted by
this port to its segment. Note that a frame transmitted on the interface
corresponding to this port is only counted by this object if and only
if it is for a protocol being processed by the local bridging function,
including bridge management frames. |
dot1dTpPortInDiscards |
Count of valid frames received which were discarded
(i.e., filtered) by the Forwarding Process. |
dot1dStatic
dot1dStaticTable
A table containing filtering information configured
into the bridge by (local or network) management specifying the set of
ports to which frames received from specific ports and containing specific
destination addresses are allowed to be forwarded. The value of zero in
this table as the port number from which frames with a specific destination
address are received, is used to specify all ports for which there is
no specific entry in this table for that particular destination address.
Entries are valid for unicast and for group/broadcast addresses.
dot1dStaticEntry
Filtering information configured into the bridge by
(local or network) management specifying the set of ports to which frames
received from a specific port and containing a specific destination address
are allowed to be forwarded.
dot1dStaticAddress |
The destination MAC address
in a frame to which this entry's filtering information applies. This object
can take the value of a unicast address, a group address or the broadcast
address. |
dot1dStaticReceivePort |
Either the value '0', or the port number of the port
from which a frame must be received in order for this entry's filtering
information to apply. A value of zero indicates that this entry applies
on all ports of the bridge for which there is no other applicable entry. |
dot1dStaticAllowedToGoTo |
The set of ports to which frames received from a specific
port and destined for a specific MAC address, are allowed to be forwarded.
Each octet within the value of this object specifies a set of eight ports,
with the first octet specifying ports 1 through 8, the second octet specifying
ports 9 through 16, etc. Within each octet, the most significant bit represents
the lowest numbered port, and the least significant bit represents the
highest numbered port. Thus, each port of the bridge is represented by
a single bit within the value of this object. If that bit has a value
of '1' then that port is included in the set of ports; the port is not
included if its bit has a value of '0'. (Note that the setting of the
bit corresponding to the port from which a frame is received is irrelevant.)
The default value of this object is a string of ones of appropriate length. |
dot1dStaticStatus |
This object indicates the status of this entry. The
default value is permanent(3). other(1) - this entry is currently in use
but the conditions under which it will remain so are different from each
of the following values. invalid(2) - writing this value to the object
removes the corresponding entry. permanent(3) - this entry is currently
in use and will remain so after the next reset of the bridge. deleteOnReset(4)
- this entry is currently in use and will remain so until the next reset
of the bridge. deleteOnTimeout(5) - this entry is currently in use and
will remain so until it is aged out. |