the maximum value."
REFERENCE "IEEE 802.1D-1998: clause 8.5.5.3"
::= { dot1dStpPortEntry 5 }
dot1dStpPortDesignatedRoot OBJECT-TYPE
SYNTAX BridgeId
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"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."
REFERENCE
"IEEE 802.1D-1998: clause 8.5.5.4"
::= { dot1dStpPortEntry 6 }
dot1dStpPortDesignatedCost OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"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."
REFERENCE
"IEEE 802.1D-1998: clause 8.5.5.5"
::= { dot1dStpPortEntry 7 }
dot1dStpPortDesignatedBridge OBJECT-TYPE
SYNTAX BridgeId
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The Bridge Identifier of the bridge that this
port considers to be the Designated Bridge for
this port’s segment."
REFERENCE
"IEEE 802.1D-1998: clause 8.5.5.6"
::= { dot1dStpPortEntry 8 }
dot1dStpPortDesignatedPort OBJECT-TYPE
SYNTAX OCTET STRING (SIZE (2))
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The Port Identifier of the port on the Designated
Bridge for this port’s segment."
REFERENCE
"IEEE 802.1D-1998: clause 8.5.5.7"
::= { dot1dStpPortEntry 9 }
dot1dStpPortForwardTransitions OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of times this port has transitioned
from the Learning state to the Forwarding state."
::= { dot1dStpPortEntry 10 }
dot1dStpPortPathCost32 OBJECT-TYPE
SYNTAX Integer32 (1..200000000)
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The contribution of this port to the path cost of
paths towards the spanning tree root which include
this port. 802.1D-1998 recommends that the default
value of this parameter be in inverse proportion to
the speed of the attached LAN.
This object replaces dot1dStpPortPathCost to support
IEEE 802.1t."
REFERENCE
"IEEE 802.1t clause 8.10.2, Table 8-5."
::= { dot1dStpPortEntry 11 }
-- ---------------------------------------------------------- --
-- the dot1dTp subtree
-- ---------------------------------------------------------- --
-- Implementation of the dot1dTp subtree is optional. It is
-- implemented by those bridges that support the transparent
-- bridging mode. A transparent or SRT bridge will implement
-- this subtree.
-- ---------------------------------------------------------- --
dot1dTpLearnedEntryDiscards OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The total number of Forwarding Database entries that
have been or would have been learned, but have been
discarded due to a lack of storage space in the
Forwarding Database. If this counter is increasing, it
indicates that the Forwarding Database is regularly
becoming full (a condition that 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."
REFERENCE
"IEEE 802.1D-1998: clause 14.7.1.1.3"
::= { dot1dTp 1 }
dot1dTpAgingTime OBJECT-TYPE
SYNTAX Integer32 (10..1000000)
UNITS "seconds"
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The timeout period in seconds for aging out
dynamically-learned forwarding information.
802.1D-1998 recommends a default of 300 seconds."
REFERENCE
"IEEE 802.1D-1998: clause 14.7.1.1.3"
::= { dot1dTp 2 }
-- ---------------------------------------------------------- --
-- The Forwarding Database for Transparent Bridges
-- ---------------------------------------------------------- --
dot1dTpFdbTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dot1dTpFdbEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"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."
::= { dot1dTp 3 }
dot1dTpFdbEntry OBJECT-TYPE
SYNTAX Dot1dTpFdbEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Information about a specific unicast MAC address
for which the bridge has some forwarding and/or
filtering information."
INDEX { dot1dTpFdbAddress }
::= { dot1dTpFdbTable 1 }
Dot1dTpFdbEntry ::=
SEQUENCE {
dot1dTpFdbAddress
MacAddress,
dot1dTpFdbPort
Integer32,
dot1dTpFdbStatus
INTEGER
}
dot1dTpFdbAddress OBJECT-TYPE
SYNTAX MacAddress
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"A unicast MAC address for which the bridge has
forwarding and/or filtering information."
REFERENCE
"IEEE 802.1D-1998: clause 7.9.1, 7.9.2"
::= { dot1dTpFdbEntry 1 }
dot1dTpFdbPort OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"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)."
::= { dot1dTpFdbEntry 2 }
dot1dTpFdbStatus OBJECT-TYPE
SYNTAX INTEGER {
other(1),
invalid(2),
learned(3),
self(4),
mgmt(5)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"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 no 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."
::= { dot1dTpFdbEntry 3 }
-- ---------------------------------------------------------- --
-- Port Table for Transparent Bridges
-- ---------------------------------------------------------- --
dot1dTpPortTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dot1dTpPortEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A table that contains information about every port that
is associated with this transparent bridge."
::= { dot1dTp 4 }
dot1dTpPortEntry OBJECT-TYPE
SYNTAX Dot1dTpPortEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A list of information for each port of a transparent
bridge."
INDEX { dot1dTpPort }
::= { dot1dTpPortTable 1 }
Dot1dTpPortEntry ::=
SEQUENCE {
dot1dTpPort
Integer32,
dot1dTpPortMaxInfo
Integer32,
dot1dTpPortInFrames
Counter32,
dot1dTpPortOutFrames
Counter32,
dot1dTpPortInDiscards
Counter32
}
dot1dTpPort OBJECT-TYPE
SYNTAX Integer32 (1..65535)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The port number of the port for which this entry
contains Transparent bridging management information."
::= { dot1dTpPortEntry 1 }
-- It would be nice if we could use ifMtu as the size of the
-- largest INFO field, but we can’t because ifMtu is defined
-- to be the size that the (inter-)network layer can use, which
-- can differ from the MAC layer (especially if several layers
-- of encapsulation are used).
dot1dTpPortMaxInfo OBJECT-TYPE
SYNTAX Integer32
UNITS "bytes"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The maximum size of the INFO (non-MAC) field that
this port will receive or transmit."
::= { dot1dTpPortEntry 2 }
dot1dTpPortInFrames OBJECT-TYPE
SYNTAX Counter32
UNITS "frames"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"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."
REFERENCE
"IEEE 802.1D-1998: clause 14.6.1.1.3"
::= { dot1dTpPortEntry 3 }
dot1dTpPortOutFrames OBJECT-TYPE
SYNTAX Counter32
UNITS "frames"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"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."
REFERENCE
"IEEE 802.1D-1998: clause 14.6.1.1.3"
::= { dot1dTpPortEntry 4 }
dot1dTpPortInDiscards OBJECT-TYPE
SYNTAX Counter32
UNITS "frames"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Count of received valid frames that were discarded
(i.e., filtered) by the Forwarding Process."
REFERENCE
"IEEE 802.1D-1998: clause 14.6.1.1.3"
::= { dot1dTpPortEntry 5 }
-- ---------------------------------------------------------- --
-- The Static (Destination-Address Filtering) Database
-- ---------------------------------------------------------- --
-- Implementation of this subtree is optional.
-- ---------------------------------------------------------- --
dot1dStaticTable OBJECT-TYPE
SYNTAX SEQUENCE OF Dot1dStaticEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"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."
REFERENCE
"IEEE 802.1D-1998: clause 14.7.2"
::= { dot1dStatic 1 }
dot1dStaticEntry OBJECT-TYPE
SYNTAX Dot1dStaticEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"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."
REFERENCE
"IEEE 802.1D-1998: clause 14.7.2"
INDEX { dot1dStaticAddress, dot1dStaticReceivePort }
::= { dot1dStaticTable 1 }
Dot1dStaticEntry ::=
SEQUENCE {
dot1dStaticAddress MacAddress,
dot1dStaticReceivePort Integer32,
dot1dStaticAllowedToGoTo OCTET STRING,
dot1dStaticStatus INTEGER
}
dot1dStaticAddress OBJECT-TYPE
SYNTAX MacAddress
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"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."
REFERENCE
"IEEE 802.1D-1998: clause 7.9.1, 7.9.2"
::= { dot1dStaticEntry 1 }
dot1dStaticReceivePort OBJECT-TYPE
SYNTAX Integer32 (0..65535)
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"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."
::= { dot1dStaticEntry 2 }
dot1dStaticAllowedToGoTo OBJECT-TYPE
SYNTAX OCTET STRING (SIZE (0..512))
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"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.
The value of this object may exceed the required minimum
maximum message size of some SNMP transport (484 bytes,
in the case of SNMP over UDP, see RFC 3417, section 3.2).
SNMP engines on bridges supporting a large number of
ports must support appropriate maximum message sizes."
::= { dot1dStaticEntry 3 }
dot1dStaticStatus OBJECT-TYPE
SYNTAX INTEGER {
other(1),
invalid(2),
permanent(3),
deleteOnReset(4),
deleteOnTimeout(5)
}
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"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."
::= { dot1dStaticEntry 4 }
-- ---------------------------------------------------------- --
-- Notifications for use by Bridges
-- ---------------------------------------------------------- --
-- Notifications for the Spanning Tree Protocol
-- ---------------------------------------------------------- --
newRoot NOTIFICATION-TYPE
-- OBJECTS { }
STATUS current
DESCRIPTION
"The newRoot trap indicates that the sending agent has
become the new root of the Spanning Tree; the trap is
sent by a bridge soon after its election as the new
root, e.g., upon expiration of the Topology Change Timer,
immediately subsequent to its election. Implementation
of this trap is optional."