DGS-1210-24-AX

The Bridge-Identifier as used in the
Spanning Tree
Protocol to uniquely identify a bridge. Its first two
octets (in network byte order) contain a priority
value and its last 6 octets contain the MAC address
used to refer to a bridge in a unique fashion
(typically, the numerically smallest MAC address
of all ports on the bridge).
Several objects in this MIB module represent values of
timers used by the Spanning Tree Protocol. In this
MIB, these timers have values in units of hundreths of
a second (i.e. 1/100 secs).
These timers, when stored in a Spanning Tree Protocol's
BPDU, are in units of 1/256 seconds. Note, however,
that 802.1D-1990 specifies a settable granularity of
no more than 1 second for these timers. To avoid
ambiguity, a data type is defined here as a textual
convention and all representation of these timers
in this MIB module are defined using this data type. An
algorithm is also defined for converting between the
different units, to ensure a timer's value is not distorted by multiple conversions.

The Actor or Partner Key value (0..65535).

Defines how a Port Channel does channeling.
lacp(1) - place the port into passive
negotiation state, in which the
port waits for its peer to
initiate negotiation.
static(2) - force the port to enable
channeling.
disable(3) - channeling is disabled.

Each octet within this value 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'.

A STP timer in units of 1/100 seconds

To convert a Timeout value into a value in units of
1/256 seconds, the following algorithm should be used:

b = floor( (n * 256) / 100)

where:
floor = quotient [ignore remainder]
n is the value in 1/100 second units
b is the value in 1/256 second units
To convert the value from 1/256 second units back to
1/100 seconds, the following algorithm should be used:

n = ceiling( (b * 100) / 256)

where:
ceiling = quotient [if remainder is 0], or
quotient + 1 [if remainder is non-zero]
n is the value in 1/100 second units
b is the value in 1/256 second units

Note: it is important that the arithmetic operations are
done in the order specified (i.e., multiply first, divide
second).

A value used to index per-VLAN tables: values of 0 and
4095 are not permitted; if the value is between 1 and
4094 inclusive, it represents an IEEE 802.1Q VLAN-ID with
global scope within a given bridged domain (see VlanId
textual convention). If the value is greater than 4095
then it represents a VLAN with scope local to the
particular agent, i.e. one without a global VLAN-ID
assigned to it. Such VLANs are outside the scope of
IEEE 802.1Q but it is convenient to be able to manage them
in the same way using this MIB.