
OSI Layer Management
Appendix E
E-9
The following table lists the MAC Attributes.
Attribute:
Description:
Attrid
:
Settable: Set value
or range:
MAC Profile
status containing info about the MAC 802.4
sublayer
0
____
Group Address 1
through 8
characteristic specifying the local node's 2 or
6 byte MAC address
1
YES
Assigned
Value
Slot Time
characteristic specifying max time the MAC
station will wait for an ACK from another
station
2
YES
See MAC
spec
Maximum inter-solicit
count
characteristic specifying max times a token
passes through before a response window
opens
3
YES
See MAC
spec
Maximum non-RWR
retry limit
characteristic specifying max time a frame is
retransmitted without receiving a response
4
YES
0...7
High priority token
hold time
characteristic specifying max time a station
can transmit at an access class
5
YES
See MAC
spec
Priority 4 token hold
time
characteristic specifying max time taken for
a token of access class 4 to rotate around
logical ring
6
YES
See MAC
spec
Priority 2 token hold
time
characteristic specifying max time taken for
a token of access class 2 to rotate around
logical ring
7
YES
See MAC
spec
Priority 0 token hold
time
characteristic specifying max time taken for
a token of access class 0 to rotate around
logical ring
8
YES
See MAC
spec
Target rotation time
for ring maintenance
characteristic specifying ring maintenance
timer
9
YES
See MAC
spec
Ring maintenance
initial value
characteristic specifying ring maintenance
timer initial value upon entry into the ring
10
YES
See MAC
spec
In Ring Desired
characteristic specifying if station should be
participant in the ring or not
11
YES
1 (TRUE) or
2 (FALSE)
Number of who
follows query
counter of number of times
who follows
frame has been transmitted
12
____
____
Token pass failures
counter of number of times tokenpass timer
has expired
13
____
____
solicit any
counter of times frame soliciting all potential
successors has been sent
14
____
____
Number of
successors
counter of times no successor has been
found
15
____
____
Unexpected frames
counter of unexpected frames received
16
____
____
MAC Attributes
Содержание PLC-5 MAP/OSI
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Страница 4: ...Table of Contents iii OSI Layer Management E 1...
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