Cabletron Systems Netlink FRX8000 User Manual page 171

Rcv Ack Timer - T2
Inactivity Timer - Ti
LPDUs before Ack - N3
Configuring SNA
The link station will reset
A REJ (Reject) LPDU, provided a Command LPDU with P bit set to
outstanding.
A Response LPDU with the
An Information or Supervisory LPDU with an N
received and less than or equal to the line station's V
LPDU with bit set to
P
If additional LPDUs are set from the remote link station after the local station has reset
, the timer will be restarted if acknowledgments of or responses to those LPDUs are
T1
outstanding. If no acknowledgments/responses are outstanding, the link station will
start the inactivity timer. (See "Reply Timer - T1" later.)
If expires and acknowledgments/responses are still outstanding, the link station
T1
will send one of the following, then restart T1:
A Supervisory LPDU with the
status.
Any Unnumbered LPDUs that were not responded to the first time they were
sent.
If acknowledgments/responses are still outstanding after N2 tries (see that entry
on page 11-18), the link station will declare the link inoperative.
The value specified for
layer (e.g., queuing).
is used by the link station to delay sending an acknowledgment of a received Infor-
mation LPDU. The timer is started when the LPDU is received and reset when the
acknowledgment is sent. If the timer expires before the acknowledgment is sent, it
must be sent as soon as possible.
is used by the link station to detect an inoperative condition in either the remote link
station or the transmission medium. The timer will be started if
one of the reasons listed under "
been sent by the remote link station, and there are no outstanding acknowledgments
or responses from the local link station.
If the local station does not receive an LPDU before
an LPDU with the bit set to
P
proceeds as described under "
is the number of Information LPDUs that will be received before sending an acknowl-
edgment. This parameter is used in conjunction with
traffic. A counter is initialized to
sequential Information LPDU is received. When the counter reaches
edgment is sent.
when it receives one of these:
T1
bit set to
F B '1'
is not outstanding.
B'1'
bit set to
P
should allow for any delays introduced by the MAC sub-
T1
Reply Timer - T1
to solicit the remote station's status. Recovery then
B'1'
" earlier.
Reply Timer - T1
, and will be decremented by one each time a valid
N3
.
greater than the last N
(R)
, provided a Command
(S)
to solicit remote link station
B'1'
has been reset (for
T1
" earlier), and additional LPDUs have
expires, the station must send
Ti
to allow stations to reduce
T2
0
is not
B'1'
(R)
an acknowl-
11-23