Cabletron Systems Netlink FRX8000 User Manual page 421

Window Size
Retransmit Count
Ack Timeout Bias
Local Ack Timeout
Resequence Timeout
DB Maintenance Security
Low Speed Trunk Balancing
Upgrade in Progress
System Files
A value of greater than 100 simply gives this more weight compared to the allocation
2
values configured for other trunk traffic.
Do not change the values for
without first discussing the reason with Cabletron Systems Tech-
nical Support.
is the maximum number of unacknowledged packets allowed from the source DTE to
destination DTE PPM application.
is the number of times an acknowledgment is requested (by retransmitting the packet)
if the acknowledgment timer (see next item) has expired without receipt of a packet.
is used to set a value for the acknowledgment timer. After a packet is sent, the Ack
timer is started. If the timer expires before the packet has been acknowledged, a
recovery procedure is initiated. The software computes the Ack timer value by reading
a smoothed average of the measured round trip time (RRT), a smoothed average of the
standard deviation of RRT, and the Ack Timeout Bias.
A low Ack Timeout Bias allows for quick recovery of missing packets at level 3, but
does not allow much time for error recovery by level 2 trunk protocol. A low bias
(e.g., ) is recommended or fast trunks. A somewhat higher bias can be used for
5
standard trunks over reliable lines. A high bias (e.g.,
trunks over noisy lines, to give level 2 enough recovery time.
is the maximum period of time the node will wait to acknowledge a request. If the
request is acknowledged before this time runs out, the acknowledgment will be
embedded in the packet; otherwise, it will be sent in a separate packet.
is used when a source node has more than one path over which to send packets to a
destination node. If a packet arrives out of order at the destination node, it is held until
either the proper packet arrives or the timeout occurs.
turns the database maintenance password prompt on or off. If security is on, either the
database maintenance or high-level operations password must be entered to gain
access to or
Maintenance
causes the node software to consider all parallel trunks when balancing a load. (See
"Parallel Trunks" on page 7-1.) The software does not normally consider any parallel
trunk that is less than half the speed of the fastest parallel trunk. Unless necessary, do
not enable this parameter.
is used during the migration of a Nucleus 7000 network to Release 5.0 from an earlier
release. (Release 5.0 is necessary for N7000 compatibility with FRX8000.) If the
network has Release 5.0 and pre-5.0 nodes, this parameter must be set to
BAG Param 1
operations.
Initialize File
and
BAG Param 2
) should be used for standard
10-15
Y
. Once all
E-5