Contemporary Controls Metasys JC-MER-CXB, Руководство пользователя, Страница: 43 / 58

TD060100-0MA
43
/A or /B The
"
/A
"
switch and the
"
/B
"
switch control the way
that
ARCNET broadcast messages are handled by the
JC-MER-CXB
If neither of these switches
are defined,
the
JC-MER-CXB
sends one IP message to
each IP
address
listed
in
the configuration screen
,
for every
ARCNET broadcast message received. This
mode will
generate a lot of Ethernet traffic and can
cause Metasys
nodes to have off-line problems if any
IP address defined
in this
screen is
not present on
the network. Including one
of these two switches
causes the JC-MER-CXB to send
one broadcast message to all nodes
within the broadcast
domain of the
unit
. Additional
messages are sent to each
of the remaining devices
that do not receive the broadcast
message. The two
switches control how the broadcast
message is sent on
the Ethernet network. The "/A" switch
sends broadcast
messages to the all-ones IP address
(255.255.255.255).
The "/B" switch sends broadcast
messages to the
network directed address. The "/B" switch
should be
used on networks that do not pass all ones
broad
cast messages to all parts of a single IP network.
Ask your
network administrator which type of broadcast
message
the network supports — all ones ("/A" switch) or
network directed ("
/B
"
switch). The
"
/A
"
switch is set
as the default condition. Do not set both switches
active at
at the same time
on a single router
.
The
download
program must be run from a router
whose IP address
is listed on the configuration screen of each destination router. A
router will not accept
communication from any device whose address
is not in
the router's
configuration
screen
.
Configuration Download ( download )
Th
is
program downloads the router configuration from one router to
all of the other
JC-MER-CXB unit
s. When the
download
program is
run, it will prompt for additional information. It will also indicate
which routers were downloaded successfully. If a download
fails,
rerun the
download
program
.
Software Switches