CLARION M10II TESTING
GETTING STARTED GUIDE
PAGE 15
3.
TESTING THE M10II
3.1
INTRODUCTION TO TESTING
1.
To test the M10II it is suggested that you connect two M10II units, one
to each of two previously isolated network segments. As the normal
traffic is generated on each segment the internal M10II table is
automatically built up on the packet transmissions of each NIC. Only
one transmission is required to create a table entry for a NIC. The
source addresses of the traffic are used to build and maintain the table
and the tables are referenced by the destination addresses of the traffic
to determine whether or not the intended receiving NICs are attached to
a particular M10II. The M10II units are shipped with the following
defaults: acknowledgment is enabled, transmit filtering is turned on,
download filtering is turned on, aging time is set to 5 minutes, loop-
sense is on, and professional addressing mode is off. The following is a
brief description of these features.
a)
M10II acknowledging enabled. This is the main M10II feature, it
refers to the data-link level re-transmission protocol. It means
that if a destination address of an intended NIC is in the local
table of the M10II, that radio will acknowledge the packet from
within the radio firmware with microsecond response time. This
feature creates a reliable link out of a wireless connection.
Without it, the burden on common transport-level protocols
would be too great to obtain substantial throughput.
b)
Transmit filtering on. When this feature is activated local traffic
will remain local. If a packet generated on a segment is
addressed to a NIC on the same segment, the M10II will not
transmit that packet. The result is that local bandwidth is
preserved and the radio must only support the total inter-segment
bandwidth. Therefore many segments, each with 10 Mbps local
bandwidth, can be connected with a 10 Mbps backbone since
each packet is not necessarily transmitted. Without it turned on,
the bandwidth of any local segments is shared by the NICs on
other remote segments, since each packet that is generated on
another segment is transferred to the local segment and vice
