DAP Technology 1394, Operation Manual

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Internet Protocol version 4 (IP4)
302 Copyright © DapTechnology B.V., 2005-2019 - All Rights Reserved., 5/20/2019
automatically find IP4 Units. Adding such a Unit will create a Node Specification and Unit. The created
Node Specification will be filled automatically when possible. You probably will have to select correct
nodes for some reset segments. Make sure you have selected the IP4 node corrrectly for those reset
segments for which transaction and packets are recorded that you want to analyze. For more information
on Node Specifications, see
Protocol Settings .
General options
Mark unhandled packets
For information about this checkbox, please see
Protocol Settings .
Protocol-specific information
Enable IP4 analysis
Check this box to enable the IP4 analyzer. All protocol tabs in this dialog have such a checkbox, which
can be useful if a recording contains data from several protocols, and you are not interested in some of
these.
Ignore MS loop detection packets
While developing the IP4 analyzer at DAP Design, we sometimes made recordings containing IP packets
with an 'ether_type' value of 0x0777, which is not in any standard (yet). After some time we were informed
that this is a packet with a deliberate invalid signature that contains Microsoft specific data used to detect
loops in routed networks. Since the format of these packets is unknown, it might be useful to hide their
presence. Checking this box allows the analyzer to ignore such packets.
Units
In the Units table, one or more IP4 Units can be specified. The information in this table normally can be
found in the Configuration ROM of the IP4 node. It consists of:
Unit
Using the checkbox before each Unit in the table you can enable or disable each Unit individually for
analysis. If the box is not checked, the IP4-related transactions and packets for this Unit will be skipped.
Node Spec.
A Unit is part of a node. As explained before, nodes are specified using Node Specifications. The number
in this column corresponds to the Node-Specification numbers of the table in the upper part of the dialog.
IP number
The IP number of the unit. Any packet sent to or from this node with another IP address is assumed to
have been routed through this unit. Such routed packets will have a 'R->' prepended to the source or
destination address in the tree view. For this field there are three options:
· Manually specify the IP number of the unit (use a format like w.x.y.z.)
·
Let the protocol analyzer use this first IP sent to or from this unit (select '(first)' from the combo box)
·
Let the protocol analyzer find the IP number by looking only at ARP packets (select '(detect)' from the
combo box)
FIFO address
This is the address in the node where IP4 packets should be sent. This value can be automatically
detected using ARP packets (use value 'detect') or manually entered. Note that any value entered is
assumed to be in a hexadecimal notation.