Thinklogical VX640 Router Manual - Manual (Page 39)

VX640 Router Manual, Rev. F 34 November, 2013
Router. An output can connect to an input with a priority greater than, or equal to, its priority. Thus, a
priority level of 1 on an output can connect to any input (priority 1, 2, 3…).
The user must provide a table defining the priorities for each input and output of the switch matrix. This
table is in the form of a comma separated value (csv) file. This file contains the values in three columns:
Port Direction (i=input, o=output), Port Number and Port Priority. For example:
I/O Number Priority
"i", 1, 1
"i", 2, 2
"i", 3, 3
"i", 4, 1
"i", 5, 3
"o", 1, 1
"o", 2, 3
"o", 3, 2
"o" 4, 4
"o", 5, 1
Output 1 can connect to ports 1-5.
Output 2 can connect to ports 3 and 5.
Output 3 can connect to ports 2, 3, and 5.
Output 4 cannot connect to any ports.
Output 5 can connect to ports 1-5.
Note that Port Direction (i or o) is in quotes and that the table must use only the following ASCII printable
characters:
Double quotes (or speech marks), character code = 34 (")
Lower case i character code = 105 (i)
Lower case o character code = 111 (o)
Comma character code = 44 (,)
Carriage Return character code = 13 (CR)
Line Feed character code = 10 (LF)
The VX Router will interpret the Restricted Switching Table (csv file) during the boot-up. Any errors that
occur during the Restricted Switching Table interpretation process will be logged in the messages file at
the following location: var/log/messages
It is recommended that the Messages File be reviewed and any errors in the Restricted Switching Table
be corrected before implementing multiple levels of security classification domains on the same VX
Router. It is also recommended that Restricted Switching be fully tested before implementing multiple
levels of security classification domains on the same VX Router.
The Restricted Switching Table files for the VX640 Router are stored on the Controller Card at the
following location:
var/local/vxrouter/restrict/upstream.csv
var/local/vxrouter/restrict/downstream.csv
Restricted switching is disabled when Restricted Switching Table files are removed. By default, when
there are no Restricted Switching Table files, all input and output ports will have a priority of 1. All VX
Routers are shipped without Restricted Switching Table files stored on the Controller card and therefore
do not restrict any connection.