Specifications

Hardware Reference 25
C613-03020-00 REV N
PAC DES and triple DES encryption are based on a fast 32-bit device that
complies with FIPS PUB 46, ISO DEA-1 and ANSI X3.92 standards.
Figure 22: Typical hardware compression ratios by file type
Dual mode Throughput of an encrypted link can be dramatically increased by using data
compression. To support this, ECPACs provide a dual mode that allows
combined compression and encryption operations. Data compression occurs
before encryption, to that the compression phase has the best opportunity to
find non-random data.
Adding compression to an encrypted link increases line throughput.
Compression reduces the amount of data to be encrypted and transferred over
the network, so less system and network link bandwidth is required for a given
amount of data. This makes the dual operation very effective where encryption
is required.
Verifying installation To confirm that the PAC is installed and operating correctly, check that the
switch has recognised the it. Turn on the switch and enter the following
command to display system information:
show system
For more information about this command, see the Configuring and Monitoring
the System chapter of the Rapier Series Switch AlliedWare
®
Operating System
Software Reference.
The first part of the display shows details of the base unit and expansion
options installed in the switch (Figure 23 on page 26). There should be at least
two entries, one for the switch base unit and one for the PAC. Both the serial
number and the part name should be displayed.
0
1
2
3
4
5
6
7
Font Program Window Text Object Spread
sheet
C source EPS Bitmap TIFF
File Type
Compression Ratio
CMPRATIO