Intel ER8100STUS - Express 8100 Router, Reference Manual

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Reference.bok : Chapter03 19 Wed Apr 22 10:58:08 1998
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Frame Relay Services
Data compression
Data compression is available when communicating over Frame Relay links, to
improve the throughput on link speeds of up to 256 kbps. Typical compression
rates of 4:1 can be achieved for text data.
Both routers over the Frame Relay link must support and be configured for Frame
Relay data compression before data compression is used.
Intel Express 8100 Routers use the Stac algorithm developed by Stac Electronics
Inc. Typical compression rates of 4:1 are achieved for text data.
Data encryption
The Intel Express 8100 Router offers encryption/decryption of data being trans-
mitted over Frame Relay links. This offers security in case of interception by an
unauthorized source.
Note
Data encryption is only available in certain models of the Intel Express
8100 Router which are not available in some countries.
Data encryption over Frame Relay links uses the same encryption algorithm and
implementation as for PPP links, see
“Data Encryption”, p. 11 .
Note
Unlike PPP links, Frame Relay links are unable to detect a mismatch in
the encryption keys in the routers over the link. If the encryption keys
are wrong, data will not be un-encrypted and will contain errors (illegal
packets).
Advantages of Frame
Relay over leased line
links
Frame Relay uses standardized encapsulation of protocols and it is therefore pos-
sible to connect to third-party routers (routers from other manufacturers). When
using Frame Relay, virtual circuits are established allowing for any-to-any con-
nectivity. Both of the mentioned features are not available for a leased line.