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Avaya Configuring Data Compression Services Manuel d'utilisateur Page 20

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Configuring Data Compression Services
1-2
117352-D Rev. 00
Summary of Bay Networks Data Compression Features
You can configure both software- and hardware-based compression on a circuit or
line basis. Features specific to software and hardware compression follow.
Software-Based Data Compression
Bay Networks offers two software compression protocols:
• WAN Compression Protocol (WCP) -- for Point-to-Point Protocol (PPP),
frame relay, and X.25 links
• Hi/fn LZS -- for PPP links only
These two protocols use different Lev-Zimpel algorithms to implement
compression and provide different levels of interoperability between Bay
Networks routers and routers made by other vendors.
If both ends of the connection are Bay Networks routers, use WCP as the
compression protocol. If the connection is a PPP link and only one end of the
connection is a Bay Networks router, use Hi/fn LZS.
Software-based data compression works over WAN links. Specifically, WCP
works with PPP, frame relay, and X.25 links; Hi/fn LZS works only with PPP
links. Both WCP and Hi/fn LZS work with PPP multilink. WCP also works with
PPP multiline.
Software compression includes the following features:
• Support for all Bay Networks platforms: BayStack
™
Access Node (AN
®
),
Access Stack Node (ASN
™
), Advanced Remote Node
™
(ARN
™
),
Backbone Node (BN
®
), and System 5000
™
• Compression for a Bay Networks Fast Routing Engine (FRE
®
) module at
4 x 128 KB/s compressed throughput, full duplex; or 512 KB/s aggregate
compressed throughput
Note:
The Hi/fn
™
LZS
®
compression option is not included with your initial
purchase of BayRS. Bay Networks Hi/fn LZS compression software
incorporates LZS (licensed from Hi/fn) and therefore must be purchased
separately. To run Hi/fn LZS compression on a PPP link between a Bay
Networks router and a non-Bay Networks router, you must obtain a license for
the Hi/fn LZS compression software, which is delivered on a separate CD.
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