Permanent Wan Connection - Nortel Enterprise Edge 2.0 Programming Manual

50 Configuring Enterprise Edge Resources

Permanent WAN Connection

The permanent WAN connection is exposed as a dedicated network adapter. The
permanent link supports frame relay or Point-to-Point protocol (PPP) at the link
layer. The link protocol used depends on the existing network or on the service you
buy from your Internet service provider. The two ports provided by the SDL WAN
interface card can be independently configured to run frame relay or PPP.
Frame Relay
Enterprise Edge supports frame relay in group mode. That is, for each physical port
(serial sync or T1 port), there is one IP address for all PVCs (permanent virtual
circuits). The available Data Link Control interface numbers are 0-1023. Of the
1023 PVCs, 16 are reserved. The maximum number of PVC's allowed is 1008.
For a frame relay network, Enterprise Edge supports the Frame Relay Forum
standard FRF.9 compression protocol with the standard STAC compression
algorithm. Enterprise Edge software performs the compression. For information on
enabling or disabling WAN data compression, see
page 50.
Point-to-Point-Protocol (PPP)
Point-to-Point Protocol (PPP) is a full-duplex transmission protocol for
communication between two computers using a serial interface, typically a personal
computer connected by telephone line to a server. For example, your Internet
service provider (ISP) can provide you with a PPP connection so that the ISP's
server can respond to your requests, pass them on to the Internet, and return your
requested Internet responses to you. PPP uses the Internet protocol (IP).
Enterprise Edge supports PPP Compression Control Protocol (CCP) (RFC 1962)
with STAC compression algorithm. This compression is done by Enterprise Edge
software and can be enabled or disabled using a parameter in PPP configurations.
For information on WAN data compression, see
50.
WAN Data Compression
Enterprise Edge provides a WAN Data Compression feature. You can use data
compression on permanent WAN connection and on backup WAN connection. By
default, WAN Data Compression is enabled on Enterprise Edge. WAN Data
Compression can be enabled or disabled from the
Parameters screen or from the
system configuration.
On a permanent WAN connection, Enterprise Edge supports the following data
compression protocol:
• Frame Relay Forum standard FRF.9 data compression protocol with de facto
standard STAC compression algorithm
• PPP Compression Control Protocol (RFC 1962) with STAC compression
algorithm
Enterprise Edge 2.0 Programming Operations Guide
WAN Data Compression
WAN Data Compression
Setting WAN Frame Relay
WAN PPP Parameters
on page
screen, depending on your
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on