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40 Using Enterprise Edge Services

Enterprise Edge Networking Operations Guide P0910464 Issue 01

Backup WAN Links

Enterprise Edge supports Microsoft Point-to-Point Compression (MPPC), RFC

2118 for traffic across dial-up links. The compression ratio of MPPC is

approximately 4-5 to 1.

For the remote backup, Enterprise Edge supports the following authentication

mechanisms:

• Password Authentication Protocol (PAP)

• Challenge Handshake Authentication Protocol (CHAP) is a more secure

procedure for connecting to a system than the PAP. The system attempts CHAP

before using PAP.

Software data compression on backup/dial up link is an optional feature in

Enterprise Edge. The default is set to ENABLE data compression.

Note: Remote user dial in as a RAS client is supported for administrative purposes

only.

Guidelines for Using Remote Dial In

Consider the following guidelines when using remote dial in:

• The same modem is shared between the remote dial-in for administration and

the backup WAN link. If a remote administration user is connected while the

primary link breaks, the automatic backup function does not occur.

• While using back up interface, Enterprise Edge always calls. Enterprise Edge

does not answer an incoming call from a router.

• Support for callback configuration is not provided.

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