Avaya Configuring Data Compression Services Bedienungsanleitung PDF herunterladen (Seite 42)

Configuring Data Compression Services

2-12

117352-D Rev. 00

PPP Multilink

Multilink

provides capabilities beyond those of multiline circuits. Multilink

consists of a

bundle

of lines between two peers, consisting of up to four links.

Multilink allows you to:

• Distribute traffic across the lines in the bundle in amounts roughly

proportional to the effective bandwidth of each link.

• Use lines that have different speeds, proportionally distributing traffic over

those lines.

• Balance traffic load and restore packet sequence.

• Use switched lines (such as ISDN B channels) as well as leased lines.

• Monitor traffic volume.

Depending on the version of BayRS, the router handles the operation of PPP

multilink and WCP differently.

For BayRS Version 12.10 and later, by default the router negotiates WCP above

the PPP multilink bundle for new circuits only. Negotiating compression

above

the bundle

means that data packets are first compressed and then distributed

across the links in the bundle. The distribution of traffic occurs once for the entire

bundle, so the balance of traffic across the bundle is more accurate. In addition,

the router uses less memory for compression.

Routers using BayRS Version 12.10 or later with an older configuration file

negotiate WCP below the multilink bundle by default. Negotiating compression

below the bundle

means that data packets are first distributed across the links and

then compressed. Compression is done individually for every link. You can

reconfigure the circuit to negotiate WCP above the bundle by changing the CCP

Type parameter to CCP on the routers at both ends of the link.

If you configure a new multilink circuit on a local router running BayRS Version

12.10 or later, and the remote router is running a version earlier than 12.10, you

must change the CCP Type parameter from the default (CCP) to ILCCP for the

local router and set the PPP Mode to multilink.

For a description of the CCP Type parameter, see page A-14

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Avaya Configuring Data Compression Services Bedienungsanleitung Seite 42