Avaya Configuring PPP Services Manual de usuario descargar pdf (Pagina 41)

PPP Concepts

308639-14.00 Rev 00

2-13

Multilink is available on all platforms that have more than one WAN line,

including the following platforms:

•BLN

/BCN

•AN

•ASN

™

Using PPP Multilink

The routers at each end of a PPP link (that is, a logical communications line) are

called peers. A link is an individual communication channel between two peers.

Typical links include one ISDN B channel, an aggregation of T1 DS0s, one

dial-up modem connection, and one leased T1 line.

Links can be either leased or switched lines. All links must have the same data

link encapsulation (PPP), and all links must have the same maximum transmission

unit (MTU). On non-ISDN lines, you must configure the clock speed.

When you enable multilink, you can configure a set of links between two peers

into a single “bundle,” which can consist of up to 30 links, possibly of different

bandwidths. (The practical maximum number of lines depends on factors such as

the amount of memory, the number of lines configured, the speed of those lines,

the packet sizes, and the traffic patterns.) With multilink configured, leased lines

in a bundle can be on different router slots. Multilink distributes traffic over each

logical line in a bundle in an amount roughly proportional to the effective

bandwidth of the link.

With multilink and bandwidth-on-demand enabled, you can configure one side of

the link as the congestion monitor. This router monitors network traffic and line

usage. When the traffic exceeds a user-specified threshold, the

bandwidth-on-demand monitor can bring up a secondary line.

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Avaya Configuring PPP Services Manual de usuario Pagina 41