Avaya Configuring Frame Relay Services Manual de usuario descargar pdf (Pagina 35)

Implementation Notes

2-11

Trafﬁc Distribution between Data Paths

To distribute trafﬁc between multiline data paths, you can use one of two methods:

• Random

• Address-based

Random Distribution

Random distribution means that as the router sends out each packet, it alternates

between the lines. This option determines which line the packet uses based on a

randomly assigned number. For each outbound packet, the router generates a

random number, and this number designates the line to use.

Random balancing evenly distributes trafﬁc and lets the router use the two lines

efﬁciently. Because packets travel on different paths, they arrive at the destination

out of sequence, and the upper-layer protocols, for example, IP and OSI, have to

resequence the information. Some protocols cannot tolerate packets arriving out

of sequence, so be sure this option is appropriate for your application.

Address-based Distribution

Address-based distribution, as the name implies, determines the data path for

outbound trafﬁc based on the source and destination address in each packet. For

any given address pair, the same path is always used.

The router determines whether to route or bridge the packet, and then uses the

appropriate address. It uses the routing-level addresses for routing trafﬁc, and the

MAC-level addresses for bridging trafﬁc.

Address-based distribution ensures that all outbound trafﬁc travels on the same

path, and that the packets arrive in sequence. For protocols that cannot receive

packets out of sequence, use this method. Note, however, that this option does not

always distribute the trafﬁc evenly across each line.

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Avaya Configuring Frame Relay Services Manual de usuario Pagina 35