Expand Configuration and Management Manual (G06.24+)

Subsystem Description

Expand Configuration and Management Manual—523347-008

18-27

Calculating Route Time Factors

Regular Maps Exchanges

A maps exchange is a periodic sharing of network map information. Maps messages,

called distance vector (DV) messages, are exchanged at variable-rate intervals by

default. You can specify a fixed five-minute interval exchange by setting the

AUTOMATICMAPTIMER modifier.

Calculating Route Time Factors

A route is a sequence of one or more paths through the network. The Expand

subsystem calculates route TFs for you by adding together the TFs of all the lines,

paths, or multi-CPU paths in the route; the total is the route TF. This is the same both

types of time factor.

Figure 18-8, Sample Network With Time Factors, on page 18-27 shows a simple five-

node network. TFs are assigned to the lines between nodes. The double lines between

nodes \A and \B indicate a two-line path.

Note the route from node \A to node \D through node \B. The TF for this route is 5,

which is the total of the TFs between node \A and node \B (TF 4) and node \B and

node \D (TF 1).

Note. The AUTOMATICMAPTIMER modifier is explained in Section 6, Configuring the

Network Control Process.

Figure 18-8. Sample Network With Time Factors

016CDT .CDD

TF 4

TF 1 TF 1

TF 1

Node \A

Node \C

TF 1

Node \B

Node \D

Node \E