Expand Configuration and Management Manual (H06.21+, J06.10+)

Tuning
Expand Configuration and Management Manual — 529522-013
19 - 31
Example 2: Reducing Passthrough Traffic
Figure 19-6 shows a comparison of the bandwidths used for packets of 245, 1024, and
2048 bytes.
Example 2: Reducing Passthrough Traffic
It is common for the role of a node in an Expand network to change over a period of
time. Example
19-7 on page 19-32 shows a situation in which the routine, simple
collection of Measure SYSTEM entity data helped an operations staff discover that
certain nodes in the network had become switches—that is, their resources were used
primarily for passthrough traffic. Further investigation showed that the simple rerouting
of communications lines would help to recover some processor resources and free
controllers to be used elsewhere, perhaps in more stressed network paths.
Measuring Passthrough Traffic on a Single Node
Example 19-7 on page 19-32 shows a summary of Measure SYSTEM entity data on a
node called \JUICE. The data was captured by Measure, placed in a structured file,
and then formatted with Enform.
The SYSTEM data allows you to compare the number of Expand frames transferred
between a node and its neighbors to those that are simply forwarded or passed
Figure 19-6. Packet Size/Bandwidth Comparison
Bits per
message
0
5000
10000
15000
20000
256 1024 2048
Packet Size
(Bytes)
VST029.vsd