Expand Configuration and Management Manual (G06.24+)

Tuning
Expand Configuration and Management Manual—523347-008
20-24
Using Measure
SYSTEM Entity
The SYSTEM entity provides information about traffic that originates or terminates at
the measured system. This traffic is measured in the form of messages and is reported
as a count of links.
The SYSTEM entity also shows the number of Expand frames sent and received.
Passthrough Expand frames are counted as Sent-Forward or Received-Forward
frames. Sent-Forward frames did not originate at the local node; Received-Forward
frames are not destined for the local node.
Example 20-1 is an example of a SYSTEM entity display.
NETLINE Entity
The NETLINE entity reports several values that you need when modeling traffic on a
path. NETLINE reports part of the path performance associated with a particular
Expand line-handler process, logical device, and ServerNet wide area network (SWAN)
concentrator.
The number of data bytes received is shown in Din4-Bytes and the number of bytes
sent is shown in Dout4-Bytes.
NETLINE also shows the distribution of message sizes in message-size ranges. This
information corresponds to the histogram shown by the SCF interface to the Expand
subsystem. However, unlike SCF, Measure shows only the histogram for the measured
interval.
Example 20-2 shows traffic intensity during a 34.7 second period beginning at
11:53:37. During this period, 1.27 messages of 605.14 bytes were sent per second.
(Relevant information is highlighted in boldface type.)
Note. Passthrough traffic might also be referred to as forwarded or switched traffic.
Example 20-1. SYSTEM Entity Display
Remote System \SSG System Number 73
Local System \PEEWEE From 9 Jan 1997, 13:13:11 For 7.5 Minutes
Links 38.24
Link-Time 0.22
Sent 76.53
Received 38.44
Sent-Forward 0.02
Received-Forward 0.12