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ExpertNet Lite Assessment Tool - User Guide
36
Q: How does the throttling mechanism work?
A: The throttling mechanism is separate for ping and SNMP polling. For SNMP,
configuration wizard in "Step 4: SNMP Settings" exposes Poll Interval of Single
Node[secs] and Maximum Total Number of Polls/Sec parameters. Poll interval defines
a polling frequency of each node. The second parameter limits the total number of
SNMP polls issued to the network. (Maximum Total takes precedence over Poll
Interval: if Poll Interval is too small, it is automatically recalculated by the Controller
to satisfy the Maximum Total). The default Poll Interval is 60 seconds, Maximum Total
is 2.
For ping polling, the configuration wizard in "Step 5: Ping Settings" exposes the 'Avg
Number of Polls/Sec' parameter which determines the frequency of sending pings to
the network. The default value is 2.
Q: There is a Diffserv value in the config.xml file. Does that tag UDP packets?
Is this one direction or both?
A: The ELAT Controller has the ability to tag UDP packets as diffserv. These packets
are outbound only; the response is an ICMP port unreachable, and is not tagged.
Q: Our report shows that the network fails the analysis, but there isn't much
loss and delay and jitter look acceptable. Why the failure?
A: Check to see if there is IPX or raw Netbios (not IP encapsulated) on the network.
These protocols do not respond to IP QOS and will not show up as IP traffic, but will
affect the IP traffic.
Q: I get the following error message on start up.
A
:
T
h
i
s
This is a known bug that occasionally happens on certain machines. It should only
occur once and then you should be able to continue.
Q: Upon start up, ELAT presents an error dialog showing: “Route redirection
is not disabled on this machine...” and then shuts down.
A: Typically the installer will set this registry variable on the controller PC.
Occasionally this will not work and it will have to be set manually.
● Open the registry with START -> RUN -> ‘regedit’.