H3C Technologies H3C SR8800 - Manual (Page 22)

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NOTE:
The counting for the average or accumulate threshold type is performed per test, but that for the
consecutive type is performed since the test group is started.
3. Triggered actions
The following actions may be triggered:
{
none—NQA only records events for terminal display; it does not send trap information to the
network management server.
{
trap-only—NQA records events and sends trap messages to the network management server.
NOTE:
NQA DNS tests do not support the action of sending trap messages. The action to be triggered in DNS
tests can only be the default one, none.
4. Reaction entry
In a reaction entry, a monitored element, a threshold type, and the action to be triggered are
configured to implement threshold monitoring.
The state of a reaction entry can be invalid, over-threshold, or below-threshold. Before an NQA
test group starts, the reaction entry is in the state of invalid. After each test or probe, threshold
violations are counted according to the threshold type and range configured in the entry. If the
threshold is violated consecutively or accumulatively for a specific number of times, the state of the
entry is set to over-threshold; otherwise, the state of the entry is set to below-threshold.
If the action to be triggered is configured as trap-only for a reaction entry, when the state of the
entry changes, a trap message is generated and sent to the network management server.
NQA concepts
Test group
An NQA test group specifies test parameters including the test type, destination address, and destination
port. Each test group is uniquely identified by an administrator name and operation tag. You can
configure and schedule multiple NQA test groups to test different objects.
Test and probe
After the NQA test group starts, tests are performed at a specific interval. During each test, a specific
number of probe operations are performed. Both the test interval and the number of probe operations
per test are configurable. But only one probe operation is performed during one voice test.
Probe operations vary with NQA test types.
• During a TCP or DLSw test, one probe operation means setting up one connection.
• During a UDP jitter or a voice test, one probe operation means continuously sending a specific
number of probe packets. The number of probe packets is configurable.
• During an FTP, HTTP, DHCP or DNS test, one probe operation means uploading or downloading a
file, obtaining a web page, obtaining an IP address through DHCP, or translating a domain name
to an IP address.
• During an ICMP echo or UDP echo test, one probe operation means sending an ICMP echo request
or a UDP packet.