Objects > SD-WAN Link Management > Path Quality Profile
Create an SD-WAN path quality profile.
SD-WAN allows you to create a path quality
profile for each set of applications, application filters, application
groups, services, service objects, and service group objects that
has unique network quality requirements and then reference that
profile in an SD-WAN policy rule. In the profile, you set maximum
thresholds for three parameters: latency, jitter, and packet loss.
When an SD-WAN link exceeds any one of the thresholds, the firewall
selects a new best path for packets matching the SD-WAN rule where
you applied this profile.
The sensitivity setting for each path quality parameter allows
you to indicate to the firewall which parameter is more important
(preferred) for the applications to which the profile applies. The
firewall places more importance on a parameter with a high setting
than a parameter with a medium or low setting. For example, some
applications are more sensitive to packet loss than to jitter or
latency, so you could set packet loss to high sensitivity for the
profile associated with those applications, which causes the firewall
to examine packet loss first.
If you leave the sensitivity settings for latency, jitter, and
packet loss at the default setting (medium) or if you set all three
parameters to the same setting, the order of preference for the
profile is packet loss, then latency, and then jitter.
By default, the firewall measures latency and jitter every 200ms
and takes an average of the last three measurements to measure path
quality in a sliding window. You can modify this behavior by selecting
aggressive or relaxed path monitoring when you configure an SD-WAN
Path Quality Profile Settings
the path quality profile using any combination and maximum of 31
alphanumeric characters, underscores, hyphens, spaces, and periods.
number of milliseconds allowed for a packet to leave the firewall,
arrive at the opposite end of the SD-WAN tunnel, and a response
packet for that packet to return to the firewall before the threshold
is exceeded (range is 10 to 2,000; default is 100).
average variation, in milliseconds, that SD-WAN packet latencies
can vary (range is 10 to 1,000; default is 100). The default jitter
threshold of 100ms means that latency measurements can vary by an
average of 100ms before the jitter threshold is exceeded.
Packet Loss (%)
percentage of packets lost on the link before the threshold is exceeded
(range is 1 to 100.0; default is 1).