Objects > SD-WAN Link Management > 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 reference the 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 apply
The sensitivity setting for each path quality parameter allows
you to indicate to the firewall which parameter is more important
(preferred) for the application(s) 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, which causes
the firewall to examine packet loss first.
If you let the sensitivity settings for latency, jitter, and
packet loss remain 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, latency, 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
Enter a name for the path quality profile
using a maximum of 31 alphanumeric characters, underscore, hyphen,
space, and period.
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 to return to the firewall before the threshold is exceeded
(range is 10 to 2,000; default is 100).
number of milliseconds (range is 10 to 1,000; default is 100).
Packet Loss (%)
percentage of packets lost on the link before the threshold is exceeded
(range is 1 to 100.0; default is 1).
setting for Packet Loss has no effect, so leave the default setting (