Objects > SD-WAN Link Management > Traffic Distribution-Profile
For this Traffic Distribution profile,
select the method the firewall uses to distribute sessions and to
fail over to a better path when path quality deteriorates. Add the
Link Tags that the firewall considers when determining the link
on which it forwards SD-WAN traffic. You apply a Traffic Distribution
profile to each SD-WAN policy rule you create.
Traffic Distribution Profile | |
---|---|
Name | Enter a name for the Traffic Distribution
Profile using a maximum of 31 alphanumeric characters, hyphen, space,
underscore, and period. |
Best Available Path | If cost is not a factor and you will allow
applications to use any path out of the branch, select Best Available
Path. The firewall distributes traffic and fails over to a link
from among the links belonging to all the Link Tags in the list
based path quality metrics to provide the best application experience
to users. |
Top Down Priority | If you have expensive or low capacity links
that you want to use only as a last resort or as a backup link,
select the Top Down Priority method and place the tags that include
those links last in the list of Link Tags for this profile. The
firewall uses the top Link Tag in the list first to determine the
links on which to session load traffic and on which to fail over.
If none of the links in the top Link Tag are qualified, the firewall
selects a link from the second Link Tag in the list. If none of
the links in the second Link Tag are qualified, the process continues
as necessary until the firewall finds a qualified link in the last
Link Tag. If all associated links are overloaded and no link meets
quality thresholds, the firewall uses the Best Available Path method
to select a link on which to forward traffic. If the application’s
jitter, latency, or packet loss exceeds its configured threshold,
the firewall starts at the top of the Top Down list of Link Tags
to find a link to which it fails over. |
Weighted Session Distribution | Select Weighted Session Distribution if
you want to manually load traffic (that matches the rule) onto your
ISP and WAN links and you don’t require failover during brownout
conditions. You manually specify the link’s load when you apply
a static percentage of new sessions that the interfaces grouped
with a single tag will get. You might select this method for applications
that aren’t sensitive to latency and that require a lot of the link’s
bandwidth capacity, such as large branch backups and large file
transfers. Keep in mind that if the link experiences brownout, the
firewall doesn’t reflect the matching traffic to a different link. |
Link Tags | Add the Link Tags you want the firewall
to consider during the link selection process you chose for this
profile. The order of tags matters if you chose the Top Down Priority
method; use Move Up or Move Down to change the order of tags. |
Weight | If you chose the Weighted Session Distribution
method, enter a percentage for each Link Tag you added. The sum
of the percentage values must equal 100%. |
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