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The manual strategy does not require the configuration of a performance SLA. However, performance SLA rules can be configured to monitor the members' status. If all Performance SLA health-checks indicate that an interface is dead, even if this interface is used in a manual mode SD-WAN Rule, this SD-WAN rule will be void.
config system sdwan
set status enable
config zone
edit "virtual-wan-link"
next
end
config members
edit 1
set interface "port9"
set gateway 10.109.31.254
set zone "virtual-wan-link"
next
end
config health-check
edit "sla"
set server "1.1.1.1"
set update-static-route disable
set members 1
next
end
config service
edit 1
set name "rule"
set dst "8.8.8.8/32"
set priority-members 1
next
end
end
When the Performance SLA is failing, the interface is marked as dead:
diagnose system sdwan health-check
Health Check(sla):
Seq(1 port9): state(dead), packet-loss(45.000%) sla_map=0x0
The SD-WAN rule is disabled:
diagnose system sdwan service
Service(1): Address Mode(IPV4) flags=0x200
Gen(2), TOS(0x0/0x0), Protocol(0: 1->65535), Mode(manual)
Service disabled caused by no outgoing path. <-
Members(1):
1: Seq_num(1 port9), dead
Dst address(1):
8.8.8.8-8.8.8.8
To avoid this behavior, one of the following options can be applied:
- Delete ALL related health-checks for which the members are dead. Note that without a health-check, members are considered alive or dead according to the interface status.
- Configure at least one health-check for which the members will be alive.
This behavior can cause issues when there are multiple rules, and in some of them, the SLA is configured.
However, it is also necessary to have rules in manual mode that are always matched. For example, to tag the traffic.
Related article:
Technical Tip: SD-WAN rule in manual mode avoid Performance SLA failed
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