SD WAN High Availability HA-Deployments:-
SD WAN High Availability HA-Deployments:-
Two ways to enable HA:-
1)manually enable under Device TAB>HA-Enable
2)while creating a new VCE check *enable HA
One click to enable HA
++Devices automatically discover and establish active/standby relationship
NOTE1:- There is no Preempt in VCE.
NOTE2:- by default highest serial number will be Active.
When failover happens:-
++links are down
++services restarts
++when config pushed from VCO (only device tab)
Failover link:-
++exchanges HEARTBEAT
++exchanges State information
++exchanges LAN/WAN port status
++exchanges session information
++In HA heartbeat it sends list of ports which are active to VCE(standby)
VCE(Active)----list of ports to ---->VCE(standby)
EX:- If two ports are active in VCE(Active) then the same Two ports should be active in VCE(Standby)
else there will be failover.
HA design:-
Layer-2-
should be both on LAN and WAN side.
++mac and ip address will be same for active/standby
Layer-3:-
++LAN-HSRP/VRRP
++WAN-L2
++route to VIP from VCE
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