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Last update: 2021-10-15

Load-balancing support

In Active–Active mode, the primary device receives all network traffic and allocates traffic to the auxiliary in a process known as load-balancing. Load-balancing support varies according to traffic type.

Traffic type Supported?
Normal forwarded TCP traffic Y
NATed (both SNAT and virtual host) forwarded TCP traffic Y
TCP traffic passing through proxy subsystem: transparent proxy, direct proxy, parent proxy and VLAN traffic Y
Route mode, bridge mode, mixed mode, and multiport bridge mode traffic: TCP traffic passing through the proxy subsystem (transparent/direct/parent); forwarded TCP traffic; NATed (SNAT and virtual host) forwarded TCP traffic; HTTPS connection; VLAN traffic Y
VPN N
UDP N
ICMP N
Multicast sessions N
Broadcast sessions N
Scanned FTP N
Traffic coming through RED devices and access points N
TCP traffic for the user portal, the web admin console or Telnet console N
H323 traffic sessions N
Control traffic for all modules N
Route mode, bridge mode, mixed mode, and multiport bridge mode traffic: VPN sessions, traffic other than TCP (UDP, ICMP, multicast, broadcast, etc.); system-generated traffic; scanned FTP traffic; traffic coming through wireless RED devices and access points; TCP traffic for the user portal, the web admin console or the CLI; H323 traffic sessions; control traffic for all modules N
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