Load-balancing
Traffic load-balancing takes place in active-active HA.
Load-balancing method
The primary device receives all traffic requests and takes the load-balancing decision as follows:
- The primary device processes traffic from even-numbered source IP addresses, such as
10.1.1.10. - It forwards traffic from odd-numbered source IP addresses, such as
10.1.1.11, to the auxiliary device for processing.
After the auxiliary device processes traffic, packets are directly sent to the destination without going through the primary device.
See the traffic and services HA supports.
Layers 3 and 4
| Traffic | Load-balancing |
|---|---|
| Forwarded TCP and translated traffic (including SNAT and virtual host traffic) | |
| VLAN | |
| UDP, ICMP, multicast, broadcast | |
| VPN |
Layer 7
| Traffic | Load-balancing |
|---|---|
| Transparent, direct, and parent proxies | |
| SMTP proxy traffic | |
| HTTPS | |
| Scanned FTP | |
| H.323 |