System Configurations Optimum Route Detection
l Static IP table: Conceptually, it routes connections to a fixed WAN link by destination IP if you have the IP ranges or
subnets that belongs to the ISP. Optimum Route recognizes a traffic sending to the server located in ISP-A's
network by the destination IP, and transfers it through ISP-A WAN link rather that ISP-B WAN link. This can be also
implemented by cooperation of IP Grouping (See "IP Grouping") and Auto Routing.
l Dynamic detect: It dynamically evaluates WAN links according to the detected round-trip time (RTT) and the
bandwidth loading. Bad peering brings bad RTT value.
The following describes how to configure the settings for Optimum Route detection. After configuring here, you have
to create an Auto Routing policy with algorithm - By Optimum Route, and the corresponding filters (See "Auto
Routing"). FortiWAN provides DNS Proxy to cooperate with Optimum Route to resolve advanced peering issues (See
"DNS Proxy").
Optimum Route Policy:
Options for optimum route detection
Static IP Table : Uses static IP table only.
Dynamic Detect : Uses dynamic detection only.
Static, Dynamic : Uses static detection first, then switches over to dynamic detection after static detec-
tion has failed. [Static, Dynamic] is the default detection method.
Dynamic, Static : Uses dynamic detection first, then switches over to static detection after dynamic
detection has failed.
Static IP Table
Enables to match the IP address entries in the table to work out the optimum route. Administrators can add, delete or
inquire the desirable IP entry in the table.
Table Name : Assign a name to the Static IP Table.
Upload : Click "Browse" to locate static IP table files. Then click "upload".
Subnet Address : Enter a subnet addresses to add to or remove from the table. The format is:
202.99.0.0/255.255.255.0 or 202.99.0.0/24. Note: It is unacceptable to add a single
IP or add such subnet mask as "/255.255.255.255" or "/32".
Action :
l Add to: Add a subnet address to the static IP table.
l Remove from: Remove a subnet address from the static IP table.
Parameter : Check the field of WAN link the static IP table uses.
IP Query : Inquire if a single IP address is in the static IP table. The format is 202.99.96.68.
98 FortiWAN Handbook
Fortinet Technologies Inc.
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