Optimum Route Detection
System Configurations
MIB Field
OID
Description
fwnSysConnectionRates
1.3.6.1.4.1.12356.118.1.10
Number of connections that are
established with the FortiWAN unit
every second.
fwnWanStatus
1.3.6.1.4.1.12356.118.2.1.2.1.3
State of every WAN link: ok(1),
failed(2), disabled(3), backup(4)
and unkown(5).
fwnWanIP
1.3.6.1.4.1.12356.118.2.1.2.1.4
First one of the IP addresses
deployed on the WAN port (loc-
alhost) of every WAN link.
See also
l
FortiWAN in HA (High Availability) Mode
l
l
l
Optimum Route Detection
FortiWAN's Optimum Route is used mainly to resolve the inefficient transmission due to ISP peering issue. Peering
between two ISPs is an interconnection of administratively separate Internet networks (belonging to the two ISPs
individually) for the purpose of exchanging traffic between the users in each network. For example, the data
transmission between a user in ISP-A's network and a server in ISP-B's network must be exchanged between the two
networks. Settlement-free peering between the two ISPs is the most efficient way for transmission between the two
networks. However, two situations might cause the transmission very inefficient;
l
An ISP restricts the bandwidth for peering with other ISPs on the purpose of competition in business. The peering
becomes bottleneck to traffic being exchanged between the two ISP networks.
l
If there is no agreement by the two ISP networks to peer, the transit service, which is a method to deliver traffic
through other ISPs, is required.
Both the situations might make the transmission extremely slow. FortiWAN's Auto Routing balances traffic over
multiple WAN links (multiple ISP networks), but it is not aware of the peering between those ISPs. Optimum Route is
the service enabling users to access optimum route and to maximize WAN efficiency over multiple ISPs. Considering
the deployment that FortiWAN is connected to ISP-A and ISP-B and the peering between the two networks is bad.
With general Auto Routing algorithms (See "
"), connections to a server located in ISP-A's network might
be distributed to WAN link ISP-A and ISP-B (according to round-robin or throughput). Transmission distributed through
ISP-B will be extremely slow due to the bad peering. Optimum Route resolves this by routing all the connections to the
server through WAN link ISP-A. Users connect the server in ISP-A network without peering.
Optimum Route operates in two modes: static IP table and dynamic detect.
FortiWAN Handbook
Fortinet Technologies Inc.
97
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