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Load Balancing & Fault Tolerance Outbound Load Balancing and Failover (Auto Routing)
to balance outbound traffic even when all the WAN links are in perfect working condition. Auto routing cannot prevent
data loss on a WAN link when it fails, but all subsequent sessions will be automatically routed to other working links.
FortiWAN provides mechanisms to record, notify and analysis on events refer to the Auto Routing service, see "
Log
",
"
Statistics: Traffic
", "
Statistics: Bandwidth
" and "
Reports
".
Configurations
It allows administrators to determine the way traffic is routed to WAN links. Multiple WAN links have a variety of ideal
auto-routing methods for any network environment. Auto routing is configured in 2 steps: Policies and Filters.
Policy :
Allows administrators to select load balancing algorithm to be deployed in the Fil-
ters. Each policy can be named accordingly and administrator can decide which
WAN links to be used before adding in the filters table.
Filter : FortiWAN will base on the filters table to manage the outbound traffic by matching
them in top-down order. After this, Auto Routing will consult the filtering table and
check if the connection to be established matches any filter in the table. If the con-
nection matches the conditions specified in the filter, the routing policy assigned to
that filter will decide which WAN link the connection will use.
Policy
Label : Assigning name to auto routing policy.
T : Check to enable threshold function to the policy. Administrators can configure the
downstream and upstream threshold of each WAN link on the configuration page of
WAN Setting (See "
Configuring your WAN "). WAN links with traffic that exceeds the
threshold values will be considered as failed to Auto Routing, and traffic flow will be
re-directed to other WAN links based on its algorithm.
118 FortiWAN Handbook
Fortinet Technologies Inc.