Route Selection
©2008 Allied Telesis Inc. All rights reserved.
Software Version 5.2.1
AlliedWare Plus
TM
Operating System Software Reference C613-50003-00 REV E
25.7
How the AlliedWare Plus
TM
OS Adds Routes
The following flow chart shows how the software adds a route to the FIB.
Deletes the old route
or equal-cost route
group from the FIB
Adds this new
route to the FIB
Has the
route reached the
maximum allowed
equal-cost
routes?
Does not add
route to FIB
route_1
End of the Route
Selection Process
Is the
distance for the
new route the same
as the existing
route’s?
Is the
distance for the
new route lower
than the existing
route’s?
Does the
route for this
prefix already
exists in the
FIB?
Adds route to
its RIB
Start:
The AlliedWare
Plus OS receives
a route from
a routing
protocol
TM
Yes
Yes
No
No
Yes
Yes
No
No