How alliedware plus adds routes, Adds a route to the fib – Allied Telesis AlliedWare Plus Operating System Version 5.4.4C (x310-26FT,x310-26FP,x310-50FT,x310-50FP) User Manual
Page 712
Route Selection
Software Reference for x310 Series Switches
28.8
AlliedWare Plus
TM
Operating System - Version 5.4.4C
C613-50046-01 REV A
How AlliedWare Plus Adds Routes
The following flow chart shows how the software adds a route to the FIB.
Figure 28-5: How AlliedWare Plus
TM
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_2.eps
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
Deletes the old route
or equal-cost route
group from the FIB
Yes
No
Yes
No
No
Deletes the old route
or equal-cost route
group from the FIB
Is the
metric for the
new route the same
as the existing
route’s?
Is the
metric for the
new route lower than
the existing
route’s?
No
No
Is the
new route
older than the
existing
route?
Is the
new route the
same type as the
existing
route?
No
Yes
No
No
Yes
Yes
Yes
Yes
Yes