HP 6400cl, Management Manual, Page: 527 / 664

IP Routing Features
Configuring OSPF
Example: Here is an example of the commands to set up several OSPF areas.
HPswitch(ospf)# area 192.5.1.0
HPswitch(ospf)# area 200.5.0.0
HPswitch(ospf)# area 0.0.0.0
HPswitch(ospf)# write memory
Syntax:
area < num > | < ip-addr > [normal | stub < cost > [no-summary]]
The <
num
> | <
ip-addr
> parameter specifies the area number, which can be a
number or in IP address format. If you specify a number, the number can be
from 0 – 4,294,967,295.
The
<
cost
>
specifies the cost of the default route to be injected into the stub
area, if this routing switch is an ABR. The value can be from 1 – 16,777,215. If
you configure a stub area, you must specify the cost. There is no default.
Normal areas do not use the cost parameter.
N o t e
The switch CLI requires that you enter a cost value when specifying the stub
parameter, but this cost value is ignored. The actual cost is provided by the
Area Border Router (ABR).
The no-summary parameter applies only to stub areas and disables summary
LSAs from being sent into the area. See “Disabling Summary LSAs” below.
Disabling Summary LSAs
By default, the switch sends summary LSAs (LSA type 3) into stub areas. You
can further reduce the number of LSAs sent into a stub area by configuring
the switch to stop sending summary LSAs into the area. You can disable the
summary LSAs when you are configuring the stub area or later after you have
configured the area.
This feature disables origination of summary LSAs, but the switch still accepts
summary LSAs from OSPF neighbors and floods them to other neighbors. The
switch can form adjacencies with other routers regardless of whether summa­
rization is enabled or disabled for areas on each switch.
When you enter a command to disable the summary LSAs, the change takes
effect immediately. If you apply the option to a previously configured area, the
switch flushes all of the summary LSAs it has generated (as an ABR) from the
area.
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