Configuring Summary Ranges; Configuring Stub Areas; Configuring Stub Area Networks - HP procurve 8100fl series Management And Configuration Manual

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Configuring Summary Ranges

To reduce the amount of routing information propagated between areas, you
can configure summary-ranges on Area Border Routers (ABRs). On the
switch, summary-ranges are created using the range command
ProCurve(config-ospf-area)#range <ipaddr-mask>
The networks specified using this command describe the scope of an area.
Intra-area Link State Advertisements (LSAs) that fall within the specified
ranges are aggregated into a single summary LSA that is advertised into other
areas as inter-area routes. To turn off advertising the aggregated range, specify
not-advertise.
You can also specify no-discard to specify that the router not generate a discard
route for this range.

Configuring Stub Areas

The switch provides two ways to reduce the number of summary link
advertisements (LSA Type 3) sent into a stub area.
To prevent the router from sending any Type 3 LSAs into the stub area,
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specify the no-summary keyword with the stub command. :
ProCurve(config-ospf-area)#stub no-summary
Use this no summary option if you do not want inter-area routes to be
propagated into the stub area. In this case, default routing is used to reach
inter-areas as external destinations.
Alternatively, you can configure summary filters to filter out specific
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summary LSAs from the stub area. Use this command for Type 3 LSAs you
want to block. Type 3 LSAs that are not specified in this command will be
sent into the stub area.

Configuring Stub Area Networks

If you have hosts and networks that are attached to a router that you want to
be redistributed into OSPF, and you do not want to run OSPF on the interface,
you can use the following stub network and stub host commands.
ProCurve(config-ospf-area)#stubnetwork <ipaddr-mask> cost
<costvalue>
OSPF Configuration
Configuring OSPF Router Parameters
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