Area Stub - Enterasys SECURESTACK C3 Configuration Manual

area stub

Mode
Router OSPFv3 configuration: C3(su)‐>router(Config‐router)#
Usage
Address ranges control the advertisement of routes across area boundaries. Routing information
is summarized, or aggregated, at area boundaries. External to the area, at most a single route is
advertised (via an inter‐area‐prefix‐LSA) for each address range. A route is advertised if and only
if the address range's status is set to advertise. The default condition is to advertise.
For ABRs configured for NSSA, route summarization/aggregation can be implemented based on
LSA type — either summary LSAs (specified with the summarylink parameter), or NSSA external
LSAs Type 7 (specified with the nssaexternallink parameter).
You can configure multiple address ranges with this command.
Use the no form of this command to remove a configured address range.
Example
This example configures an address range to be consolidated and advertised based on summary
LSAs.
C3(su)->router(Config-router)# area 20 range 3FFe:501::/32 summarylink
area stub
This command creates a stub area for the specified area ID.
Syntax
area areaid stub
no area areaid stub
Parameters
areaid
Defaults
None.
Mode
Router OSPFv3 configuration: C3(su)‐>router(Config‐router)#
Usage
A stub area is characterized by the fact that AS external LSAs are not propagated into the area.
Removing AS external LSAs and summary LSAs can significantly reduce the link state database of
routers within the stub area.
Use the no form of the command to delete a stub area.
25-16 OSPFv3 Configuration
Specifies the area ID in IP address format (dotted‐quad) or as a decimal
value.