Creating OSPFv3 Area Ranges
Create an area address range on the OSPFv3 router to reduce the number of area border router (ABR) advertisements into other OSPF areas. An area address range is an implied contiguous range of area network addresses for which the ABR advertises a single summary route.
Before you begin
You must create the OSPF area.
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Change the VRF instance as required to configure OSPFv3 on a specific VRF instance.
Note
Non-default VRFs do not support the configuration of the following parameters:-
OSPFv3 interfaces over IPv6 tunnels
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IPSec on OSPFv3 virtual link interfaces
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About this task
If you create two ranges, and one range is a subset of the other, the router uses the most specific match.
Procedure
Area Aggregate Field Descriptions
Use the data in the following table to use the Area Aggregate tab.
Name |
Description |
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AreaID |
Specifies the area in which the address aggregate exists. Use dotted decimal notation to specify the area name. |
AreaLsdbType |
Specifies the area LSDB type to which the address aggregate applies. interAreaPrefixLsa generates an aggregated summary. nssaExternalLsa generates an NSSA link summary. |
Prefix |
Specifies the IPv6 prefix. The prefix and prefix length define the range. |
PrefixLength |
Specifies the length of the prefix, in bits. The prefix cannot be shorter than 3 bits. The prefix and prefix length define the range. |
Effect |
Specifies the advertisement mode for prefixes in the range. advertiseMatching advertises the aggregate summary LSA with the same link-state ID. doNotAdvertiseMatching does not advertise networks that fall within the range. |
AdvertiseMetric |
Specifies a cost value to advertise for the OSPF area range. This value applies to summary LSAs (Type 3). If the value is 0, OSPF uses the cost to the farthest point in the network that is summarized. |