Dell SmartFabric OS10 User Guide Release 10.5.4

Support for OSPFv3 route summarization

This feature allows administrators to summarize OSPFv3 routes at the autonomous system boundary router (ASBR) level - summary-address and at the area boundary router (ABR) level - area range.

Route summarization helps reduce the size of the routing tables and also the number of link state advertisements (LSAs) that advertise.

This feature also summarizes a specific set of routes and advertises only the summary route to peer device.

Route summarization is a key feature that helps scaling the OSPFv3 network. You must apply the area range on ABRs while summarizing routes between OSPFv3 areas using Type3 LSAs. You must also apply the summary-address on ASBRs while summarizing externally redistributed routes from another protocol domain, such as BGP or static, using Type5 or Type7 LSAs.

During route summarization the following interactions occur between the subsystems:

• Routing - Routes are summarized at the ASBR level using the summary-address command and at the ABR level using the area range command.

• VRF - Configuration of summary addresses and area ranges are supported for all VRF instances.