Disabling summary LSAs for a stub area

LSAs can be disabled for a stub area.
  1. Enter the configure terminal command to access global configuration mode. 
    device# configure terminal
  2. Enter the router ospf command to enter OSPF router configuration mode and enable OSPFv2 on the device. 
    device(config)# router ospf
  3. Enter the area stub command, specifying an area and a cost, followed by the no-summary parameter to set an additional cost on a specified stub area and prevent any Type 3 and Type 4 summary LSAs from being injected into the area. 
    device(config-ospf-router)# area 40 stub 99 no-summary

The following example configures a stub area, specifying a cost of 99 and preventing any Type 3 and Type 4 summary LSAs from being injected into the area. 

device# configure terminal
device(config)# router ospf
device(config-ospf-router)# area 40 stub 99 no-summary
Parent topic: Stub area and totally stubby area