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Cisco Nexus 7000 Series NX-OS Unicast Routing Configuration Guide, Release 4.x
OL-20002-02
Chapter 6 Configuring OSPFv2
Configuring Advanced OSPFv2
Configuring Stub Areas
You can configure a stub area for part of an OSPFv2 domain where external traffic is not necessary. Stub
areas block AS External (type 5) LSAs, limiting unnecessary routing to and from selected networks. See
the “Stub Area” section on page 6-8. You can optionally block all summary routes from going into the
stub area.
BEFORE YOU BEGIN
Ensure that you have enabled the OSPF feature (see the “Enabling the OSPFv2 Feature” section on
page 6-14).
Ensure that there are no virtual links or ASBRs in the proposed stub area.
Ensure that you are in the correct VDC (or use the switchto vdc command).
SUMMARY STEPS
1. config t
2. router ospf instance-tag
3. area area-id stub
4. area area-id default-cost cost
5. show ip ospf instance-tag
6. copy running-config startup-config
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