Configuring Nssa - Cisco Nexus 7000 Series Configuration Manual

Chapter 7 Configuring OSPFv3
S e n d d o c u m e n t c o m m e n t s t o n e x u s 7 k - d o c f e e d b a c k @ c i s c o . c o m .
Command
area area-id stub no-summary
Example:
switch(config-router)# area 20 stub
no-summary

Configuring NSSA

You can configure an NSSA for part of an OSPFv3 domain where limited external traffic is required. See
the "Not-So-Stubby Area" section on page
External (type 5) LSA and flood the OSPFv3 domain with this routing information. An NSSA can be
configured with the following optional parameters:
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BEFORE YOU BEGIN
Ensure that you have enabled the OSPF feature (see the
page
Ensure that there are no virtual links in the proposed NSSA and that it is not the backbone area.
Ensure that you are in the correct VDC (or use the switchto vdc command).
SUMMARY STEPS
1.
2.
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6.
OL-20002-02
No redistribution—Redistributed routes bypass the NSSA and are redistributed to other areas in the
OSPFv3 autonomous system. Use this option when the NSSA ASBR is also an ABR.
Default information originate—Generates a Type-7 LSA for a default route to the external
autonomous system. Use this option on an NSSA ASBR if the ASBR contains the default route in
the routing table. This option can be used on an NSSA ABR whether or not the ABR contains the
default route in the routing table.
Route map—Filters the external routes so that only those routes you want are flooded throughout
the NSSA and other areas.
Translate—Translates Type-7 LSAs to AS External (type 5) LSAs for areas outside the NSSA. Use
this command on an NSSA ABR to flood the redistributed routes throughout the OSPFv3
autonomous system. You can optionally suppress the forwarding address in these AS External LSAs.
No summary—Blocks all summary routes from flooding the NSSA. Use this option on the NSSA
ABR.
7-13).
config t
router ospfv3 instance-tag
area area-id nssa [no-redistribution] [default-information-originate [route-map map-name]]
[no-summary] [translate type7 {always | never} [suppress-fa]]
address-family ipv6 unicast
area area-id default-cost cost
copy running-config startup-config
Cisco Nexus 7000 Series NX-OS Unicast Routing Configuration Guide, Release 4.x
Purpose
Creates this area as a totally stubby area.
7-9. You can optionally translate this external traffic to an AS
"Enabling the OSPFv3 Feature" section on
Configuring Advanced OSPFv3
7-23