Specifications

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3-27
Cisco Nexus 3000 Series NX-OS Unicast Routing Configuration Guide, Release 5.0(3)U2(2)
OL-25782-02
Chapter 3 Configuring OSPFv2
Configuring Advanced OSPFv2
DETAILED STEPS
This example shows how to create an NSSA that blocks all summary route updates:
switch# configure terminal
switch(config)# router ospf 201
switch(config-router)# area 0.0.0.10 nssa no-summary
switch(config-router)# copy running-config startup-config
This example shows how to create an NSSA that generates a default route:
switch# configure terminal
switch(config)# router ospf 201
switch(config-router)# area 0.0.0.10 nssa default-info-originate
switch(config-router)# copy running-config startup-config
This example shows how to create an NSSA that filters external routes and blocks all summary route
updates:
switch# configure terminal
switch(config)# router ospf 201
switch(config-router)# area 0.0.0.10 nssa route-map ExternalFilter no-summary
switch(config-router)# copy running-config startup-config
Command Purpose
Step 1
configure terminal
Example:
switch# configure terminal
switch(config)#
Enters configuration mode.
Step 2
router ospf instance-tag
Example:
switch(config)# router ospf 201
switch(config-router)#
Creates a new OSPFv2 instance with the configured
instance tag.
Step 3
area area-id nssa [no-redistribution]
[default-information-originate]
[route-map map-name]] [no-summary]
[translate type7 {always | never}
[suppress-fa]]
Example:
switch(config-router)# area 0.0.0.10
nssa
Creates this area as an NSSA.
Step 4
area area-id default-cost cost
Example:
switch(config-router)# area 0.0.0.10
default-cost 25
(Optional) Sets the cost metric for the default summary
route sent into this NSSA.
Step 5
show ip ospf instance-tag
Example:
switch(config-if)# show ip ospf 201
(Optional) Displays OSPF information.
Step 6
copy running-config startup-config
Example:
switch(config)# copy running-config
startup-config
(Optional) Saves this configuration change.