Cisco Nexus 7000 Series - Configuring Stub Areas

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7-21
Cisco Nexus 7000 Series NX-OS Unicast Routing Configuration Guide, Release 4.x
OL-20002-02
Chapter 7 Configuring OSPFv3
Configuring Advanced OSPFv3
The following example shows how to enable graceful restart if it has been disabled:
switch# config t
switch(config)# router ospfv3 201
switch(config-router)# address-family ipv6 unicast
switch(config-router-af)# area 0.0.0.10 filter-list route-map FilterLSAs in
switch(config-router-af)# copy running-config startup-config
Configuring Stub Areas
You can configure a stub area for part of an OSPFv3 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 7-9. 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 OSPFv3 Feature” section on
page 7-13).
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 ospfv3 instance-tag
Step 3
address-family ipv6 unicast
Example:
switch(config-router)# address-family
ipv6 unicast
switch(config-router-af)#
Enters IPv6 unicast address family mode.
Step 4
area area-id filter-list route-map
map-name {in | out}
Example:
switch(config-router-af)# area 0.0.0.10
filter-list route-map FilterLSAs in
Filters incoming or outgoing Inter-Area Prefix (type 3)
LSAs on an ABR.
Step 5
show ipv6 ospfv3 policy statistics area
id filter-list {in | out}
Example:
switch(config-if)# show ipv6 ospfv3
policy statistics area 0.0.0.10
filter-list in
(Optional) Displays OSPFv3 policy information.
Step 6
copy running-config startup-config
Example:
switch(config-router)# copy
running-config startup-config
(Optional) Saves this configuration change.
Command Purpose