Cisco Nexus 7000 Series - Configuring Advanced Ospfv2; Configuring Filter Lists for Border Routers

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6-23
Cisco Nexus 7000 Series NX-OS Unicast Routing Configuration Guide, Release 4.x
OL-20002-02
Chapter 6 Configuring OSPFv2
Configuring Advanced OSPFv2
The following example shows how to set an interface for simple, unencrypted passwords and set the
password for Ethernet interface 1/2:
switch# config t
switch(config)# router ospf 201
switch(config-router)# exit
switch(config)# interface ethernet 1/2
switch(config-if)# ip router ospf 201 area 0.0.0.10
switch(config-if)# ip ospf authentication
switch(config-if)# ip ospf authentication-key 0 mypass
switch(config-if)# copy running-config startup-config
Configuring Advanced OSPFv2
Configure OSPFv2 after you have designed your OSPFv2 network.
This section includes the following topics:
• Configuring Filter Lists for Border Routers, page 6-23
• Configuring Stub Areas, page 6-25
• Configuring a Totally Stubby Area, page 6-26
• Configuring NSSA, page 6-27
• Configuring Virtual Links, page 6-29
• Configuring Redistribution, page 6-31
• Limiting the Number of Redistributed Routes, page 6-33
• Configuring Route Summarization, page 6-35
• Configuring Stub Route Advertisements, page 6-36
• Modifying the Default Timers, page 6-37
• Configuring Graceful Restart, page 6-40
• Restarting an OSPFv2 Instance, page 6-41
• Configuring Graceful Restart, page 6-40
Configuring Filter Lists for Border Routers
You can separate your OSPFv2 domain into a series of areas that contain related networks. All areas must
connect to the backbone area through an area border router (ABR). OSPFv2 domains can connect to
external domains as well, through an autonomous system border router (ASBR). See the “Areas” section
on page 6-4.
ABRs have the following optional configuration parameters:
• Area range—Configures route summarization between areas. See the “Configuring Route
Summarization” section on page 6-35.
• Filter list—Filters the Network Summary (type 3) LSAs on an ABR that are allowed in from an
external area.
ASBRs also support filter lists.