Configuring Ospf Area Parameters - Cisco 3032 Software Configuration Manual

Configuring OSPF
Command
Step 10
ip ospf message digest-key keyid md5 key
Step 11 ip ospf database-filter all out
Step 12 end
Step 13 show ip ospf interface [interface-name]
Step 14
show ip ospf neighbor detail
Step 15 copy running-config startup-config
Use the no form of these commands to remove the configured parameter value or to return to the
default value.

Configuring OSPF Area Parameters

You can optionally configure several OSPF area parameters. These parameters include authentication for
password-based protection against unauthorized access to an area, stub areas, and not-so-stubby-areas
(NSSAs). Stub areas are areas into which information on external routes is not sent. Instead, the area
border router (ABR) generates a default external route into the stub area for destinations outside the
autonomous system. An NSSA does not flood all LSAs from the core into the area, but can import
autonomous-system external routes within the area by redistribution.
Route summarization consolidates advertised addresses into a single summary route to be advertised by
other areas. If network numbers are contiguous, you can use the area range router configuration
command to configure the ABR to advertise a summary route that covers all networks in the range.
The OSPF area router configuration commands are all optional.
Note
Beginning in privileged EXEC mode, follow these steps to configure area parameters:
Command
Step 1 configure terminal
Step 2 router ospf process-id
Cisco Catalyst Blade Switch 3130 and 3032 for Dell Software Configuration Guide
38-32
Purpose
(Optional) Enable MDS authentication.
keyid—An identifier from 1 to 255.
•
key—An alphanumeric password of up to 16 bytes.
•
(Optional) Block flooding of OSPF LSA packets to the interface. By
default, OSPF floods new LSAs to all interfaces in the same area
except to the interface on which the LSA arrives.
Return to privileged EXEC mode.
Display OSPF-related interface information.
Display NSF awareness status of neighbor switch. The output
matches one of these examples:
Options is 0x52
•
LLS Options is 0x1 (LR)
When both of these lines appear, the neighbor switch is
NSF-aware.
Options is 0x42—This means the neighbor switch is not
•
NSF-aware.
(Optional) Save your entries in the configuration file.
Purpose
Enter global configuration mode.
Enable OSPF routing, and enter router configuration mode.
Chapter 38 Configuring IP Unicast Routing
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