- Configuring OSPF
- IPv6 Routing: OSPFv3
- IPv6 Routing: OSPFv3 Authentication Support with IPsec
- OSPFv2 Cryptographic Authentication
- OSPFv3 IPSec ESP Encryption and Authentication
- OSPF ABR Type 3 LSA Filtering
- OSPF Stub Router Advertisement
- OSPF Update Packet-Pacing Configurable Timers
- OSPF Sham-Link Support for MPLS VPN
- OSPF Retransmissions Limit
- OSPF Support for Multi-VRF on CE Routers
- OSPFv2 Multiarea Adjacency
- OSPFv2 Autoroute Exclude
- OSPFv3 Multiarea Adjacency
- OSPFv3 Authentication Trailer
- OSPFv3 Autoroute Exclude
- OSPFv2-OSPF Live-Live
- OSPFv3 Address Families
- OSPF Forwarding Address Suppression in Translated Type-5 LSAs
- OSPF Inbound Filtering Using Route Maps with a Distribute List
- OSPFv3 Fast Convergence: LSA and SPF Throttling
- OSPF Shortest Path First Throttling
- OSPF Support for Fast Hello Packets
- OSPF Incremental SPF
- OSPF Limit on Number of Redistributed Routes
- OSPFv3 Max-Metric Router LSA
- OSPF Link-State Advertisement Throttling
- OSPF Support for Unlimited Software VRFs per PE Router
- OSPF Area Transit Capability
- OSPF Per-Interface Link-Local Signaling
- OSPF Link-State Database Overload Protection
- OSPF Enhanced Traffic Statistics for OSPFv2 and OSPFv3
- OSPF MIB Support of RFC 1850 and Latest Extensions
- SNMP ifIndex Value for Interface ID in OSPFv2 and OSPFv3 Data Fields
- OSPFv3 Graceful Restart
- OSPF RFC 3623 Graceful Restart Helper Mode
- OSPF Mechanism to Exclude Connected IP Prefixes from LSA Advertisements
- OSPFv2 Local RIB
- OSPFv3 MIB
- TTL Security Support for OSPFv3 on IPv6
- OSPFv3 VRF-Lite/PE-CE
- Graceful Shutdown Support for OSPFv3
- Prefix Suppression Support for OSPFv3
- OSPFv3 ABR Type 3 LSA Filtering
OSPF Area Transit Capability
The OSPF Area Transit Capability feature provides an OSPF Area Border Router (ABR) with the ability to discover shorter paths through the transit area for forwarding traffic that would normally need to travel through the virtual-link path. This functionality allows Cisco IOS software to be compliant with RFC 2328.
- Finding Feature Information
- Information About OSPF Area Transit Capability
- How to Disable OSPF Area Transit Capability
- Additional References
- Feature Information for OSPF Area Transit Capability
Finding Feature Information
Your software release may not support all the features documented in this module. For the latest caveats and feature information, see Bug Search Tool and the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the feature information table.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.
Information About OSPF Area Transit Capability
The OSPF Area Transit Capability feature is enabled by default. RFC 2328 defines OSPF area transit capability as the ability of the area to carry data traffic that neither originates nor terminates in the area itself. This capability enables the OSPF ABR to discover shorter paths through the transit area and forward traffic along those paths rather than using the virtual link or path, which are not as optimal.
For a detailed description of OSPF area transit capability, see RFC 2328, OSPF Version 2, at the following URL:
How to Disable OSPF Area Transit Capability
Disabling OSPF Area Transit Capability on an Area Border Router
This task describes how to disable the OSPF Area Transit Capability feature on an OSPF ABR.
1.
enable
2.
configure
terminal
3.
router
ospf
process-id
[vrf vpn-name]
4.
no
capability
transit
DETAILED STEPS
Additional References
Related Documents
Related Topic |
Document Title |
---|---|
Configuring OSPF |
"Configuring OSPF" module |
Standards
Standard |
Title |
---|---|
None |
-- |
MIBs
MIB |
MIBs Link |
---|---|
None |
To locate and download MIBs for selected platforms, Cisco software releases, and feature sets, use Cisco MIB Locator found at the following URL: |
RFCs
RFC |
Title |
---|---|
RFC 2328 |
OSPF Version 2 |
Technical Assistance
Description |
Link |
---|---|
The Cisco Support and Documentation website provides online resources to download documentation, software, and tools. Use these resources to install and configure the software and to troubleshoot and resolve technical issues with Cisco products and technologies. Access to most tools on the Cisco Support and Documentation website requires a Cisco.com user ID and password. |
Feature Information for OSPF Area Transit Capability
The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to . An account on Cisco.com is not required.