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OSPFv2

  • 1 OSPFv2
    • 1.1 OSPFv2 Overview
    • 1.2 Autonomous System
    • 1.3 OSPFv2 Components and Roles
    • 1.4 Reduction of Equivalent AS External LSAs
    • 1.5 Algorithm for AS External LSA Reduction
    • 1.6 Maximum limit overload processing
    • 1.7 Enabling OSPFv2
    • 1.8 Backbone area
    • 1.9 Assigning OSPFv2 areas
    • 1.10 Area range
      • 1.10.1 Assigning an area range
    • 1.11 Area Types
    • 1.12 Stub area and totally stubby area
      • 1.12.1 Disabling summary LSAs for a stub area
    • 1.13 Not-So-Stubby Area (NSSA)
      • 1.13.1 Configuring an NSSA
      • 1.13.2 Configuring a Summary Address for the NSSA
    • 1.14 Assigning Interfaces to an Area
    • 1.15 Link State Advertisements
    • 1.16 Configuring the Maximum Number of LSAs in the LSDB
    • 1.17 Checking the LSDB Overflow State
    • 1.18 Virtual Links
      • 1.18.1 Configuring virtual links
    • 1.19 Default Route Origination
    • 1.20 External route summarization
    • 1.21 SPF timers
    • 1.22 Modifying Shortest Path First timers
    • 1.23 OSPFv2 administrative distance
    • 1.24 OSPFv2 LSA refreshes
      • 1.24.1 Configuring the OSPFv2 LSA pacing interval
    • 1.25 Disabling the Opaque LSA Capability
    • 1.26 Support for OSPF RFC 2328 Appendix E
    • 1.27 OSPFv2 Graceful Restart
      • 1.27.1 Disabling OSPFv2 Graceful Restart
      • 1.27.2 Re-enabling OSPFv2 Graceful Restart
      • 1.27.3 Disabling OSPFv2 graceful restart helper
    • 1.28 OSPFv2 stub router advertisement
    • 1.29 OSPFv2 Shortest Path First throttling
    • 1.30 IETF RFC and Internet Draft Support
    • 1.31 OSPFv2 non-stop routing
      • 1.31.1 Limitations of NSR
      • 1.31.2 Enabling OSPFv2 NSR
    • 1.32 Synchronization of critical OSPFv2 elements
      • 1.32.1 Link state database synchronization
      • 1.32.2 LSA delayed acknowledging
      • 1.32.3 LSA syncing and packing
      • 1.32.4 Neighbor device synchronization
      • 1.32.5 Synchronization limitations
      • 1.32.6 Interface synchronization
    • 1.33 Standby Module Operations
    • 1.34 OSPFv2 distribute list
      • 1.34.1 Configuring an OSPFv2 Distribution List Using ACLs
      • 1.34.2 Configuring an OSPFv2 Distribution List Using Route Maps
    • 1.35 OSPFv2 Route Redistribution
    • 1.36 Redistributing routes into OSPFv2
    • 1.37 Load Sharing
    • 1.38 Interface types to which the reference bandwidth does not apply
    • 1.39 Changing the Reference Bandwidth for the Cost on OSPFv2 Interfaces
    • 1.40 OSPFv2 over VRF
      • 1.40.1 Enabling OSPFv2 in a non-default VRF
    • 1.41 Configuring the OSPFv2 Max-Metric Router LSA
    • 1.42 Re-enabling OSPFv2 compatibility with RFC 1583
    • 1.43 OSPFv2 Authentication
      • 1.43.1 OSPFv2 Keychain Authentication
      • 1.43.2 OSPFv2 authentication configuration
        • 1.43.2.1 Configuring plain text authentication on an OSPFv2 interface
        • 1.43.2.2 Configuring Plain Text Authentication on an OSPFv2 Virtual Link
        • 1.43.2.3 Configuring MD5 authentication on an OSPFv2 interface
        • 1.43.2.4 Configuring MD5 Authentication on an OSPFv2 Virtual Link
        • 1.43.2.5 Configuring HMAC-SHA-1 or HMAC-SHA-256 authentication on an OSPFv2 interface
        • 1.43.2.6 Configuring HMAC-SHA-1 or HMAC-SHA-256 on an OSPFv2 Virtual Link
        • 1.43.2.7 Configuring keychain authentication on an OSPFv2 interface
        • 1.43.2.8 Configuring Keychain Authentication on an OSPFv2 Virtual Link
        • 1.43.2.9 Configuring authentication key activation wait time on an OSPFv2 interface
        • 1.43.2.10 Configuring Authentication Key Activation Wait Time on an OSPFv2 Virtual Link
        • 1.43.2.11 Displaying OSPFv2 Results
    • 1.44 Changing Default Settings
    • 1.45 Disabling and re-enabling OSPFv2 event logging
    • 1.46 Understanding the effects of disabling OSPFv2
      • 1.46.1 Disabling OSPFv2

Synchronization of critical OSPFv2 elements

All types of LSAs and the neighbor information are synchronized to the standby module using the NSR synchronization library and IPC mechanism to transmit and receive packets.

In this section:

  1. Link state database synchronization
  2. LSA delayed acknowledging
  3. LSA syncing and packing
  4. Neighbor device synchronization
  5. Synchronization limitations
  6. Interface synchronization
Parent topic: OSPFv2

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