tailieunhanh - Sample Configuration for Authentication in OSPFDocument ID: 13697Introduction Prerequisites Requirements Components Used Conventions Background Information Configure Network Diagram Configurations for Plain Text Authentication Configurations for MD5 Aut

Sample Configuration for Authentication in OSPF Document ID: 13697 Introduction Prerequisites Requirements Components Used Conventions Background Information Configure Network Diagram Configurations for Plain Text Authentication Configurations for MD5 Authentication Verify Verify Plain Text Authentication Verify MD5 Authentication Troubleshoot Troubleshoot Plain Text Authentication Troubleshoot MD5 Authentication Related Information Introduction This document shows sample configurations for Open Shortest Path First (OSPF) authentication which allows the flexibility to authenticate OSPF neighbors. You can enable authentication in OSPF in order to exchange routing update information in a secure manner. OSPF authentication can either be none (or null), simple, or MD5. The authentication method "none" means that no authentication. | Sample Configuration for Authentication in OSPF Document ID 13697 Introduction Prerequisites Requirements Components Used Conventions Background Information Configure Network Diagram Configurations for Plain Text Authentication Configurations for MD5 Authentication Verify Verify Plain Text Authentication Verify MD5 Authentication Troubleshoot Troubleshoot Plain Text Authentication Troubleshoot MD5 Authentication Related Information Introduction This document shows sample configurations for Open Shortest Path First OSPF authentication which allows the flexibility to authenticate OSPF neighbors. You can enable authentication in OSPF in order to exchange routing update information in a secure manner. OSPF authentication can either be none or null simple or MD5. The authentication method none means that no authentication is used for OSPF and it is the default method. With simple authentication the password goes in clear-text over the network. With MD5 authentication the password does not pass over the network. MD5 is a message-digest algorithm specified in RFC 1321. MD5 is considered the most secure OSPF authentication mode. When you configure authentication you must configure an entire area with the same type of authentication. Starting with Cisco IOS Software Release 8 authentication is supported on a per-interface basis. This is also mentioned in RFC 2328 Appendix D. This feature is added in Cisco bug ID CSCdk33792 registered customers only . Prerequisites Requirements Readers of this document should be familiar with basic concepts of OSPF routing protocol. Refer to the Open Shortest Path First documentation for information on OSPF routing protocol. Components Used The information in this document is based on these software and hardware versions. Cisco 2503 routers Cisco IOS Software Release 27 The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared default