Implementing OSPF on Cisco IOS XR Software
Prerequisites for Implementing OSPF on Cisco IOS XR Software
RC-128
Cisco IOS XR Routing Configuration Guide
Prerequisites for Implementing OSPF on Cisco IOS XR Software
The following are prerequisites for implementing OSPF on Cisco IOS XR Software:
• You must be in a user group associated with a task group that includes the proper task IDs for OSPF
commands. Task IDs for commands are listed in the Cisco IOS XR Task ID Reference Guide. For
detailed information about user groups and task IDs, see the Configuring AAA Services on Cisco IOS
XR Software module of the Cisco IOS XR System Security Configuration Guide.
• Configuration tasks for OSPFv3 assume that you are familiar with IPv6 addressing and basic
configuration. See the Implementing Network Stack IPv4 and IPv6 on Cisco IOS XR Software
module of the Cisco IOS XR IP Addresses and Services Configuration Guide for information on
IPv6 routing and addressing.
• Before you enable OSPFv3 on an interface, you must perform the following tasks:
–
Complete the OSPF network strategy and planning for your IPv6 network. For example, you
must decide whether multiple areas are required.
–
Enable IPv6 on the interface.
• Configuring authentication (IP Security) is an optional task. If you choose to configure
authentication, you must first decide whether to configure plain text or Message Digest 5 (MD5)
authentication, and whether the authentication applies to an entire area or specific interfaces.
Information About Implementing OSPF on Cisco IOS XR
Software
To implement OSPF you need to understand the following concepts:
• OSPF Functional Overview, page RC-129
• Key Features Supported in the Cisco IOS XR OSPF Implementation, page RC-130
• Comparison of Cisco IOS XR OSPFv3 and OSPFv2, page RC-131
• Importing Addresses into OSPFv3, page RC-131
• OSPF Hierarchical CLI and CLI Inheritance, page RC-131
• OSPF Routing Components, page RC-132
• OSPF Process and Router ID, page RC-134
• Supported OSPF Network Types, page RC-135
• Route Authentication Methods for OSPF Version 2, page RC-135
• Neighbors and Adjacency for OSPF, page RC-136
• Designated Router (DR) for OSPF, page RC-136
• Default Route for OSPF, page RC-137
• Link-State Advertisement Types for OSPF Version 2, page RC-137
• Link-State Advertisement Types for OSPFv3, page RC-137
• Virtual Link and Transit Area for OSPF, page RC-138
• Route Redistribution for OSPF, page RC-139
• OSPF Shortest Path First Throttling, page RC-139
