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IP Routing

Select from the following IP routing technologies for more in-depth information. Technology-specific resources available from these pages can assist you with network design, configuration, maintenance and operation, troubleshooting, and other related topics.
  • Integrated Intermediate System-to-Intermediate System (IS-IS)
  • Enhanced Interior Gateway Routing Protocol (EIGRP)
  • Border Gateway Protocol (BGP)
  • RIP v6
  • RIP v2
  • HTTP Distribution and Replication Protocol (DRP)
  • Multiprotocol BGP (MBGP)
  • Interior Gateway Routing Protocol (IGRP)
  • Exterior Gateway Protocol (EGP)
  • Classless Interdomain Routing (CIDR)
  • Multi-topology Routing
  • On-Demand Routing (ODR)
  • Cisco Optimized Edge Routing (OER)
  • Routing Information Protocol (RIP)
  • Interior Gateway Protocol (IGP)
  • Open Shortest Path First (OSPF)
  • Open a TAC Case Online
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    • Technology Information

        Technology Q&A

      • Border Gateway Protocol (BGP)

        • Examine Border Gateway Protocol Frequently Asked Questions 28-Aug-2023
      • Enhanced Interior Gateway Routing Protocol (EIGRP)

        • EIGRP Frequently Asked Questions 17-Jul-2012
      • Open Shortest Path First (OSPF)

        • Review OSPF Frequently Asked Questions 02-Feb-2023
        • How Does OSPF Generate Default Routes? 10-Aug-2005
        • What Does the show ip ospf interface Command Reveal 10-Aug-2005
      • IP Routing Frequently Asked Questions 30-Apr-2008

        Technology White Paper

      • Open Shortest Path First (OSPF)

        • OSPF Redistribution Among Different OSPF Processes 15-Sep-2014 (ZIP - 100 KB)
        • Designing Large Scale Service Provider Dial Networks with OSPF 10-Aug-2005
        • OSPF Database Explanation Guide 10-Aug-2005
      • BGP

        • Examine Border Gateway Protocol Case Studies 08-Jun-2023
    • Design

        Design TechNotes

      • Open Shortest Path First (OSPF)

        • OSPF Redistribution Among Different OSPF Processes 15-Sep-2014 (ZIP - 100 KB)
      • Routing Information Protocol (RIP)

        • ICMPv6 Packet Types and Codes 10-Aug-2005
    • Configuration

        Configuration Examples and TechNotes

      • Configure BGP to Advertise a Default Route on Nexus Switches 11-Aug-2025
      • Configure BGP FlowSpec VRF to VRF Redirection 19-Jun-2025
      • Configure and Verify VXLAN with MP-BGP EVPN Control Plane 04-Jun-2025
      • Use HSRP to Provide Redundancy in a Multihomed BGP Network 15-May-2025
      • Configure BGP with Two Different Service Providers 07-May-2025
      • Configure ASA Border Gateway Protocol 15-Apr-2025
      • Configure OSPF with Multi-Area Adjacency 28-Jan-2025
      • Configure and Verify the BGP Conditional Advertisement Feature 13-Dec-2024
      • Configure Route Leak Between Global and VRF Routing Table without Next-Hop 12-Nov-2024
      • Configure IS-IS Adjacency and Area Types 25-Jun-2024
      • Identify how OSPF Injects a Default Route in a Normal Area 23-Feb-2024
      • Configure BGP Confederations on Nexus 9000 07-Feb-2024
      • Configure the BGP Maximum-Prefix Feature 15-Dec-2023
      • Configure ISP Failover with Default Routes Using IP SLA Tracking 16-Nov-2023
      • Configure Nexus EVPN-VXLAN Multi-Site with Route Server 31-Mar-2023
      View all documentation of this type
    • Operation and Troubleshooting

        Troubleshooting TechNotes

      • Configure SD-WAN for Site-to-Site VPN over Secure Firewall 01-Oct-2025new
      • Troubleshoot EIGRP on FTD Devices Managed by FMC 23-Sep-2025new
      • Understand and Troubleshoot Flexible Algorithm in ISIS 10-Sep-2025new
      • Troubleshoot Common BGP Issues 26-Aug-2025
      • Troubleshoot EIGRP Common Issues 20-Aug-2025
      • Configure Nexus EVPN-VXLAN Multi-Site with Route Server 24-Jul-2025
      • Configure Allowas-in Feature in BGP 16-Jul-2025
      • Configure EIGRP to Influence Path Selection 29-May-2025
      • Use BGP Route Reflection and Multiple Cluster IDs 20-May-2025
      • Understand the Redistribution of OSPF Routes into BGP 22-Apr-2025
      • Understand the Importance of BGP Weight Path Attribute 16-Apr-2025
      • Configure BGP AS Override in Secure Firewall 12-Apr-2025
      • Configure Advanced Options for BGP on FTD 10-Apr-2025
      • Configure MD5 Authentication Between BGP Peers 02-Apr-2025
      • Configure BGP Multipath in Secure Firewall Threat Defense 19-Mar-2025
      View all documentation of this type
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