Troubleshooting BGP [IP Routing]

Document ID: 22166

Interactive: This document offers customized analysis of your Cisco device.

Introduction
Before You Begin
      Conventions
      Prerequisites
      Components Used
Main Troubleshooting Flowchart
Troubleshooting BGP Neighbor Establishment
Troubleshooting Routes Missing from the Routing Table
Troubleshooting Multihoming Inbound
Troubleshooting BGP Route Advertisement
Troubleshooting Multihoming Outbound
Related Information

Introduction

This document provides troubleshooting information for common problems with Border Gateway Protocol (BGP). To see more information, or to go to the next flowchart, click the command boxes in red.

If you have the output of a show ip bgp, show ip bgp neighbor, show ip bgp summary, or show tech-support command from your Cisco device, you can use to display potential issues and fixes. To use , you must be a registered customer, be logged in, and have JavaScript enabled.

Before You Begin

Conventions

For more information on document conventions, see the Cisco Technical Tips Conventions.

Prerequisites

There are no specific prerequisites for this document.

Components Used

This document is not restricted to specific software and hardware versions.

The information presented in this document was created from devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If you are working in a live network, ensure that you understand the potential impact of any command before using it.