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Table of Contents
- play_arrow Overview
- play_arrow Introduction to IS-IS
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- play_arrow Monitoring and Troubleshooting Network Issues
- play_arrow Monitoring Networks
- play_arrow Troubleshooting Network Issues
- Working with Problems on Your Network
- Isolating a Broken Network Connection
- Identifying the Symptoms of a Broken Network Connection
- Isolating the Causes of a Network Problem
- Taking Appropriate Action for Resolving the Network Problem
- Evaluating the Solution to Check Whether the Network Problem Is Resolved
- play_arrow Troubleshooting IS-IS
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- play_arrow Configuration Statements and Operational Commands
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Understanding Forwarding Adjacencies
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24-Nov-23
A forwarding adjacency is a traffic engineering label-switched path (LSP) that is configured between two nodes and that is used by the interior gateway protocol (IGP) to forward traffic.
When you set up MPLS traffic-engineering tunnels between sites, by default the IGP does not consider those tunnels for traffic forwarding. Forwarding adjacencies allow you to treat a traffic engineering LSP tunnel as a link in an IGP topology. The link is used in the shortest-path-first (SPF) algorithm and is advertised to the IGP peers. A forwarding adjacency can be created between routing devices regardless of their location in the network.
