Border Gateway Protocol (BGP)

BGP is how many organizations connect to the internet. A misconfigured peering, an address family that was never activated, or a route map that has gone wrong can cut off public services or quietly route traffic down the wrong carrier. Many enterprises leave this work with one senior engineer or an outside contractor, which creates risk every time a circuit, carrier, or SD-WAN design changes.

Role fit: This is engineer-level training for Network Engineers and IT Practitioners with at least a year of network infrastructure experience. It suits teams that run multi-homed or multi-carrier edge routing, data center uplinks, or SD-WAN. It also gives Team Leads a shared method for building and troubleshooting BGP configurations.

Time investment: Plan for about 21 hours across 17 skills per learner. Training Managers can assign the paths in stages:

• Foundations and IPv4/IPv6 configuration
• Policy, filtering, and scalability
• Design, troubleshooting, and multi-carrier load balancing

Change-management notes:

• The course emphasizes that BGP is deliberate: teams explicitly configure neighbors, networks, and per-neighbor behavior.
• It stresses methodical, repeatable configuration habits for peerings, routing policy, and filtering.
• It covers core BGP operations, including path selection, address families, and scalability considerations.

These habits support clearer change windows and fewer avoidable outages.

Virtual labs are used throughout the course. Engineers build BGP neighbor relationships and practice configuration work in a lab environment before they touch production routers.

IT teams use this training to keep internet-facing and multi-site routing stable when the stakes are real. Instructors work through scenarios network engineers face in production: a data center moving from static routes to BGP sessions, enterprises peering with one or more ISPs, and multi-carrier environments where routing policy has to match real operational constraints.

• Multi-carrier redundancy that actually works. Your team works through redundancy and load balancing across multiple carriers for public addresses, including tuning inbound and outbound traffic when the setup isn't as clean as a configuration guide. They then validate results with a BGP looking glass workflow that compares BGP tables from routers in multiple locations, including North America and Europe.
• Faster root-cause isolation during outages. Troubleshooting walkthroughs cover what goes wrong in the field: address families that were never activated, a misconfigured route reflector, a route map gone awry, and peers in the wrong AS. Engineers learn to read neighbor logs and show commands so they reach root cause sooner.
• Safer changes in production. Training points out operations that are fine in a lab but dangerous on live networks, such as clearing BGP sessions, and shows how to watch BGP CPU and memory use in large environments.
• Designs that scale. Teams learn why full-mesh iBGP stops working as router counts grow, how route reflectors and confederations address it, how summarization keeps routing tables clean, and how to keep an enterprise from becoming a transit network. These skills also carry over to SD-WAN deployments.

Instructor-led configuration walkthroughs on lab and real equipment help engineers turn BGP concepts into reliable, repeatable implementation patterns.

Knowledge

• How BGP forms neighbor relationships, the differences between iBGP and eBGP peerings, and how sessions are established and verified
• How path attributes are classified, including well-known mandatory attributes, and how the best path selection algorithm chooses routes
• How address families, including IPv4 and IPv6 unicast, control what each peer exchanges, and why an unactivated address family silently breaks route exchange
• Why full-mesh iBGP can become difficult to manage at scale, and how BGP scalability features help address larger designs
• Enterprise design considerations for single-ISP and dual-ISP connections, including how to keep the network from becoming a transit network
• Which BGP features carry over into SD-WAN deployments

Ability

• Configure iBGP and eBGP neighbors, including multi-hop peering to loopbacks, on Cisco routers from the CLI
• Advertise and summarize IPv4 and IPv6 networks with network statements and aggregation to meet carrier prefix-length requirements
• Apply route filtering and Cisco routing policy to control traffic, using BGP path attributes and route maps to influence outbound and inbound path behavior
• Troubleshoot broken or poorly performing BGP, such as wrong peer AS numbers, address family issues, route advertisement problems, and faulty route maps, using show commands and logs
• Balance traffic across multiple carriers and verify outbound and inbound path behavior with BGP routing information
• Monitor BGP CPU and memory use, and avoid disruptive session clears in production