Detailed Outlines
Course Outlines
1. BGP Overview
- Session Establishment
- Path Attributes
- Route Processing
- Basic Configuration
- Monitoring and Troubleshooting
2. BGP Transit Autonomous Systems
- Working with a Transit AS
- Interacting with IBGP and EBGP in a Transit AS
- Forwarding Packets in a Transit AS
- Configuring a Transit AS
- Monitoring and Troubleshooting IBGP in a Transit AS
3. Route Selection Using Policy Controls
- Multihomed BGP Networks
- Employing AS Path Filters
- Filtering with Prefix Lists
- Outbound Route Filtering
- Applying Route Maps as BGP Filters
- Implementing Changes in BGP Policy
4. Route Selection Using Attributes
- BGP Route Selection with Weights
- BGP Local Preference
- AS-Path Prepending
- BGP Multi-Exit Discriminator (MED)
- Addressing BGP Communities
5. Customer-to-Provider Connectivity with BGP
- Customer-to-Provider Connectivity Requirements
- Implementing Customer Connectivity Using Static Routes
- Connecting a Multihomed Customer to Single or Mulitple Service Providers
6. Scaling Service Provider Networks
- Scaling IGP and BGP in Service Provider Networks
- Designing Networks and Route Reflectors
- Configuring and Monitoring Route Reflectors
- Configuring and Monitoring Confederations
7. Optimizing BGP Scalability
- Improving BGP Convergence
- Limiting the Number of Prefixes Received from a BGP Neighbor
- Implementing BGP Peer Groups
- BGP Route Dampening
Labs
Lab 1: Network Setup
- Establish physical connectivity between routers
- Configure IP addressing
- Enable an Interior Routing Protocol
- Verify routing
Lab 2: Configuring EBGP Peerings
- Create two EBGP peerings
- Advertise networks into BGP
- Redistribute your IGP into BGP
- Examine the effects of BGP auto-summarization
- Summarize routes to your neighbor
Lab 3: Configuring IBGP Peerings
- Configure an IBGP peering with another edge router
- Peering with loopback interfaces
- Examine effect of BGP synchronization
- Discover BGP next-hop behavior
- Examine the effects of multihoming on path selection
Lab 4: Using AS-Path Filters and Regular Expressions
- Filter updates to external routers
- Manipulate path selection using AS-path filters and regular expressions
Lab 5: Using Prefix Lists
- Filter advertised AS routes using prefix lists
Lab 6: Soft Reconfiguration and Route Refresh
- Monitor and verify the actions of BGP Route Refresh
- Configure BGP soft inbound reconfiguration
Lab 7: Configuring the Weight Attribute
- Configure a second BGP peering for each router
- Set a weight value for routes received from each EBGP neighbor
- Monitor the resulting path choice
Lab 8: Configuring the Local Preference Attribute
- Use the Local Preference attribute to control BGP path selection
Lab 9: AS-Path Prepending
- Configure AS-Path Prepending to make one path into your AS look more attractive than the other
Lab 10: Configuring the Multi-Exit Discriminator (MED) Attribute
- Use the MED attribute to influence the BGP path selection by routers in neighboring systems
Lab 11: Using the Community Attribute
- Configure the community attribute in setting local preference BGP policies
Lab 12: Becoming a Service Provider
- Configure your AS as a service provider
- Configure full-mesh IBGP
- Determine appropriate filters for routing updates to and from your customer
- Configure and apply filters
Lab 13: Using Route Reflectors
- Configure a hierarchical route reflector structure
- Examine the effects of route reflectors on routing updates
Lab 14: Using Confederations
- Divide your AS into confederations
- Configure intra- and inter-confederation peerings
- Configure peering with external neighbors
- Examine the effects of confederation on routing updates
Lab 15: Monitoring and Tuning BGP Resource Use
- Examine the effects of BGP session establishment and route updates on router resources
- Examine how timers speed BGP convergence
- Set a maximum prefix value
Lab 16: Using Peer Groups
- Place neighboring BGP routers into peer groups
- Apply policy configuration to peer groups
Lab 17: Using Route Dampening
- Configure and apply route dampening to external peers
- Monitor the results when that peer's routes flap
Objectives and Pre-requisites
Course Objectives
- Configure, monitor and troubleshoot basic BGP to enable interdomain routing, given a network scenario with multiple domains
- Use BGP policy controls to influence the route selection process with minimal impact on BGP route processing, given a network scenario where connections to multiple ISPs must be supported
- Use BGP attributes to influence the route selection process, given a network scenario where multiple connections must be supported
- Implement the correct BGP configuration to successfully connect the customer's network to the Internet, given customer connectivity requirements
- Enable the provider network to behave as a transit autonomous system, given a typical service provider network with multiple BGP connections to other autonomous systems
- Identify common BGP scaling issues and enable route reflection and confederations as possible solutions to these issues, given a typical service provider network
- Use available BGP tools and features to optimize the scalability of the BGP routing protocol, given a typical BGP network
Prerequisites
The knowledge and skills you must have before attending this course are as follows:
- Interconnecting Cisco Network Devices Part 1, Version 2.0 (ICND1)
- Interconnecting Cisco Network Devices Part 2, Version 2.0 (ICND2)
- Implementing Cisco IP Routing (ROUTE)
