A detailed study of BGP and core MPLS, from the basics of how it works through to advanced issues such as route reflectors, policy, filtering, route selection and routing registries. Practical hands on with Cisco routers follow the major sessions to reinforce the theory. Juniper configurations are also explored in the theory sessions.

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Delegates will learn how to

By the end of the course delegates will be able to:

  • Connect enterprises to the Internet, and ISPs to each other.
  • Describe how BGP works. List, describe and configure the main BGP attributes.
  • Implement and troubleshoot BGP.
  • Work with route aggregation and calculate CIDR prefixes in seconds.
  • Influence traffic paths with BGP.
  • Implement and troubleshoot MPLS.
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Basic BGP

IGPs, EGPs, What’s BGP? BGP RIB, in/out process, tables peers, adding routes.

Simple configuration and troubleshooting.

The Internet and peering

ASs, AS numbers, Internet structure, ISP types, ISP network design, IXs, peering vs. transit, public/private peering, bi/multi-lateral peering.

How BGP works

Incremental updates, Path vector protocols, BGP protocol stack, the BGP header, message types, NLRI, withdrawn routes, route refresh, route dampening.

More troubleshooting, packet analysis.


Multiprotocol routing, AFI, SAFI, MBGP and multicasts, IPv6, MPLS VPNs.


BGPv4 aggregation

CIDR, benefits, techniques, shortcuts, configuring BGP aggregation, leaking routes.

Reducing routing table size.

BGP path selection

BGP attributes, attribute types, route selection order, Local preference, AS prepend, MEDs.

Influencing traffic with BGP.

BGP routing policies

What is policy? Examples, route filtering, AS filtering, REs, applying preference selectively, peer groups.

Sophisticated policies.

RIPE and routing registries

RIRs, Allocations, assignments, PI vs. PA. Objects, RPSL, whois, routing registry, IRRToolSet.

The RIPE database.

Automating BGP configuration

Automation tools, Bogon lists, tracking bogon lists, HTTP, Peering, routing registries, DNS.


What is a community? Community names, communities for: peer types and geography. RFC 1998, default communities.

Setting local preference on other routers.

Route servers

What are route servers? LINX route servers, route server policy control, What are route collectors, Looking glasses.

Setting up and working with a route server.

Peer relationships

IBGP, EBGP, next hop self, advertising routes into/out of BGP, synchronisation.

IBGP, troubleshooting a large BGP network.

Route reflectors and confederations

Full mesh IBGP, Route reflectors, RR configuration and design, confederations, migration issues.

RR configuration.

BGP architectures

Stub vs. transit AS, when to use BGP, multihoming strategies and issues, default routes. Multihop EBGP, load balancing.


BGP security

RFC 7454, security steps, BGP TTL security, filters, RPKI, ROAs, rsync, rrdp, validators. A secure BGP template.

RPKI prefix validation.

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Why choose QA

Dates & Locations

Need to know

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