| 配置思科路由边界网关协议 |
Exam 642-661：
Configuring BGP on Cisco Routers Exam (BGP) |
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| 基础介绍 |
| CCIP认证的必要组成部分，在这门课程中间，学员将学习如何建立和配置思科路由器中的关键协议-边界网关协议(BGP),是CCIP的四门必考科目之一. |
考试摘要 |
| BGP is a qualifying exam for CCIP? certification.
The BGP exam (642-661) will test on material covered under
the Configuring BGP on Cisco Routers (BGP) v 3.0 course.
The BGP |
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| exam assesses a candidate's understanding of the theory
of BGP, ability to configure BGP on Cisco IOS routers,
and skills with troubleshooting on BGP. As a routing protocol,
BGP is one of the underlying foundations of the Internet
and new-world technologies. |
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| 考试范围 |
BGP Overview
Introduction to BGP
Given a network scenario, identify appropriate BGP usage
and its limitations
BGP Session Establishment
Given a typical BGP network scenario, describe the concept
of BGP neighbors and the neighbor session establishment
procedures
BGP Route Processing
Given a diagram of an operational BGP network, describe
interdomain route processing, route propagation and BGP
path selection
Basic BGP Configuration
Given a network consisting of multiple domains, successfully
configure BGP
Monitoring and Troubleshooting BGP
Given a configured BGP network, verify proper operation
and perform the steps necessary to correct basic BGP configuration
errors
Route Selection Using Policy Controls
Multi-Homed BGP Networks
Given a customer scenario where connections to multiple
ISPs must be supported, describe the need for influencing
BGP route selection
AS-Path Filters
Given a customer scenario where connections to multiple
ISPs must be supported, successfully configure BGP to
influence route selection using AS path filters
Prefix-List Filters
Given a customer scenario where connections to multiple
ISPs must be supported, successfully configure BGP to
influence route selection using prefix-list filters
Outbound Route Filtering
Given an operational BGP network, use outbound route filtering
to minimize the impact of BGP routing updates on router
resources
Route-Maps as BGP Filters
Given a typical BGP network, correctly configure BGP to
influence route selection using route maps
Implementing Changes in BGP Policy
Given a typical BGP network, configure the route-refresh
feature to minimize the impact of expediting BGP policy
updates
Route Selection Using Attributes
BGP Path Attributes
List BGP path attributes and functionality of each attribute
Influencing BGP Route Selection with Weights
Given a customer scenario where multiple connections must
be supported, successfully configure BGP to influence
route selection using the weight attribute
BGP Local Preference
Given a customer scenario where multiple connections must
be supported, successfully configure BGP to influence
route selection using the local preference attribute
BGP Multi-Exit-Discriminator (MED)
Given a customer scenario where multiple connections must
be supported, successfully configure BGP to influence
route selection using the Multi-Exit-Discriminator (MED)
attribute
BGP Communities
Given a customer scenario where multiple connections
must be supported, successfully configure BGP to influence
route selection using BGP community attributes
Customer-to-Provider Connectivity with BGP
Customer Connectivity Requirements
Describe the requirements to connect customer networks
to the Internet in a service provider environment
Static Routing Toward the Customer
Given a service provider network, implement customer connectivity
using static routing
BGP Customer Multi-Homed to a Single Service Provider
Given a customer scenario where multiple connections to
a single ISP must be supported, implement customer connectivity
with BGP
BGP Customer Multi-Homed to Multiple Service Providers
Given a customer scenario where connections to multiple
ISPs must be supported, implement customer connectivity
with BGP
BGP Transit Autonomous System
Transit Autonomous System Functions
Describe the function of a transit autonomous system and
the need for IBGP IBGP and EBGP Interaction in a Transit
AS
Given a transit autonomous system, describe the interaction
between EBGP and IBGP in relation to relevant BGP attributes
Packet Forwarding in Transit Autonomous Systems
Describe the function of an IGP in forwarding packets
through an autonomous system
Configuring a Transit Autonomous System
Given a BGP network scenario, successfully configure an
autonomous system to act as a transit backbone
Monitoring and Troubleshooting IBGP in Transit
AS
Given a configured BGP transit network, verify proper
operation and perform the steps necessary to correct basic
IBGP configuration errors
BGP Route Reflectors
Introduction to Route Reflectors
Describe the function and operation of route reflectors
in a BGP environment
Network Design with Route Reflectors
Based upon established route reflector design rules, describe
the concept of hierarchial route reflectors and their
requirements
Configuring and Monitoring Route Reflectors
Given an existing IBGP network, configure and verify proper
operation of route reflectors to modify IBGGP split-horizon
rules
Advanced BGP Configuration
Limiting the Number of Prefixes Received from a BGP Neighbor
Given a typical BGP network, successfully configure BGP
to limit the number of prefixes received from a neighbor
AS-Path Prepending
Given a typical service provider network with connections
to multiple autonomous systems, use AS-Path prepending
to influence the return path selected by the neighboring
autonomous systems
BGP Peer Group
Given a typical BGP network, use BGP peer groups to share
common configuration parameters between multiple BGP peers
BGP Route Flap Dampening
Given a properly configured BGP network, use route flap
dampening to minimize the impact of unstable routes
Scaling IGP and BGP in Service Provider Networks
Common Routing Issues in Service Provider Networks
Describe common routing concerns of service provider networks
Optical Networking Designs
Describe the scalability issues of using OSPF and IS-IS
as interior gateway protocols in a service provider network
and list solutions for each
Scaling BGP in Service Provider Networks
Describe common scalability issues when using BGP in a
service provider network and list solutions for each
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