Cisco NCS 5500 Series Configuration Guide

CONTENTS
Preface Preface ix
Changes to This Document ix
Obtaining Documentation and Submitting a Service Request ix
CHAPTER 1 New and Changed BGP Features 1
New and Changed BGP Features 1
CHAPTER 2 Implementing BGP 3
BGP Functional Overview 3
Enable BGP Routing 4
Adjust BGP Timers 7
Change BGP Default Local Preference Value 8
Configure MED Metric for BGP 9
Configure BGP Weights 10
Tune BGP Best-Path Calculation 11
Set BGP Administrative Distance 13
Indicate BGP Back-door Routes 14
Configure Aggregate Addresses 16
Autonomous System Number Formats in BGP 18
2-byte Autonomous System Number Format 18
4-byte Autonomous System Number Format 18
as-format Command 18
BGP Multi-Instance and Multi-AS 18
Configure Multiple BGP Instances for a Specific Autonomous System 19
BGP Routing Domain Confederation 20
Configure Routing Domain Confederation for BGP 20
BGP Additional Paths 23
BGP Configuration Guide for Cisco NCS 5500 Series Routers, IOS XR Release 6.2.x
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Cisco NCS 5500 Series Specifications

General

Series	NCS 5500
Category	Network Router
Operating System	Cisco IOS XR
Product Type	Modular Router
Form Factor	Rack-mountable
Purpose	High-performance routing for service providers and large enterprises
Interface Types	Ethernet
Redundancy	Redundant power supplies and fan trays
Port Density	Varies by model; high-density configurations available
Routing Protocols	BGP, OSPF, IS-IS, MPLS
Power Supply Options	AC and DC power supplies available
Management	CLI, SNMP, NETCONF