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Short Contents

Entire manual as PDF [3292 KB]

Chapter: About This Guide

[PDF 36 KB]

ERX Edge Routers

Audience

Conventions

Documentation

Abbreviations

Using the Online Documentation CD

Comments About the Documentation

Chapter: Configuring BGP Routing

[PDF 1046 KB]

Overview

Conventions in This Chapter

Autonomous Systems

BGP Speaker

BGP Peers and Neighbors

BGP Session

IBGP and EBGP

Internal Gateway Protocols

BGP Messages

BGP Route

Routing Information Base

Prefixes and CIDR

Path Attributes

Transit and Nontransit Service

References

Features

Before You Configure BGP

Configuration Tasks

Basic Configuration

Enabling BGP Routing

Understanding BGP Command Scope

Inheritance of Configuration Values

Limitations on Inheritance

Setting the BGP Identifier

Configuring Neighbors

Assigning a Description

Logging Neighbor State Changes

Specifying a Source Address for a BGP Session

Specifying Peers That Are Not Directly Connected

Controlling the Number of Prefixes

Removing Private AS Numbers from Updates

Checking AS Path Length

Enabling MD5 Authentication on a TCP Connection

Setting the Maximum Size of Update Messages

Setting Memory Limits for BGP Tables

Setting Automatic Fallover

Setting Timers

Automatic Summarization of Routes

Administrative Shutdown

Configuring BGP for Overload Conditions

Enabling Storage in Peer RIBs-Out Tables

Effects of Changing Outbound Policies

Configuring the Address Family

Advertising Routes

Prefixes Originating in an AS

Redistributing Routes into BGP

Redistributing Routes from BGP

Configuring a Default Route

Advertising Default Routes

Redistributing Default Routes

Setting a Static Default Route

Setting the Minimum Interval Between Sending Routing Updates

Aggregating Routes

Advertising Inactive Routes

Verifying AS Path

Configuring BGP Routing Policy

Types of BGP Route Maps

Access Lists

Filtering Prefixes

Filtering AS Paths with a Filter List

Filtering AS Paths with a Route Map

Configuring the Community Attribute

Community Lists

Resetting a BGP Connection

Changing Polices Without Disruption

Soft Reconfiguration

Route-Refresh Capability

Configuring Route Flap Dampening

Global Route Flap Dampening

Policy-Based Route Flap Dampening

Applying Table Maps

Selecting the Best Path

The BGP Path Decision Algorithm

Configuring Next-Hop Processing

Next Hops

Next-Hop-Self

Assigning a Weight to a Route

Using the neighbor weight Command

Using a Route Map

Using an AS-Path Access List

Configuring the Local-Pref Attribute

Using the bgp default local-preference Command

Using a Route Map to Set the Local Preference

Understanding the Origin Attribute

Understanding the AS-path Attribute

Configuring a Local AS

Configuring the MED Attribute

Missing MED Values

Comparing MED Values Within a Confederation

Capability Negotiation

Route Refresh

Interactions Between BGP and IGPs

Synchronizing BGP with IGPs

Disabling Synchronization

Setting the Administrative Distance for a Route

Configuring Backdoor Routes

Setting the Maximum Number of Equal-Cost Multipaths

Configuring BGP Peer Groups

Managing a Large-Scale AS

Configuring a Confederation

Configuring Route Reflectors

Route Reflection and Redundancy

Route Reflection and Looping

Configuring BGP Multicasting

Monitoring BGP Multicast Services

Using BGP Routes for Other Protocols

Configuring BGP/MPLS VPNs

Monitoring BGP

Chapter: Configuring MPLS

[PDF 456 KB]

Overview

Conventions in This Chapter

Terms

IP Routing

Label Switching

Label-Switching Routers

Labels

Label Distribution Methodology

Mapping Data

Tunnel Endpoints

Label Distribution Protocols

LDP Messages and Sessions

RSVP-TE Messages and Sessions

Features

Traffic Engineering

LSP Backup

Path Option

Reoptimization

Tracking Resources for Traffic Engineering

Starting Admission Control

Admission Control Interface Table

Configuring Traffic-Engineering Resources

Monitoring Resources

LSP Preemption

References

Configuration Tasks

Global Configuration Tasks

Interface Configuration Tasks

Tunnel Configuration Tasks

Tunnel Profile Configuration Tasks

Explicit Routing

Defining Configured Explicit Paths

Specifying Configured Explicit Paths on a Tunnel

Configuring Dynamic Explicit Paths on a Tunnel

Monitoring Explicit Paths

Configuring Virtual Private Networks

Virtual Router Model

VPN Stacking

BGP

CR-LDP

Configuring VPNs Using the VR Model

Configuring VPNS with CR-LDP

Targeted Sessions to Directly Connected Peers

Configuring IGPs and MPLS

Configuring the IGPs for Traffic Engineering

Monitoring Traffic Engineering

MPLS and Differentiated Services

Monitoring MPLS

Chapter: Configuring BGP/MPLS VPNs

[PDF 441 KB]

Overview

Address Families

BGP/MPLS VPN Components

VPN-IPv4 Addresses

Route Targets

Distribution of Routes and Labels via BGP

Transporting Packets Across an IP Backbone via MPLS

References

Configuring BGP VPN Services

VRF Configuration Tasks

PE Configuration Tasks

Creating a VRF

Specifying a Route Distinguisher

Defining Route Targets for VRFs

Setting Import and Export Maps for a VRF

Assigning an Interface to a VRF

Adding Static Routes to a VRF

Configuring IGPs on the VRF

Configuring the IGP in the VRF Context

Configuring the IGP outside the VRF Context

Disabling Automatic Route-Target Filtering

Configuring PE-to-PE LSPs

Enabling BGP Routing

Enabling VPN Address Exchange

Configuring PE-to-CE BGP Sessions

Advertising Static Routes to Customers

Advertising IGP Routes to Customers

Disabling the Default Address Family

Using a Single ASN for all CE sites

Advertising Prefixes with Duplicate AS Numbers

Deleting Routes for a VRF

OSPF and BGP/MPLS VPNs

Distributing OSPF routes from CE to PE

Distributing routes Between PEs

Preserving OSPF Routing Information Across the MPLS/VPN Backbone

OSPF Domain Identifier Attribute

OSPF Route Type Attribute

Distributing OSPF routes from PE to CE

Preventing Routing Loops

Configuration Tasks

Monitoring BGP/MPLS VPNs

Chapter: Index

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