CISCO Internet Service Providers Essentials

CISCO Internet Service Providers Essentials

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Description

CiscoA (R) IOS software is extensive and it can often be difficult to navigate through the detailed documentation. CiscoA (R) ISP Essentials takes those elements of IOS software that are of specific interest to ISPs and highlights many of the essential features that are in everyday use in the major ISP backbones. This book not only helps ISPs navigate this complex and detailed world to quickly gather the knowledge they require, but is also helps them harness the full feature-rich value by helping them identify and master those features that are of value to their particular area of interest and need.show more

Product details

  • Paperback | 448 pages
  • 185.4 x 231.1 x 25.9mm | 739.33g
  • Pearson Education (US)
  • Cisco Press
  • Indianapolis, United States
  • English
  • w. figs.
  • 1587050412
  • 9781587050411

Table of contents

Introduction. 1. Software and Router Management. Which Cisco IOS Software Version Should I Be Using? Where to Get Information on Release 12.0S. Further Reference on IOS Software Releases. IOS Software Management. Flash Memory. System Memory. When and How to Upgrade. Copying New Images to Flash Memory. Configuration Management. NVRAM, TFTPserver, and FTPserver. Large Configurations. Command-Line Interface. Editing Keys. CLI String Search. Detailed Logging. Syslog Topologies. Analyzing Syslog Data. Network Time Protocol. NTP Architecture. Client/Server Models and Association Modes. Implementing NTP on an ISP's Routers. NTP Deployment Examples. NTP in a PoP (Example). Further NTP References. Simple Network Management Protocol. SNMP in Read-Only Mode. SNMP in Read-Write Mode. SNMP and Commercial Network Management Software. HTTP Server. Core Dumps. Conclusion. Endnotes. 2. General Features. IOS Software and Loopback Interfaces. Motivation for Using the Loopback Interface. BGP Update Source. Router ID. Exception Dumps by FTP. TFTP Server Access. SNMP Server Access. TACACS/RADIUS Server Source Interface. NetFlow Flow Export. NTP Source Interface. Syslog Source Interface. Telnet to the Router. RCMD to the Router. Interface Configuration. Description. Bandwidth. ip unnumbered. Interface Status Checking. show interface switching. show interface stats. show idb. Cisco Express Forwarding. NetFlow. NetFlow Feature Acceleration. NetFlow Statistics-Basics. NetFlow Data Export. Turn On Nagle. DNS and Routers. Mapping IP Addresses to Names. DNS Resolver in IOS Software. Conclusion. Endnotes. 3. Routing Protocols. CIDR Features. IP Classless. The Zero IP Subnet. Selective Packet Discard. Hot Standby Routing Protocol. IP Source Routing. Configuring Routing Protocols. Router ID. Choosing an IGP. Putting Prefixes into the IGP. IGP Summarization. IGP Adjacency Change Logging. Putting Prefixes into BGP. IGP Configuration Hints. Network Design. Prefix Types. Configuring OSPF. Configuring IS-IS. Configuring EIGRP. Design Summary. The BGP Path-Selection Process. The BGP Best-Path Algorithm for IOS Software. BGP Features and Commands. Stable iBGP Configuration. BGP Autosummary. BGP Synchronization. BGP Community Format. BGP Neighbor Shutdown. BGP Dynamic Reconfiguration. BGP Route Reflectors and the BGP Cluster ID. next-hop-self. BGP Route Flap Damping. BGP Neighbor Authentication. BGP MED Not Set. BGP Deterministic MED. Comparing Router IDs. BGP network Statement. Removing Private Autonomous Systems. BGP local-as. BGP Neighbor Changes. Limiting the Number of Prefixes from a Neighbor. Limiting the AS Path Length from a Neighbor. BGP fast-external-fallover. BGP Peer Group. BGP Multipath. Applying Policy with BGP. Using Prefix Lists in BGP Route Filtering. BGP Filter Processing Order. BGP Conditional Advertisement. BGP Outbound Route Filter Capability. BGP Policy Accounting. Configuration. Displaying BGP Policy Accounting Status. Displaying BGP Policy Accounting Statistics. Multiprotocol BGP. Motivation for a New CLI. Command Group Organization. Comparison Between Old and New Styles. Upgrading to the New CLI. Examples of the New CLI in Use. Summary. Endnotes. 4. Security. Securing the Router. Unneeded or Risky Global Services. Unneeded or Risky Interface Services. Cisco Discovery Protocol. Login Banners. Use enable secret. The ident Feature. SNMP Security. Using the trap-source loopback 0. Router Access: Controlling Who Can Get into the Router. Principles. VTY and Console Port Timeouts. Access Lists on the VTY Ports. VTY Access and SSH. User Authentication. Using AAA to Secure the Router. Router Command Auditing. One-Time Password. Managing ICMP Unreachables from the Router. Building a New Router or Switch. Securing the Routing Protocol. Authenticating Routing Protocol Updates. Securing the Network. Egress and Ingress Filtering. Route Filtering. Packet Filtering. Access Control Lists: General Sequential-Based ACLs. Access Control Lists: Turbo ACLs. ASIC-Based ACLs. Using ACLs for Egress Packet Filtering: Preventing Transmission of Invalid IP Addresses. Using ACLs for Ingress Packet Filtering: Preventing Reception of Invalid IP Addresses. Black-Hole Routing as a Packet Filter (Forwarding to Null0). BCP 38 Using Unicast RPF. Background. Routing Tables Requirements. BCP 38 Implementation with uRPF Strict Mode. Committed Access Rate to Rate-Limit or Drop Packets. The Smurf Attack. Rate-Limiting with CAR. Smurf Defense Summary. Reacting to Security Incidents. Approaches. Some Examples. Summary. Endnotes. 5. Operational Practices. Point-of-Presence Topologies. Core. Distribution. Access. Hosting. Commentary. Point-of-Presence Design. Backbone Network Design. ISP Services. DNS. Mail. News. Keeping Software Up-to-Date. IPv4 Addressing in an ISP Backbone. Business Model and IP Address Space. Address Plan. Putting Together an Address-Deployment Plan. Address Space for Customers. Applying to the RIRs or Upstream ISP for Addresses. Conclusion. Interior Routing. The ISP IGP Versus BGP Model. Scaling Interior Routing Protocols. Exterior Routing. AS Number. Scalable External Peering. Multihoming. Basics. Multihoming Options. Multihoming to the Same ISP. Multihoming to Different ISPs. Outbound Traffic Load Sharing. Using Communities. Security. ISP Border Packet Filters. Aggregation Router Filters. Customer Router Filters. ISP Server Considerations. Firewalls. Remote Access. Out-of-Band Management. Modem. Console Server. Out-of-Band ISDN. Out-of-Band Circuits. Testing Out of Band. Commentary. Test Laboratory. Testing New Hardware and Software. Designing a Test Lab. Commentary. Operational Considerations. Maintenance. Network Operations Versus Customer Support. Engineering. Change Management. Summary. Endnotes. Appendix A. Access Lists and Regular Expressions. Appendix B. Cut-and-Paste Templates. Appendix C. Example Configurations. Appendix D. Route Flap Damping. Appendix E. Traffic Engineering Tools. Appendix F. Example ISP Access Security Migration Plan. Glossary. Technical References and Recommended Reading. Index.show more

About Barry Greene

Barry Raveendran Greene, Senior Consultant, Cisco Systems, Corporate Consulting, Office of the Chief Technology Officer (CTO). Barry's current topics of interest are ISP Operations and Security, developing the features, functionality, and techniques to enhance an ISP's success. Barry has been with Cisco since 1996, traveling to all parts of the world helping ISPs and Telcos build the Internet. Barry is the co-coordinator for the Cisco ISP Workshop Program, designed to empower engineering talent in ISPs all over the world. He has more than 22 years experience in systems integration, security, operations, maintenance, management, and training on a variety of computer, internetworking, and telecommunications technologies. Philip Smith joined Cisco Systems in January 1998. He is a member of the Internet Architectures Group of Consulting Engineering, reporting into the Office of the CTO. His role includes working with many ISPs in the Asia Pacific region and the rest of the world, specifically in network strategies, design, technology, and operations, as well as helping with network configuration and scaling. He is also involved in training ISP engineers, co-founded the Cisco ISP Workshop Program, and provides ISP training at conferences and other networking forums around the world. Prior to joining Cisco, he spent five years at PIPEX (now part of UUNET's global ISP business), the UK's first commercial ISP. He was one of the first engineers working in the commercial Internet in the UK and played a key role in building the modern Intenet in Europe. Philip holds a Doctor of Philosophy and has a First-Class Honours Degree in Physics. He lives in Brisbane, Australia.show more