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Tuesday, September 21, 2010

Cisco CookBook

















Cisco Cookbook
By Ian J. Brown, Kevin Dooley

Publisher : O'Reilly
Pub Date : July 2003
ISBN : 0-596-00367-6


Copyright
Preface
Organization
What's in This Book
Conventions
Comments and Questions
Acknowledgments
Chapter 1. Router Configuration and File Management
Introduction
Recipe 1.1. Configuring the Router via TFTP
Recipe 1.2. Saving Router Configuration to Server
Recipe 1.3. Booting the Router Using a Remote Configuration File
Recipe 1.4. Storing Configuration Files Larger than NVRAM
Recipe 1.5. Clearing the Startup Configuration
Recipe 1.6. Loading a New IOS Image
Recipe 1.7. Booting a Different IOS Image
Recipe 1.8. Booting Over the Network
Recipe 1.9. Copying an IOS Image to a Server
Recipe 1.10. Copying an IOS Image Through the Console
Recipe 1.11. Deleting Files from Flash
Recipe 1.12. Partitioning Flash
Recipe 1.13. Using the Router as a TFTP Server
Recipe 1.14. Using FTP from the Router
Recipe 1.15. Generating Large Numbers of Router Configurations
Recipe 1.16. Changing the Configurations of Many Routers at Once
Recipe 1.17. Extracting Hardware Inventory Information
Recipe 1.18. Backing Up Router Configurations
Chapter 2. Router Management
Introduction
Recipe 2.1. Creating Command Aliases
Recipe 2.2. Managing the Router's ARP Cache
Recipe 2.3. Tuning Router Buffers
Recipe 2.4. Using the Cisco Discovery Protocol
Recipe 2.5. Disabling the Cisco Discovery Protocol
Recipe 2.6. Using the Small Servers
Recipe 2.7. Enabling HTTP Access to a Router
Recipe 2.8. Using Static Hostname Tables
Recipe 2.9. Enabling Domain Name Services
Recipe 2.10. Disabling Domain Name Lookups
Recipe 2.11. Specifying a Router Reload Time
Recipe 2.12. Creating Exception Dump Files
Recipe 2.13. Generating a Report of Interface Information
Recipe 2.14. Generating a Report of Routing Table Information
Recipe 2.15. Generating a Report of ARP Table Information
Recipe 2.16. Generating a Server Host Table File
Chapter 3. User Access and Privilege Levels
Introduction
Recipe 3.1. Setting Up User IDs
Recipe 3.2. Encrypting Passwords
Recipe 3.3. Using Better Encryption Techniques
Recipe 3.4. Removing Passwords from a Router Configuration File
Recipe 3.5. Deciphering Cisco's Weak Password Encryption
Recipe 3.6. Displaying Active Users
Recipe 3.7. Sending Messages to Other Users
Recipe 3.8. Changing the Number of VTYs
Recipe 3.9. Changing VTY Timeouts
Recipe 3.10. Restricting VTY Access by Protocol
Recipe 3.11. Enabling Absolute Timeouts on VTY Lines
Recipe 3.12. Implementing Banners
Recipe 3.13. Disabling Banners on a Port
Recipe 3.14. Disabling Router Lines
Recipe 3.15. Reserving a VTY Port for Administrative Access
Recipe 3.16. Restricting Inbound Telnet Access
Recipe 3.17. Logging Telnet Access
Recipe 3.18. Setting the Source Address for Telnet
Recipe 3.19. Automating the Login Sequence
Recipe 3.20. Using SSH for Secure Access
Recipe 3.21. Changing the Privilege Level of IOS Commands
Recipe 3.22. Defining Per-User Privileges
Recipe 3.23. Defining Per-Port Privileges
Chapter 4. TACACS+
Introduction
Recipe 4.1. Authenticating Login IDs from a Central System
Recipe 4.2. Restricting Command Access
Recipe 4.3. Losing Access to the TACACS+ Server
Recipe 4.4. Disabling TACACS+ Authentication on a Particular Line
Recipe 4.5. Capturing User Keystrokes
Recipe 4.6. Logging System Events
Recipe 4.7. Setting the IP Source Address for TACACS+ Messages
Recipe 4.8. Obtaining Free TACACS+ Server Software
Recipe 4.9. Sample Server Configuration Files
Chapter 5. IP Routing
Introduction
Recipe 5.1. Finding an IP Route
Recipe 5.2. Finding Types of IP Routes
Recipe 5.3. Converting Different Mask Formats
Recipe 5.4. Using Static Routing
Recipe 5.5. Floating Static Routes
Recipe 5.6. Using Policy-Based Routing to Route Based on Source Address
Recipe 5.7. Using Policy-Based Routing to Route Based on Application Type
Recipe 5.8. Examining Policy-Based Routing
Recipe 5.9. Changing Administrative Distances
Recipe 5.10. Routing Over Multiple Paths with Equal Costs
Chapter 6. RIP
Introduction
Recipe 6.1. Configuring RIP Version 1
Recipe 6.2. Filtering Routes with RIP
Recipe 6.3. Redistributing Static Routes into RIP
Recipe 6.4. Redistributing Routes Using Route Maps
Recipe 6.5. Creating a Default Route in RIP
Recipe 6.6. Disabling RIP on an Interface
Recipe 6.7. Unicast Updates for RIP
Recipe 6.8. Applying Offsets to Routes
Recipe 6.9. Adjusting Timers
Recipe 6.10. Configuring Interpacket Delay
Recipe 6.11. Enabling Triggered Updates
Recipe 6.12. Increasing the RIP Input Queue
Recipe 6.13. Configuring RIP Version 2
Recipe 6.14. Enabling RIP Authentication
Recipe 6.15. RIP Route Summarization
Recipe 6.16. Route Tagging
Chapter 7. EIGRP
Introduction
Recipe 7.1. Configuring EIGRP
Recipe 7.2. Filtering Routes with EIGRP
Recipe 7.3. Redistributing Routes into EIGRP
Recipe 7.4. Redistributing Routes into EIGRP Using Route Maps
Recipe 7.5. Creating a Default Route in EIGRP
Recipe 7.6. Disabling EIGRP on an Interface
Recipe 7.7. EIGRP Route Summarization
Recipe 7.8. Adjusting EIGRP Metrics
Recipe 7.9. Adjusting Timers
Recipe 7.10. Enabling EIGRP Authentication
Recipe 7.11. Logging EIGRP Neighbor State Changes
Recipe 7.12. Limiting EIGRP's Bandwidth Utilization
Recipe 7.13. EIGRP Stub Routing
Recipe 7.14. Route Tagging
Recipe 7.15. Viewing EIGRP Status
Chapter 8. OSPF
Introduction
Recipe 8.1. Configuring OSPF
Recipe 8.2. Filtering Routes in OSPF
Recipe 8.3. Adjusting OSPF Costs
Recipe 8.4. Creating a Default Route in OSPF
Recipe 8.5. Redistributing Static Routes into OSPF
Recipe 8.6. Redistributing External Routes into OSPF
Recipe 8.7. Manipulating DR Selection
Recipe 8.8. Setting the OSPF RID
Recipe 8.9. Enabling OSPF Authentication
Recipe 8.10. Selecting the Appropriate Area Types
Recipe 8.11. Summarizing Routes in OSPF
Recipe 8.12. Disabling OSPF on Certain Interfaces
Recipe 8.13. OSPF Route Tagging
Recipe 8.14. Logging OSPF Adjacency Changes
Recipe 8.15. Adjusting OSPF Timers
Recipe 8.16. Viewing OSPF Status with Domain Names
Recipe 8.17. Debugging OSPF
Chapter 9. BGP
Introduction
Recipe 9.1. Configuring BGP
Recipe 9.2. Using eBGP Multihop
Recipe 9.3. Adjusting the Next-Hop Attribute
Recipe 9.4. Connecting to Two ISPs
Recipe 9.5. Connecting to Two ISPs with Redundant Routers
Recipe 9.6. Restricting Networks Advertised to a BGP Peer
Recipe 9.7. Adjusting Local Preference Values
Recipe 9.8. Load Balancing
Recipe 9.9. Removing Private ASNs from the AS Path
Recipe 9.10. Filtering BGP Routes Based on AS Paths
Recipe 9.11. Reducing the Size of the Received Routing Table
Recipe 9.12. Summarizing Outbound Routing Information
Recipe 9.13. Prepending ASNs to the AS Path
Recipe 9.14. Redistributing Routes with BGP
Recipe 9.15. Using Peer Groups
Recipe 9.16. Authenticating BGP Peers
Recipe 9.17. Putting It All Together
Chapter 10. Frame Relay
Introduction
Recipe 10.1. Setting Up Frame Relay withPoint-to-Point Subinterfaces
Recipe 10.2. Adjusting LMI Options
Recipe 10.3. Setting Up Frame Relay with Map Statements
Recipe 10.4. Using Multipoint Subinterfaces
Recipe 10.5. Configuring Frame Relay SVCs
Recipe 10.6. Simulating a Frame Relay Cloud
Recipe 10.7. Compressing Frame Relay Data on a Subinterface
Recipe 10.8. Compressing Frame Relay Data with Maps
Recipe 10.9. Viewing Frame Relay Status Information
Chapter 11. Queueing and Congestion
Introduction
Recipe 11.1. Fast Switching and CEF
Recipe 11.2. Setting the DSCP or TOS Field
Recipe 11.3. Using Priority Queueing
Recipe 11.4. Using Custom Queueing
Recipe 11.5. Using Custom Queues with Priority Queues
Recipe 11.6. Using Weighted Fair Queueing
Recipe 11.7. Using Class-Based Weighted Fair Queueing
Recipe 11.8. Controlling Congestion with WRED
Recipe 11.9. Using RSVP
Recipe 11.10. Using Generic Traffic Shaping
Recipe 11.11. Using Frame-Relay Traffic Shaping
Recipe 11.12. Using Committed Access Rate
Recipe 11.13. Implementing Standards-BasedPer-Hop Behavior
Recipe 11.14. Viewing Queue Parameters
Chapter 12. Tunnels and VPNs
Introduction
Recipe 12.1. Creating a Tunnel
Recipe 12.2. Tunneling Foreign Protocols in IP
Recipe 12.3. Tunneling with Dynamic Routing Protocols
Recipe 12.4. Viewing Tunnel Status
Recipe 12.5. Creating an EncryptedRouter-to-Router VPN
Recipe 12.6. Generating RSA Keys
Recipe 12.7. Creating a Router-to-Router VPN with RSA Keys
Recipe 12.8. Creating a VPN Between a Workstation and a Router
Recipe 12.9. Check IPSec Protocol Status
Chapter 13. Dial Backup
Introduction
Recipe 13.1. Automating Dial Backup
Recipe 13.2. Using Dialer Interfaces
Recipe 13.3. Using an Async Modem on the AUX Port
Recipe 13.4. Using Backup Interfaces
Recipe 13.5. Using Dialer Watch
Recipe 13.6. Ensuring Proper Disconnection
Recipe 13.7. View Dial Backup Status
Recipe 13.8. Debugging Dial Backup
Chapter 14. NTP and Time
Introduction
Recipe 14.1. Timestamping Router Logs
Recipe 14.2. Setting the Time
Recipe 14.3. Setting the Time Zone
Recipe 14.4. Adjusting for Daylight Saving Time
Recipe 14.5. Synchronizing the Time on All Routers (NTP)
Recipe 14.6. Configuring NTP Redundancy
Recipe 14.7. Setting the Router as the NTP Master for the Network
Recipe 14.8. Changing NTP Synchronization Periods
Recipe 14.9. Using NTP to Send Periodic Broadcast Time Updates
Recipe 14.10. Using NTP to Send Periodic Multicast Time Updates
Recipe 14.11. Enabling and Disabling NTP Per Interface
Recipe 14.12. NTP Authentication
Recipe 14.13. Limiting the Number of Peers
Recipe 14.14. Restricting Peers
Recipe 14.15. Setting the Clock Period
Recipe 14.16. Checking the NTP Status
Recipe 14.17. Debugging NTP
Chapter 15. DLSw
Introduction
Recipe 15.1. Configuring DLSw
Recipe 15.2. Using DLSw to Bridge Between Ethernet and Token Ring
Recipe 15.3. Converting Ethernet and Token Ring MAC Addresses
Recipe 15.4. Configuring SDLC
Recipe 15.5. Configuring SDLC for Multidrop Connections
Recipe 15.6. Using STUN
Recipe 15.7. Using BSTUN
Recipe 15.8. Controlling DLSw Packet Fragmentation
Recipe 15.9. Tagging DLSw Packets for QoS
Recipe 15.10. Supporting SNA Priorities
Recipe 15.11. DLSw+ Redundancy and Fault Tolerance
Recipe 15.12. Viewing DLSw Status Information
Recipe 15.13. Viewing SDLC Status Information
Recipe 15.14. Debugging DSLw
Chapter 16. Router Interfaces and Media
Introduction
Recipe 16.1. Viewing Interface Status
Recipe 16.2. Configuring Serial Interfaces
Recipe 16.3. Using an Internal T1 CSU/DSU
Recipe 16.4. Using an Internal ISDN PRI Module
Recipe 16.5. Using an Internal 56Kbps CSU/DSU
Recipe 16.6. Configuring an Async Serial Interface
Recipe 16.7. Configuring ATM Subinterfaces
Recipe 16.8. Setting Payload Scrambling on an ATM Circuit
Recipe 16.9. Configuring Ethernet Interface Features
Recipe 16.10. Configuring Token Ring Interface Features
Recipe 16.11. Connecting VLAN Trunks With ISL
Recipe 16.12. Connecting VLAN Trunks with 802.1Q
Chapter 17. Simple Network Management Protocol
Introduction
Recipe 17.1. Configuring SNMP
Recipe 17.2. Extracting Router Information via SNMP Tools
Recipe 17.3. Recording Impotant Router Information for SNMP Access
Recipe 17.4. Extracting Inventory Information from a List of Routers with SNMP
Recipe 17.5. Using Access Lists to Protect SNMP Access
Recipe 17.6. Logging Unauthorized SNMP Attempts
Recipe 17.7. Limiting MIB Access
Recipe 17.8. Using SNMP to Modify a Router's Running Configuration
Recipe 17.9. Using SNMP to Copy a New IOS Image
Recipe 17.10. Using SNMP to Perform Mass Configuration Changes
Recipe 17.11. Preventing Unauthorized Configuration Modifications
Recipe 17.12. Making Interface Table Numbers Permanent
Recipe 17.13. Enabling SNMP Traps and Informs
Recipe 17.14. Sending syslog Messages as SNMP Traps and Informs
Recipe 17.15. Setting SNMP Packet Size
Recipe 17.16. Setting SNMP Queue Size
Recipe 17.17. Setting SNMP Timeout Values
Recipe 17.18. Disabling Link Up/Down Traps per Interface
Recipe 17.19. Setting the IP Source Address for SNMP Traps
Recipe 17.20. Using RMON to Send Traps
Recipe 17.21. Enabling SNMPv3
Recipe 17.22. Using SAA
Chapter 18. Logging
Introduction
Recipe 18.1. Enabling Local Router Logging
Recipe 18.2. Setting the Log Size
Recipe 18.3. Clearing the Router's Log
Recipe 18.4. Sending Log Messages to Your Screen
Recipe 18.5. Using a Remote Log Server
Recipe 18.6. Enabling Syslog on a Unix Server
Recipe 18.7. Changing the Default Log Facility
Recipe 18.8. Restricting What Log Messages Are Sent to the Server
Recipe 18.9. Setting the IP Source Address for Syslog Messages
Recipe 18.10. Logging Router Syslog Messages in Different Files
Recipe 18.11. Maintaining Syslog Files on the Server
Recipe 18.12. Testing the Syslog Sever Configuration
Recipe 18.13. Preventing the Most Common Messages from Being Logged
Recipe 18.14. Rate-Limiting Syslog Traffic
Chapter 19. Access Lists
Introduction
Recipe 19.1. Filtering by Source or Destination IP Address
Recipe 19.2. Adding a Comment to an ACL
Recipe 19.3. Filtering by Application
Recipe 19.4. Filtering Based on TCP Header Flags
Recipe 19.5. Restricting TCP Session Direction
Recipe 19.6. Filtering Multiport Applications
Recipe 19.7. Filtering Based on DSCP and TOS
Recipe 19.8. Logging when an Access List Is Used
Recipe 19.9. Logging TCP Sessions
Recipe 19.10. Analyzing ACL Log Entries
Recipe 19.11. Using Named and Reflexive Access Lists
Recipe 19.12. Dealing with Passive Mode FTP
Recipe 19.13. Using Context-Based Access Lists
Chapter 20. DHCP
Introduction
Recipe 20.1. Using IP Helper Addresses for DHCP
Recipe 20.2. Limiting the Impact of IP Helper Addresses
Recipe 20.3. Using DHCP to Dynamically Configure Router IP Addresses
Recipe 20.4. Dynamically Allocating Client IP Addresses via DHCP
Recipe 20.5. Defining DHCP Configuration Options
Recipe 20.6. Defining DHCP Lease Periods
Recipe 20.7. Allocating Static IP Addresses with DHCP
Recipe 20.8. Configuring a DHCP Database Client
Recipe 20.9. Configuring Multiple DHCP Servers per Subnet
Recipe 20.10. Showing DHCP Status
Recipe 20.11. Debugging DHCP
Chapter 21. NAT
Introduction
Recipe 21.1. Configuring Basic NAT Functionality
Recipe 21.2. Allocating External Addresses Dynamically
Recipe 21.3. Allocating External Addresses Statically
Recipe 21.4. Translating Some Addresses Statically and Others Dynamically
Recipe 21.5. Translating in Both Directions Simultaneously
Recipe 21.6. Rewriting the Network Prefix
Recipe 21.7. Adjusting NAT Timers
Recipe 21.8. Changing TCP Ports for FTP
Recipe 21.9. Checking NAT Status
Recipe 21.10. Debugging NAT
Chapter 22. Hot Standby Router Protocol
Introduction
Recipe 22.1. Configuring Basic HSRP Functionality
Recipe 22.2. Using HSRP Preempt
Recipe 22.3. Making HSRP React to Problems on Other Interfaces
Recipe 22.4. Load Balancing with HSRP
Recipe 22.5. Redirecting ICMP with HSRP
Recipe 22.6. Manipulating HSRP Timers
Recipe 22.7. Using HSRP on a Token Ring Network
Recipe 22.8. HSRP SNMP Support
Recipe 22.9. Increasing HSRP Security
Recipe 22.10. Showing HSRP State Information
Recipe 22.11. Debugging HSRP
Chapter 23. IP Multicast
Introduction
Recipe 23.1. Configuring Basic Multicast Functionality with PIM-DM
Recipe 23.2. Routing Multicast Traffic with PIMSM and BSR
Recipe 23.3. Routing Multicast Traffic with PIM-SM and Auto-RP
Recipe 23.4. Configuring Routing for a Low Frequency Multicast Application
Recipe 23.5. Configuring CGMP
Recipe 23.6. Static Multicast Routes and Group Memberships
Recipe 23.7. Routing Multicast Traffic with MOSPF
Recipe 23.8. Routing Multicast Traffic with DVMRP
Recipe 23.9. DVMRP Tunnels
Recipe 23.10. Controlling Multicast Scope with TTL
Recipe 23.11. Using Administratively Scoped Addressing
Recipe 23.12. Exchanging Multicast Routing Information with MBGP
Recipe 23.13. Using MSDP to Discover External Sources
Recipe 23.14. Converting Broadcasts to Multicasts
Recipe 23.15. Showing Multicast Status
Recipe 23.16. Debugging Multicast Routing
Appendix A. External Software Packages
Section A.1. Perl
Section A.2. Expect
Section A.3. NET-SNMP
Section A.4. PuTTY
Section A.5. OpenSSH
Section A.6. Ethereal
Appendix B. IP Precedence, TOS, and DSCP Classifications
Section B.1. Combining TOS and IP Precedence to Mimic DSCP
Section B.2. RSVP
Section B.3. Queueing Algorithms
Section B.4. Dropping Packets and Congestion Avoidance
Colophon
Index

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