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Spis treści

Cisco IOS in a Nutshell. 2nd Edition eBook -- spis treści

• Cisco IOS in a Nutshell, 2nd Edition
• Preface
  • Organization
  • Whats New in This Edition
  • Conventions
  • Safari Enabled
  • Wed Like to Hear from You
  • Acknowledgments
• 1. Getting Started
  • 1.1. IOS User Modes
  • 1.2. Command-Line Completion
  • 1.3. Get to Know the Question Mark
  • 1.4. Command-Line Editing Keys
  • 1.5. Pausing Output
  • 1.6. show Commands
• 2. IOS Images and Configuration Files
  • 2.1. IOS Image Filenames
    • 2.1.1. Platform Identifier
    • 2.1.2. Feature Set
    • 2.1.3. Image Execution Location
  • 2.2. The New Cisco IOS Packaging Model
    • 2.2.1. Example of New Image Name
    • 2.2.2. Status of the Release
    • 2.2.3. Finding the Release on Ciscos Web Site
  • 2.3. Loading Image Files Through the Network
    • 2.3.1. Using TFTP to Download Files
    • 2.3.2. Using RCP to Download Files
    • 2.3.3. Using SCP to Download Files
  • 2.4. Using the IOS Filesystem for Images
    • 2.4.1. Upgrading Flash Memory Using the Filesystem Commands
  • 2.5. The Routers Configuration
  • 2.6. Loading Configuration Files
    • 2.6.1. Loading the running-config
    • 2.6.2. Loading the startup-config
    • 2.6.3. Saving running-config to startup-config
    • 2.6.4. Viewing a Configuration
      • 2.6.4.1. Options for the show config command
      • 2.6.4.2. Stopping the More prompt
    • 2.6.5. Erasing a Stored Configuration
    • 2.6.6. Saving a Configuration to a Network Server
• 3. Basic Router Configuration
  • 3.1. Setting the Router Name
  • 3.2. Setting the System Prompt
  • 3.3. Configuration Comments
  • 3.4. The Enable Password
  • 3.5. Mapping Hostnames to IP Addresses
    • 3.5.1. IP Host Tables
    • 3.5.2. Enabling DNS
  • 3.6. Setting the Routers Time
    • 3.6.1. The Calendar Versus the Clock
    • 3.6.2. Configuring NTP
  • 3.7. Enabling SNMP
  • 3.8. Cisco Discovery Protocol
  • 3.9. System Banners
    • 3.9.1. Creating Banners
    • 3.9.2. Disabling Banners
• 4. Line Commands
  • 4.1. The line Command
    • 4.1.1. Absolute and Relative Line Numbering
  • 4.2. The Console Port
  • 4.3. Virtual Terminals (VTYs)
  • 4.4. Asynchronous Ports (TTYs)
  • 4.5. The Auxiliary (AUX) Port
  • 4.6. show line
  • 4.7. Reverse Telnet
  • 4.8. Common Configuration Items
    • 4.8.1. Communication Parameters
    • 4.8.2. Transport Type
    • 4.8.3. Session Limits and Timeouts
    • 4.8.4. Special Characters and Key Sequences
• 5. Interface Commands
  • 5.1. Naming and Numbering Interfaces
    • 5.1.1. Subinterfaces
  • 5.2. Basic Interface Configuration Commands
    • 5.2.1. shutdown
    • 5.2.2. Interface Descriptions
    • 5.2.3. Setting the IP Address and Subnet Mask
      • 5.2.3.1. Secondary IP address(es)
    • 5.2.4. Other Common Interface Commands
  • 5.3. The Loopback Interface
  • 5.4. The Null Interface
  • 5.5. Ethernet, Fast Ethernet, and Gigabit Ethernet Interfaces
  • 5.6. Token Ring Interfaces
  • 5.7. ISDN Interfaces
    • 5.7.1. A Simple ISDN Configuration
  • 5.8. Serial Interfaces
    • 5.8.1. Serial Encapsulation
    • 5.8.2. Serial T1 Connection
    • 5.8.3. T1 Configuration on a 2524 with a CSU/DSU Card
    • 5.8.4. Channelized T1
  • 5.9. Asynchronous Interfaces
    • 5.9.1. Using the group-async Command
    • 5.9.2. Specifying an IP Address Pool
    • 5.9.3. Using BOOTP Configuration Items for Dial-in Connections
    • 5.9.4. Using DHCP for IP Addresses and Dial-in Configuration Items
  • 5.10. Interface show Commands
    • 5.10.1. Clearing the show Command Counters
    • 5.10.2. Listing All Interfaces
    • 5.10.3. Using the show interface Commands
      • 5.10.3.1. show interface accounting
      • 5.10.3.2. show ip interface
• 6. Networking Technologies
  • 6.1. Frame Relay
    • 6.1.1. Important Frame Relay Terminology
    • 6.1.2. Frame Relay Configuration
    • 6.1.3. Mapping IP Addresses to DLCIs
      • 6.1.3.1. Explicitly mapping DLCIs
      • 6.1.3.2. Configuring a multipoint connection
    • 6.1.4. Frame Relay Traffic Shaping
      • 6.1.4.1. Enabling traffic-shaping on a frame relay link
      • 6.1.4.2. Adaptive shaping
    • 6.1.5. Frame Relay show Commands
  • 6.2. ATM
    • 6.2.1. ATM Terminology
    • 6.2.2. Configuring Permanent Virtual Circuits
      • 6.2.2.1. Configuring an ATM interface with static IP mapping
      • 6.2.2.2. Configuring an ATM interface with dynamic IP mapping
    • 6.2.3. Configuring Switched Virtual Circuits
      • 6.2.3.1. ATM ARP server
    • 6.2.4. Configuring with DXI
    • 6.2.5. ATM show Commands
    • 6.2.6. LAN Emulation (LANE)
      • 6.2.6.1. LANE configuration notes
      • 6.2.6.2. Configuring the LECS
      • 6.2.6.3. Configuring the LES/BUS
      • 6.2.6.4. Configuring the LEC
      • 6.2.6.5. LANE show commands
  • 6.3. DSL
    • 6.3.1. Configuring Our DSL Client Router
    • 6.3.2. Troubleshooting a DSL Connection
  • 6.4. Cable
  • 6.5. VoIP
    • 6.5.1. VoIP Protocols
      • 6.5.1.1. H.323
      • 6.5.1.2. MGCP
      • 6.5.1.3. SIP
    • 6.5.2. VoIP Terminology
    • 6.5.3. Examples
      • 6.5.3.1. FXO Gateway to PSTN
      • 6.5.3.2. H.323 call routing
      • 6.5.3.3. MGCP call routing
      • 6.5.3.4. SIP Configuration for VoIP
• 7. Access Lists
  • 7.1. How Packets Match a List Entry
    • 7.1.1. Address/Mask Pairs (Wildcards)
    • 7.1.2. Computing a Wildcard for a Given Subnet Mask
    • 7.1.3. Access List Processing
    • 7.1.4. Implicit Deny
    • 7.1.5. Access Lists Are Additive
    • 7.1.6. Outbound Access Lists Are More Efficient Than Inbound
  • 7.2. Types of Access Lists
    • 7.2.1. Extended Access Lists
      • 7.2.1.1. Specifying ports
      • 7.2.1.2. Established connections
      • 7.2.1.3. ICMP protocol entries
      • 7.2.1.4. Applying an access list to an interface or line
    • 7.2.2. Named Access Lists
      • 7.2.2.1. Entering noncontiguous ports
    • 7.2.3. Reflexive Access Lists
      • 7.2.3.1. Creating the outbound reflexive list
      • 7.2.3.2. Creating the inbound reflexive list
      • 7.2.3.3. Applying the inbound and outbound reflexive lists to an interface
      • 7.2.3.4. Setting the reflexive timeout
      • 7.2.3.5. Reflexive list notes
  • 7.3. Specific Topics
    • 7.3.1. Adding Comments to an Access List
    • 7.3.2. Timed Access Lists
    • 7.3.3. Building a Gateway Router
      • 7.3.3.1. IP address spoofing
      • 7.3.3.2. Permitting FTP through an access list
      • 7.3.3.3. Passive FTP
      • 7.3.3.4. The actual access list
    • 7.3.4. Optimizing Your Access Lists
    • 7.3.5. Emulating a Packet Sniffer
    • 7.3.6. Logging Access List Violations
    • 7.3.7. Securely Updating Access Lists
    • 7.3.8. Getting the List to a Router with TFTP, RCP, or SCP
• 8. IP Routing Topics
  • 8.1. Autonomous System (AS) Numbers
  • 8.2. Interior and Exterior Gateway Protocols
  • 8.3. Distance-Vector and Link-State Routing Protocols
    • 8.3.1. Distance-Vector Protocols
    • 8.3.2. Link-State Routing Protocols
    • 8.3.3. Administrative Distance
    • 8.3.4. Variable-Length Subnet Masks (VLSM) and Classless Routing
    • 8.3.5. Protocol Comparison
  • 8.4. Static Routes
    • 8.4.1. Default Static Routes
    • 8.4.2. A Static Route to the Null Interface
    • 8.4.3. Backup Static Routes
  • 8.5. Split Horizon
  • 8.6. Passive Interfaces
    • 8.6.1. Route Redistribution
    • 8.6.2. Filtering Routes
      • 8.6.2.1. Filtering incoming routes
      • 8.6.2.2. Filtering outgoing routes
      • 8.6.2.3. Filtering updates during redistribution
      • 8.6.2.4. Revisiting the example
    • 8.6.3. Route Maps
      • 8.6.3.1. Enforcing routing policy with route maps
      • 8.6.3.2. Enforcing routing policy with the ip policy command
  • 8.7. Fast Switching and Process Switching
    • 8.7.1. Fast Switching
    • 8.7.2. Process Switching
    • 8.7.3. Useful show Commands
      • 8.7.3.1. show ip route summary
      • 8.7.3.2. clear ip route
      • 8.7.3.3. show ip protocols
• 9. Interior Routing Protocols
  • 9.1. RIP
    • 9.1.1. Basic RIP Configuration
    • 9.1.2. Enabling RIPv2 on the Network
    • 9.1.3. Redistributing Other Routing Protocols into RIP
    • 9.1.4. RIPv2 Authentication
  • 9.2. IGRP
    • 9.2.1. Basic IGRP Configuration
      • 9.2.1.1. IGRPs metric
      • 9.2.1.2. Packet size
      • 9.2.1.3. Modifying the range of the network
      • 9.2.1.4. IGRPs load balancing
    • 9.2.2. Redistributing Other Protocols into IGRP
  • 9.3. EIGRP
    • 9.3.1. Enabling EIGRP on the Network
    • 9.3.2. EIGRP and Route Summarization
      • 9.3.2.1. Enabling route summarization on a specific interface
    • 9.3.3. EIGRP Authentication
    • 9.3.4. EIGRP Metrics
    • 9.3.5. Tuning EIGRP
    • 9.3.6. EIGRP show Commands
      • 9.3.6.1. show ip eigrp neighbors
      • 9.3.6.2. show ip eigrp topology
      • 9.3.6.3. show ip eigrp traffic
    • 9.3.7. EIGRP Redistribution
      • 9.3.7.1. RIP
      • 9.3.7.2. IGRP
    • 9.3.8. Converting an IGRP Network to EIGRP
  • 9.4. OSPF
    • 9.4.1. OSPF Concepts
      • 9.4.1.1. Areas
      • 9.4.1.2. Router types
      • 9.4.1.3. Link-state advertisements (LSAs)
      • 9.4.1.4. Area types
      • 9.4.1.5. Router ID
      • 9.4.1.6. Designated router (DR)
    • 9.4.2. Enabling OSPF on the Network
    • 9.4.3. Sample OSPF Configurations
    • 9.4.4. Route Summarization in OSPF
      • 9.4.4.1. Inter-area summarization
      • 9.4.4.2. External summarization
    • 9.4.5. Virtual Backbone Links
    • 9.4.6. Interoperability with Other Vendors
    • 9.4.7. Default Routes in OSPF
    • 9.4.8. NSSAs (Not-So-Stubby Areas)
    • 9.4.9. OSPF Configuration Example
      • 9.4.9.1. Putting route summarization to use
    • 9.4.10. Redistributing Other Protocols into OSPF
    • 9.4.11. OSPF show Commands
      • 9.4.11.1. show ip ospf border routers
      • 9.4.11.2. show ip ospf neighbor
      • 9.4.11.3. show ip ospf database
      • 9.4.11.4. show ip ospf interface
  • 9.5. IS-IS
    • 9.5.1. IS-IS Concepts
      • 9.5.1.1. Level 1 and level 2
      • 9.5.1.2. NSAP addressing
      • 9.5.1.3. Enabling an interface for IS-IS
    • 9.5.2. IS-IS configuration example
    • 9.5.3. Show Commands
    • 9.5.4. Authentication
    • 9.5.5. Metric Tuning
    • 9.5.6. Injecting a Default Route
    • 9.5.7. IS-IS Route Leaking
• 10. Border Gateway Protocol
  • 10.1. Introduction to BGP
    • 10.1.1. How BGP Selects Routes
    • 10.1.2. Basic Configuration Commands
      • 10.1.2.1. The router and network commands
      • 10.1.2.2. The neighbor command
      • 10.1.2.3. Local-AS numbers
      • 10.1.2.4. Synchronization
      • 10.1.2.5. Automatic summary
      • 10.1.2.6. default-originate
      • 10.1.2.7. next-hop-self
      • 10.1.2.8. BGP route dampening
      • 10.1.2.9. iBGP checklist
  • 10.2. A Simple BGP Configuration
  • 10.3. Route Filtering
    • 10.3.1. AS Path Filters
    • 10.3.2. Community Filters
    • 10.3.3. Aggregate Filters
  • 10.4. An Advanced BGP Configuration
    • 10.4.1. Adding a Preference
  • 10.5. Neighbor Authentication
  • 10.6. Peer Groups
  • 10.7. Route Reflectors
  • 10.8. BGP Confederacies
  • 10.9. BGP TTL Security
• 11. Quality of Service
  • 11.1. Marking
    • 11.1.1. Different Types of ToS
      • 11.1.1.1. IPv4 ToS Byte
      • 11.1.1.2. Differentiated Services Codepoint (DSCP)
      • 11.1.1.3. Assured Forwarding
      • 11.1.1.4. Expedited Forwarding
      • 11.1.1.5. DSCP example
  • 11.2. Older Queuing Methods
    • 11.2.1. FIFO
    • 11.2.2. Priority Queuing
      • 11.2.2.1. Monitoring priority queueing
    • 11.2.3. Custom Queuing
      • 11.2.3.1. Setting the queue size
      • 11.2.3.2. Applying a queue to an interface
      • 11.2.3.3. Assigning packets to queues by protocol type
    • 11.2.4. Weighted Fair Queuing (WFQ)
      • 11.2.4.1. Monitoring WFQ
  • 11.3. Modern IOS QoS Tools
    • 11.3.1. Network-Based Application Recognition (NBAR)
      • 11.3.1.1. NBAR in action
      • 11.3.1.2. NBAR protocol discovery
    • 11.3.2. Modular QoS CLI (MQC)
      • 11.3.2.1. Step One: Defining the class maps
      • 11.3.2.2. Step Two: Defining the QoS policy
      • 11.3.2.3. Step 3: Defining where to apply the service policy
    • 11.3.3. Implementing Class-Based Weighted Fair Queuing with MQC
    • 11.3.4. Low-Latency Queuing (LLQ)
  • 11.4. Congestion Avoidance
    • 11.4.1. Weighted Random Early Detection (WRED)
      • 11.4.1.1. Configuring WRED on an interface
      • 11.4.1.2. Using WRED instead of Tail-drop in CBWFQ
  • 11.5. Traffic Policing
    • 11.5.1. MQC Policing
    • 11.5.2. Committed Access Rate (CAR)
      • 11.5.2.1. Rate-limit example
  • 11.6. Traffic Shaping
    • 11.6.1. Traffic Shaping Example
    • 11.6.2. Frame-Relay Shaping
  • 11.7. AutoQoS
    • 11.7.1. What Does AutoQoS Enable?
    • 11.7.2. AutoQoS Command Usage
      • 11.7.2.1. Command syntax
      • 11.7.2.2. AutoQoS discovery
      • 11.7.2.3. AutoQoS show command
  • 11.8. QoS Device Manager
• 12. Dial-on-Demand Routing
  • 12.1. Configuring a Simple DDR Connection
  • 12.2. Sample Legacy DDR Configurations
    • 12.2.1. DDR Backup Links
      • 12.2.1.1. Backup interface commands
      • 12.2.1.2. DDR bandwidth on demand with backup interface commands
      • 12.2.1.3. DDR backup with floating static routes
    • 12.2.2. Dialer Maps
      • 12.2.2.1. The most basic form of this command
      • 12.2.2.2. A more complicated use of dialer maps
  • 12.3. Dialer Interfaces (Dialer Profiles)
    • 12.3.1. Rotary Groups
    • 12.3.2. Dialer Pools
  • 12.4. Multilink PPP
  • 12.5. Snapshot DDR
    • 12.5.1. Useful show Commands
      • 12.5.1.1. show dialer
      • 12.5.1.2. show dialer map
      • 12.5.1.3. show isdn active
      • 12.5.1.4. show snapshot
• 13. Specialized Networking Topics
  • 13.1. Bridging
    • 13.1.1. Concurrent Routing and Bridging (CRB)
    • 13.1.2. Integrated Routing and Bridging (IRB)
    • 13.1.3. Bridging show Commands
      • 13.1.3.1. show bridge
      • 13.1.3.2. show bridge group
    • 13.1.4. DLSw+
  • 13.2. Hot Standby Routing Protocol (HSRP)
    • 13.2.1. Tracking Another Interface
    • 13.2.2. Naming Our HSRP Configuration
    • 13.2.3. Multiple-Group Hot Standby Routing
    • 13.2.4. Load Sharing with Hot Standby
    • 13.2.5. HSRP show Commands
  • 13.3. Network Address Translation (NAT)
    • 13.3.1. Overloading NAT Address Space
      • 13.3.1.1. Mapping incoming ports to different NAT addresses
    • 13.3.2. NAT show Commands
    • 13.3.3. Stateful NAT (SNAT)
      • 13.3.3.1. Configuring SNAT with HSRP
      • 13.3.3.2. Configuring SNAT without HSRP
  • 13.4. Tunnels
    • 13.4.1. show Commands for Tunnels
  • 13.5. Encrypted Tunnels
    • 13.5.1. Tunnel Encryption with DSS and DES
      • 13.5.1.1. Generating keys
      • 13.5.1.2. Configuring encryption on the tunnel
    • 13.5.2. DES Tunnel show Commands
      • 13.5.2.1. show crypto engine connections active
      • 13.5.2.2. show crypto engine configuration
    • 13.5.3. IPSec Tunneling
    • 13.5.4. Dynamic Multipoint VPN
      • 13.5.4.1. Configuring DMVPN
        • 13.5.4.1.1. Configuring an IPSec profile
        • 13.5.4.1.2. Configuring the hub for DMVPN
        • 13.5.4.1.3. Configuring a spoke router for DMVPN
        • 13.5.4.1.4. Verifying DMVPN configuration
  • 13.6. Multicast Routing
    • 13.6.1. IGMP
    • 13.6.2. Reverse Path Forwarding
    • 13.6.3. Dense Mode
      • 13.6.3.1. Configuring multicast for dense mode
    • 13.6.4. Sparse Mode
      • 13.6.4.1. Configuring multicast for sparse mode
      • 13.6.4.2. Auto-RP configuration and sparse-dense mode
      • 13.6.4.3. BSR
    • 13.6.5. Cisco Group Management Protocol (CGMP)
  • 13.7. Multiprotocol Label Switching (MPLS)
    • 13.7.1. MPLS Terminology
    • 13.7.2. How Does It Work?
    • 13.7.3. Configuring MPLS
      • 13.7.3.1. Incrementally deploying MPLS
      • 13.7.3.2. Verifying the MPLS configuration
    • 13.7.4. MPLS VPN
• 14. Switches and VLANs
  • 14.1. Switch Terminology
    • 14.1.1. Layer-2 and Layer-3 Switching
    • 14.1.2. Learning MAC Addresses
    • 14.1.3. VLAN
    • 14.1.4. Broadcast Domain
    • 14.1.5. Collision Domain
    • 14.1.6. Spanning Tree Protocol
      • 14.1.6.1. Spanning Tree Port States
      • 14.1.6.2. Bridge Protocol Data Units
      • 14.1.6.3. STP selects the root bridge
      • 14.1.6.4. Selecting a root port and a designated port
      • 14.1.6.5. Convergence in STP
      • 14.1.6.6. Speeding up STP convergence
      • 14.1.6.7. show spanning-tree
  • 14.2. IOS on Switches
  • 14.3. Basic Switch Configuration
    • 14.3.1. Configuring the Management Port (VLAN 1)
    • 14.3.2. Simple Switch Configuration
    • 14.3.3. Auto Detection
    • 14.3.4. Sample VLAN Configuration
    • 14.3.5. VLAN Interface Commands
  • 14.4. Trunking
    • 14.4.1. Restricting VLANs on a Trunk
    • 14.4.2. Finishing Our Previous Network
    • 14.4.3. Added Port Security
    • 14.4.4. VLAN Trunking Protocol
    • 14.4.5. VTP Modes
    • 14.4.6. VLAN Database
    • 14.4.7. Configuring VTP
      • 14.4.7.1. Setting the VTP mode
      • 14.4.7.2. Setting the VTP domain
      • 14.4.7.3. Setting the VTP password
      • 14.4.7.4. Creating a VLAN
      • 14.4.7.5. Configuration example
    • 14.4.8. Backing Up the VLAN Database
  • 14.5. Switch Monitor Port for IDS or Sniffers
  • 14.6. Troubleshooting Switches
• 15. Router Security
  • 15.1. Securing Enable Mode Access
    • 15.1.1. Setting the Enable Password
    • 15.1.2. The More Secure enable secret Command
    • 15.1.3. Privilege Levels for enable access
  • 15.2. Routine Security Measures
    • 15.2.1. Features to Disable
    • 15.2.2. Features to Enable
      • 15.2.2.1. Deny local IP addresses coming from outside
      • 15.2.2.2. Use a warning banner
    • 15.2.3. AutoSecure: Letting the Router Do the Work
  • 15.3. Restricting Access to Your Router
    • 15.3.1. Virtual Terminal Access
      • 15.3.1.1. Protecting VTY with an access list
      • 15.3.1.2. Allowing SSH connections to the router
      • 15.3.1.3. Enabling SSH
    • 15.3.2. Users and Authentication
      • 15.3.2.1. Adding users with the user command
      • 15.3.2.2. Using the AAA framework
      • 15.3.2.3. User management with AAA
      • 15.3.2.4. Restricting dial-in user access with AAA
• 16. Troubleshooting and Logging
  • 16.1. ping
    • 16.1.1. Ping the Broadcast Address
    • 16.1.2. Extended ping
      • 16.1.2.1. What can we test with the source address?
  • 16.2. trace
  • 16.3. Debugging
    • 16.3.1. Using Debugging in Practice
      • 16.3.1.1. The debug list command
  • 16.4. Logging
    • 16.4.1. Configuring Logging
    • 16.4.2. Severity Levels
    • 16.4.3. Buffering Logging and Debug Output
    • 16.4.4. XML Output of Logging Messages
• 17. Quick Reference
  • aaa accounting
  • aaa accounting delay-start
  • aaa accounting gigawords
  • aaa accounting nested
  • aaa accounting resource
  • aaa accounting send stop-record authentication failure
  • aaa accounting session-duration ntp-adjusted
  • aaa accounting suppress null-username
  • aaa accounting update
  • aaa authentication attempts login
  • aaa authentication banner
  • aaa authentication enable default
  • aaa authentication fail-message
  • aaa authentication local-override
  • aaa authentication login
  • aaa authentication password-prompt
  • aaa authentication ppp
  • aaa authentication username-prompt
  • aaa authorization
  • aaa authorization config-commands
  • aaa authorization reverse-access
  • aaa authorization template
  • aaa configuration route
  • aaa group server radius
  • aaa group server tacacs+
  • aaa new-model
  • absolute-timeout
  • access-class
  • access-enable
  • access-list
  • access-list rate-limit
  • access-template
  • activation-character
  • aggregate-address
  • alias
  • area authentication
  • area default-cost
  • area nssa
  • area-password
  • area range
  • area stub
  • area virtual-link
  • arp (global)
  • arp (interface)
  • arp timeout
  • async-bootp
  • async default ip address
  • async default routing
  • async dynamic address
  • async dynamic routing
  • async mode
  • atm address
  • atm arp-server
  • atm esi-address
  • atm lecs-address
  • atm lecs-address-default
  • atm nsap-address
  • atm pvc
  • atm-vc
  • autobaud
  • autocommand
  • autodetect encapsulation
  • autohangup
  • auto discovery qos
  • auto qos voip
  • auto secure
  • autoselect
  • auto-summary
  • backup
  • bandwidth (interface)
  • bandwidth (policy-map)
  • banner exec
  • banner incoming
  • banner login
  • banner motd
  • bgp always-compare-med
  • bgp bestpath as-path ignore
  • bgp bestpath med-confed
  • bgp bestpath missing-as-worst
  • bgp client-to-client reflection
  • bgp cluster-id
  • bgp confederation identifier
  • bgp confederation peers
  • bgp dampening
  • bgp default local-preference
  • bgp default route-target filter
  • bgp deterministic med
  • bgp fast-external-fallover
  • bgp log-neighbor-changes
  • bgp-policy
  • bridge acquire
  • bridge address
  • bridge cmf
  • bridge crb
  • bridge forward-time
  • bridge-group
  • bridge-group aging-time
  • bridge-group circuit-group
  • bridge-group input-address-list
  • bridge-group input-lsap-list
  • bridge-group input-pattern
  • bridge-group input-type-list
  • bridge-group output-address-list
  • bridge-group output-lsap-list
  • bridge-group output-pattern
  • bridge-group output-type-list
  • bridge-group path-cost
  • bridge-group priority
  • bridge-group spanning-disabled
  • bridge hello-time
  • bridge irb
  • bridge max-age
  • bridge multicast-source
  • bridge priority
  • bridge protocol
  • bridge route
  • busy-message
  • cable helper-address
  • calendar set
  • callback forced-wait
  • cd
  • cdp advertise-v2
  • cdp enable
  • cdp holdtime
  • cdp run
  • cdp timer
  • channel-group (controller)
  • channel-group (interface)
  • chat-script
  • class (frame-relay)
  • class (MPLS)
  • class (policy-map)
  • class-map
  • clear
  • client-atm-address name
  • clock calendar-valid
  • clock rate
  • clock read-calendar
  • clock set
  • clock summer-time
  • clock timezone
  • clock update-calendar
  • compress
  • config-register
  • configure
  • controller
  • copy
  • crc
  • custom-queue-list
  • databits
  • data-character-bits
  • dce-terminal-timing enable
  • debug
  • default-information
  • default-information originate
  • default-metric
  • default-name
  • delay
  • delete
  • description
  • dialer aaa
  • dialer callback-secure
  • dialer callback-server
  • dialer caller
  • dialer dtr
  • dialer enable-timeout
  • dialer fast-idle
  • dialer-group
  • dialer hold-queue
  • dialer idle-timeout
  • dialer in-band
  • dialer isdn
  • dialer-list
  • dialer load-threshold
  • dialer map
  • dialer map snapshot
  • dialer max-link
  • dialer pool
  • dialer pool-member
  • dialer priority
  • dialer remote-name
  • dialer rotary-group
  • dialer rotor
  • dialer string
  • dialer wait-for-carrier-time
  • dialer watch-disable
  • dialer watch-group
  • dialer watch-list
  • dir
  • disable
  • disconnect
  • disconnect-character
  • disconnect ssh
  • dispatch-character
  • distance
  • distance bgp
  • distance eigrp
  • distribute-list in
  • distribute-list out
  • domain-password
  • downward-compatible-config
  • down-when-looped
  • drop
  • dte-invert-txc
  • early-token-release
  • editing
  • eigrp log-neighbor-changes
  • enable
  • enable last-resort
  • enable password
  • enable secret
  • enable use-tacacs
  • encapsulation (ATM/MPLS)
  • encapsulation (interface)
  • end
  • erase
  • escape-character
  • exception core-file
  • exception dump
  • exception memory
  • exception protocol
  • exception spurious-interrupt
  • exec
  • exec-timeout
  • exit
  • fair-queue (policy-map class)
  • fair-queue (interface)
  • fair-queue aggregate-limit
  • fair-queue individual-limit
  • fair-queue limit
  • fair-queue qos-group
  • fair-queue tos
  • fair-queue weight
  • fddi burst-count
  • fddi c-min
  • fddi cmt-signal-bits
  • fddi duplicate-address-check
  • fddi encapsulate
  • fddi frames-per-token
  • fddi smt-frames
  • fddi tb-min
  • fddi tl-min-time
  • fddi token-rotation-time
  • fddi t-out
  • fddi valid-transmission-time
  • flowcontrol
  • format
  • frame-relay adaptive-shaping
  • frame-relay [ bc | be]
  • frame-relay becn-response-enable
  • frame-relay broadcast-queue
  • frame-relay cir
  • frame-relay class
  • frame-relay custom-queue-list
  • frame-relay de-group
  • frame-relay de-list
  • frame-relay idle-timer
  • frame-relay interface-dlci
  • frame-relay intf-type
  • frame-relay inverse-arp
  • frame-relay ip rtp header-compression
  • frame-relay ip tcp header-compression
  • frame-relay lmi-type
  • frame-relay local-dlci
  • frame-relay map
  • frame-relay map bridge
  • frame-relay map clns
  • frame-relay map ip compress
  • frame-relay map ip rtp header-compression
  • frame-relay map ip tcp header-compression
  • frame-relay mincir
  • frame-relay multicast-dlci
  • frame-relay payload-compress packet-by-packet
  • frame-relay priority-dlci-group
  • frame-relay priority-group
  • frame-relay route
  • frame-relay svc
  • frame-relay switching
  • frame-relay traffic-rate
  • frame-relay traffic-shaping
  • fsck
  • ftp-server enable
  • ftp-server topdir
  • full-duplex
  • full-help
  • group-range
  • half-duplex
  • half-duplex controlled-carrier
  • help
  • history
  • hold-character
  • hold-queue
  • hostname
  • hssi external-loop-request
  • hssi internal-clock
  • hub
  • ignore-dcd
  • interface
  • interface bvi
  • interface dialer
  • interface group-async
  • ip access-group
  • ip access-list
  • ip accounting
  • ip accounting-list
  • ip accounting-threshold
  • ip accounting-transits
  • ip address
  • ip address negotiated
  • ip address-pool
  • ip alias
  • ip as-path access-list
  • ip authentication
  • ip bandwidth-percent eigrp
  • ip bgp-community new-format
  • ip bootp server
  • ip broadcast-address
  • ip cef
  • ip cef traffic-statistics
  • ip cgmp
  • ip classless
  • ip community-list
  • ip default-gateway
  • ip default-network
  • ip dhcp-server
  • ip directed-broadcast
  • ip domain-list
  • ip domain-lookup
  • ip domain-name
  • ip dvmrp accept-filter
  • ip dvmrp auto-summary
  • ip dvmrp default-information
  • ip dvmrp metric
  • ip dvmrp metric-offset
  • ip dvmrp output-report-delay
  • ip dvmrp reject-non-pruners
  • ip dvmrp routehog-notification
  • ip dvmrp route-limit
  • ip dvmrp summary-address
  • ip dvmrp unicast-routing
  • ip forward-protocol
  • ip ftp passive
  • ip ftp password
  • ip ftp source-interface
  • ip ftp username
  • ip hello-interval eigrp
  • ip helper-address
  • ip hold-time eigrp
  • ip host
  • ip http
  • ip identd
  • ip igmp access-group
  • ip igmp explicit-tracking
  • ip igmp helper-address
  • ip igmp join-group
  • ip igmp query-interval
  • ip igmp query-max-response-time
  • ip igmp query-timeout
  • ip igmp static-group
  • ip igmp version
  • ip irdp
  • ip load-sharing
  • ip local policy route-map
  • ip local pool
  • ip mask-reply
  • ip mroute
  • ip mroute-cache
  • ip mtu
  • ip multicast boundary
  • ip multicast cache-headers
  • ip multicast helper-map
  • ip multicast rate-limit
  • ip multicast-routing
  • ip multicast ttl-threshold
  • ip name-server
  • ip nat
  • ip nat inside destination
  • ip nat inside source
  • ip nat outside source
  • ip nat pool
  • ip nat stateful id
  • ip nat translation
  • ip nbar pdlm
  • ip nbar port-map
  • ip nbar protocol-discovery
  • ip netmask-format
  • ip nhrp authentication
  • ip nhrp holdtime
  • ip nhrp interest
  • ip nhrp map
  • ip nhrp map multicast
  • ip nhrp max-send
  • ip nhrp network-id
  • ip nhrp nhs
  • ip nhrp record
  • ip nhrp responder
  • ip nhrp server-only
  • ip nhrp trigger-svc
  • ip nhrp use
  • ip ospf authentication
  • ip ospf authentication-key
  • ip ospf cost
  • ip ospf dead-interval
  • ip ospf demand-circuit
  • ip ospf hello-interval
  • ip ospf message-digest-key
  • ip ospf name-lookup
  • ip ospf network
  • ip ospf priority
  • ip ospf retransmit-interval
  • ip ospf transmit-delay
  • ip pim
  • ip pim accept-rp
  • ip pim message-interval
  • ip pim minimum-vc-rate
  • ip pim multipoint-signalling
  • ip pim nbma-mode
  • ip pim neighbor-filter
  • ip pim query-interval
  • ip pim rp-address
  • ip pim rp-announce-filter
  • ip pim send-rp-announce
  • ip pim send-rp-discovery
  • ip pim vc-count
  • ip pim version
  • ip policy-list
  • ip policy route-map
  • ip proxy-arp
  • ip radius source-interface
  • ip rarp-server
  • ip rcmd rcp-enable
  • ip rcmd remote-host
  • ip rcmd remote-username
  • ip rcmd rsh-enable
  • ip redirects
  • ip rip authentication
  • ip rip receive version
  • ip rip send version
  • ip rip triggered
  • ip rip v2-broadcast
  • ip route
  • ip route-cache
  • ip route-cache policy
  • ip route priority high
  • ip route profile
  • ip router isis
  • ip routing
  • ip rtp compression-connections
  • ip rtp header-compression
  • ip rtp priority
  • ip scp server enable
  • ip source-route
  • ip split-horizon
  • ip ssh
  • ip subnet-zero
  • ip summary-address eigrp
  • ip summary-address rip
  • ip tcp chunk-size
  • ip tcp compression-connections
  • ip tcp header-compression
  • ip tcp mtu-path-discovery
  • ip tcp queuemax
  • ip tcp synwait-time
  • ip tcp window-size
  • ip telnet source-interface
  • ip tftp source-interface
  • ip unnumbered
  • ip unreachables
  • isdn answer1, isdn answer2
  • isdn autodetect
  • isdn bchan-number-order
  • isdn busy
  • isdn caller
  • isdn call interface
  • isdn calling-number
  • isdn conference-code
  • isdn disconnect interface
  • isdn fast-rollover-delay
  • isdn incoming-voice
  • isdn leased-line bri 128
  • isdn not-end-to-end
  • isdn nsf-service
  • isdn outgoing-voice
  • isdn overlap-receiving
  • isdn send-alerting
  • isdn sending-complete
  • isdn service
  • isdn spid1 (spid2)
  • isdn switch-type
  • isdn tei
  • isdn tei-negotiation
  • isdn transfer-code
  • isdn twait-disable
  • isdn voice-priority
  • isis advertise-prefix
  • isis authentication key-chain
  • isis authentication mode
  • isis authentication send-only
  • isis circuit-type
  • isis csnp-interval
  • isis hello-interval
  • isis hello-multiplier
  • isis lsp-interval
  • isis metric
  • isis password
  • isis priority
  • isis retransmit-interval
  • isis retransmit-throttle-interval
  • is-type
  • keepalive
  • key
  • key chain
  • key config-key
  • key-string
  • lane auto-config-atm-address
  • lane bus-atm-address
  • lane client
  • lane client-atm-address
  • lane config-atm-address
  • lane config database
  • lane database
  • lane fixed-config-atm-address
  • lane global-lecs-address
  • lane le-arp
  • lane server-atm-address
  • lane server-bus
  • line
  • linecode
  • link-test
  • location
  • logging
  • logging buffered
  • logging buffered xml
  • logging console
  • logging console xml
  • logging count
  • logging facility
  • logging history
  • logging history size
  • logging host
  • logging monitor
  • logging on
  • logging source-interface
  • logging synchronous
  • logging trap
  • login
  • login authentication
  • logout-warning
  • loopback
  • mac-address-table aging-time
  • mac-address-table dynamic
  • mac-address-table secure
  • mac-address-table static
  • map-class dialer
  • map-class frame-relay
  • map-group
  • map-list
  • match access-group
  • match any
  • match as-path
  • match class-map
  • match community-list
  • match cos
  • match destination-address mac
  • match discard-class
  • match dscp
  • match fr-dlci
  • match input-interface
  • match interface
  • match ip address
  • match ip dscp
  • match ip next-hop
  • match ip precedence
  • match ip route-source
  • match ip rtp
  • match length
  • match metric
  • match mpls experimental
  • match mpls-label
  • match not
  • match packet length
  • match precedence
  • match protocol
  • match qos-group
  • match route-type
  • match source-address mac
  • match tag
  • maximum-paths
  • max-reserved-bandwidth
  • media-type
  • member
  • menu
  • menu command
  • menu text
  • menu title
  • metric holddown
  • metric maximum-hops
  • metric weights
  • mkdir
  • modem
  • monitor session
  • more
  • motd-banner
  • mpls atm control-vc
  • mpls atm cos
  • mpls atm disable-headend-vc
  • mpls atm multi-vc
  • mpls atm vpi
  • mpls atm vp-tunnel
  • mpls cos-map
  • mpls ip
  • mpls ip default-route
  • mpls ip encapsulate explicit-null
  • mpls ip ttl-expiration pop
  • mpls label protocol
  • mpls label range
  • mpls mtu
  • mpls prefix-map
  • mpls request-labels for
  • mrinfo
  • mstat
  • mtrace
  • mtu
  • name elan-id
  • name local-seg-id
  • name preempt
  • name server-atm-address
  • neighbor
  • neighbor advertisement-interval
  • neighbor database-filter
  • neighbor default-originate
  • neighbor description
  • neighbor distribute-list
  • neighbor filter-list
  • neighbor maximum-prefix
  • neighbor next-hop-self
  • neighbor password
  • neighbor peer-group
  • neighbor prefix-list
  • neighbor remote-as
  • neighbor route-map
  • neighbor route-reflector-client
  • neighbor send-community
  • neighbor send-label
  • neighbor shutdown
  • neighbor soft-reconfiguration inbound
  • neighbor ttl-security
  • neighbor timers
  • neighbor ttl-security
  • neighbor update-source
  • neighbor version
  • neighbor weight
  • net
  • network
  • network backdoor
  • network weight
  • nrzi-encoding
  • ntp access-group
  • ntp authenticate
  • ntp authentication-key
  • ntp broadcast
  • ntp broadcast client
  • ntp broadcastdelay
  • ntp disable
  • ntp master
  • ntp peer
  • ntp server
  • ntp source
  • ntp trusted-key
  • ntp update-calendar
  • offset-list
  • ospf auto-cost reference-bandwidth
  • ospf log-adj-changes
  • output-delay
  • padding
  • parity
  • passive-interface
  • password
  • peer default ip address
  • peer neighbor-route
  • physical-layer
  • ping
  • police
  • policy-map
  • ppp
  • ppp authentication
  • ppp bridge ip
  • ppp chap
  • ppp compress
  • ppp multilink
  • ppp quality
  • ppp reliable-link
  • ppp use-tacacs
  • priority-group
  • priority-list
  • privilege level (global)
  • privilege level (line)
  • prompt
  • pulse-time
  • pvc
  • qos pre-classify
  • queue-limit
  • queue-list
  • radius-server
  • random-detect
  • random-detect discard-class
  • random-detect discard-class-based
  • random-detect dscp
  • random-detect ecn
  • random-detect exponential-weighting-constant
  • random-detect flow
  • rate-limit
  • redistribute
  • refuse-message
  • reload
  • rename
  • ring-speed
  • rlogin
  • rmdir
  • route-map
  • router
  • rsh
  • rxspeed
  • send
  • service
  • service compress-config
  • service linenumber
  • service-module 56k
  • service-module t1
  • service-policy (interface)
  • service-policy (policy-map)
  • service timestamps
  • session-limit
  • session-timeout
  • set as-path
  • set atm-clp
  • set automatic-tag
  • set community
  • set cos
  • set default interface
  • set discard-class
  • set dscp
  • set fr-de
  • set interface
  • set ip default next-hop
  • set ip next-hop
  • set ip precedence
  • set ip tos
  • set level
  • set local-preference
  • set metric
  • set metric-type
  • set metric-type internal
  • set mpls-label
  • set origin
  • set ospf router-id
  • set-overload-bit
  • set precedence
  • set qos-group
  • set tag
  • setup
  • set weight
  • shape
  • show
  • shutdown
  • smt-queue-threshold
  • snapshot
  • snmp-server
  • snmp-server chassis-id
  • snmp-server community
  • snmp-server contact
  • snmp-server enable traps
  • snmp-server engine-id
  • snmp-server group
  • snmp-server host
  • snmp-server location
  • snmp-server packetsize
  • snmp-server queue-length
  • snmp-server system-shutdown
  • snmp-server tftp-server-list
  • snmp-server trap-source
  • snmp-server trap-timeout
  • snmp-server user
  • snmp-server view
  • snmp trap link-status
  • source-address
  • spanning-tree backbonefast
  • spanning-tree cost
  • spanning-tree port-priority
  • spanning-tree vlan
  • speed
  • squeeze
  • squelch
  • sscop cc-timer
  • sscop keepalive-timer
  • sscop max-cc
  • sscop poll-timer
  • sscop rcv-window
  • sscop send-window
  • standby authentication
  • standby ip
  • standby preempt
  • standby priority
  • standby timers
  • standby track
  • stopbits
  • summary-address
  • synchronization
  • table-map
  • tacacs-server attempts
  • tacacs-server authenticate
  • tacacs-server directed-request
  • tacacs-server extended
  • tacacs-server host
  • tacacs-server key
  • tacacs-server last-resort
  • tacacs-server notify
  • tacacs-server optional-passwords
  • tacacs-server retransmit
  • tacacs-server timeout
  • tag-switching
  • terminal editing
  • terminal escape-character
  • terminal history
  • terminal length
  • terminal monitor
  • tftp-server
  • timers basic
  • timers bgp
  • timers spf
  • trace, traceroute
  • traffic-shape adaptive
  • traffic-shape fecn-adapt
  • traffic-shape group
  • traffic-shape rate
  • traffic-share
  • transport
  • tunnel checksum
  • tunnel destination
  • tunnel key
  • tunnel mode
  • tunnel sequence-datagrams
  • tunnel source
  • txspeed
  • undebug
  • undelete
  • username
  • vacant-message
  • validate-update-source
  • variance
  • verify
  • version
  • vlan
  • vlan database
  • vtp client
  • vtp domain
  • vtp password
  • vtp server
  • vtp transparent
  • vtp v2-mode
  • vty-async
  • vty-async dynamic-routing
  • vty-async header-compression
  • vty-async keepalive
  • vty-async mtu
  • vty-async ppp authentication
  • vty-async ppp use-tacacs
  • width
  • write
• A. Appendix: Network Basics
  • A.1. IPv4 Subnetting
    • A.1.1. Classless Inter-Domain Routing
      • A.1.1.1. CIDR notation
    • A.1.2. Subnet Math
      • A.1.2.1. Subnet zero reminder
      • A.1.2.2. Calculating a network address from a host address
      • A.1.2.3. Calculating the broadcast address of a subnet
      • A.1.2.4. Calculating available subnets
      • A.1.2.5. Calculating the number of hosts per subnet
    • A.1.3. More about Subnets
      • A.1.3.1. Private address space
      • A.1.3.2. Changing the way the router displays subnet information
      • A.1.3.3. Variable Length Subnet Masks (VLSM)
  • A.2. OSI Reference Model
    • A.2.1. Application Layer
    • A.2.2. Presentation Layer
    • A.2.3. Session Layer
    • A.2.4. Transport Layer
    • A.2.5. Network Layer
    • A.2.6. Data Link Layer
    • A.2.7. Physical Layer
  • A.3. IPv6
    • A.3.1. IPv6 Notation
      • A.3.1.1. Shorthand rule one
      • A.3.1.2. Shorthand rule two
    • A.3.2. Important IPv6 Addresses
    • A.3.3. Enabling IPv6 on a Router
    • A.3.4. Using an IPv6 Address in a URL
• 18. About the Author
• Index
• About the Author
• Colophon
• Copyright