Technical data
Table Of Contents
- Preface
- Introduction
- Chapter 1. Advanced Topics
- Chapter 2. Planning For Router Configuration
- Important Terminology
- Collect your Configuration Information
- PPP Link Protocol (over ATM or Frame Relay)
- IP Routing Network Protocol
- IPX Routing Network Protocol
- Bridging Network Protocol
- RFC 1483 / RFC 1490 Link Protocols
- IP Routing Network Protocol
- IPX Routing Network Protocol
- Bridging Network Protocol
- MAC Encapsulated Routing: RFC 1483MER / RFC 1490MER Link Protocols
- IP Routing Network Protocol
- FRF8 Link Protocol
- IP Routing Network Protocol
- Dual Ethernet Router Configuration
- General Information
- Configuring the Dual Ethernet Router as a Bridge
- Configuring the Dual Ethernet Router for IP Routing
- Chapter 3. Configuring Router Software
- Configuration Tables
- Configuring PPP with IP Routing
- Configuring PPP with IPX Routing
- Configuring PPP with Bridging
- Configuring RFC 1483 / RFC 1490 with IP Routing
- Configuring RFC 1483 / RFC 1490 with IPX Routing
- Configuring RFC 1483 / RFC 1490 with Bridging
- Configuring MAC Encapsulated Routing: RFC 1483MER / RFC 1490MER with IP Routing
- Configuring FRF8 with IP Routing
- Configuring Mixed Network Protocols
- Configuring a Dual Ethernet Router for IP Routing
- Verify the Router Configuration
- Sample Configurations
- Sample Configuration 1 — PPP with IP and IPX
- Scenario
- Sample Configuration 1 — Diagram for Target Router (SOHO)
- Sample Configuration 1 — Tables For Target Router (SOHO)
- Sample Configuration 1 - Check the Configuration with the “list” Commands
- Information About Names And Passwords
- Sample Configuration 2 — RFC 1483 with IP and Bridging
- Scenario
- Sample Configuration 2 — Diagram for Target Router SOHO
- Sample Configuration 2 — Tables For Target Router (SOHO)
- Sample Configuration 2 - Check the Configuration with the “list” Commands
- Sample Configuration 3 — Configuring a Dual Ethernet Router for IP Routing
- Scenario
- Configuration Tables
- Chapter 4. Configuring Special Features
- Bridging Filtering and IP Firewall
- IP (RIP) Protocol Controls
- DHCP (Dynamic Host Configuration Protocol)
- General Information
- Manipulating Subnetworks and Explicit Client Leases
- Enabling/disabling a subnetwork or a client lease
- Adding subnetworks and client leases
- Setting the lease time
- Manually changing client leases
- Setting Option Values
- Concepts
- Commands for global option values
- Commands for specific option values for a subnetwork
- Commands for specific option values for a client lease
- Commands for listing and checking option values
- BootP
- About BootP and DHCP
- Enable/Disable BootP
- Use BootP to specify the boot server
- Defining Option Types
- Concepts
- Commands
- Configuring BootP/DHCP Relays
- Other Information
- NAT (Network Address Translation)
- Management Security
- Software Options Keys
- Encryption
- IP Filtering
- L2TP Tunneling - Virtual Dial-Up
- Introduction
- L2TP Concepts
- LNS, L2TP Client, LAC, and Dial User
- L2TP Client Example
- LNS and L2TP Client Relationship
- Tunnels
- Sessions
- Configuration
- Preliminary Steps to Configure a Tunnel
- Verification Steps
- Configuration Commands
- PPP Session Configuration
- Sample Configurations
- Simple L2TP Client Configuration Example
- Complete LNS and L2TP Client Configuration Example
- Configuration Process
- Chapter 5. Command Line Interface Reference
- Command Line Interface Conventions
- System Level Commands
- Router Configuration Commands
- Target Router System Configuration Commands (SYSTEM)
- Target Router Ethernet LAN Bridging and Routing (ETH)
- Remote Router Access Configuration (REMOTE)
- Asymmetric Digital Subscriber Line Commands (ADSL)
- Asynchronous Transfer Mode Commands (ATM)
- Dual Ethernet Router Commands (ETH)
- General information
- High-Speed Digital Subscriber Line Commands (HDSL)
- General information about HDSL
- ISDN Digital Subscriber Line (IDSL)
- General information about IDSL
- Symmetric Digital Subscriber Line Commands (SDSL)
- General information about SDSL
- Dynamic Host Configuration Protocol Commands (DHCP)
- L2TP — Virtual Dial-Up Configuration (L2TP)
- Bridging Filtering Commands (FILTER BR)
- Save Configuration Commands (SAVE)
- Erase Configuration Commands (ERASE)
- File System Commands
- Chapter 6. Managing the Router
- Simple Network Management Protocol (SNMP)
- TELNET Remote Access
- Client TFTP Facility
- TFTP Server
- BootP Server
- Boot Code
- Manual Boot Menu
- Access Manual Boot Mode
- Option 1: Retry Start-up
- Option 2: Boot from FLASH Memory
- Option 3: Boot from Network
- Option 4: Boot from Specific File
- Option 5: Configure Boot System
- Option 6: Set Time and Date
- Option 7: Set Console Baud Rate
- Option 8: Start Extended Diagnostics
- Identifying Fatal Boot Failures
- Software Kernel Upgrades
- Backup and Restore Configuration Files
- FLASH Memory Recovery Procedures
- Recovering Passwords and IP Addresses
- Batch File Command Execution
- Chapter 7. Troubleshooting
- Appendix A. Network Information Worksheets
- Configuring PPP with IP Routing
- Configuring PPP with IPX Routing
- Configuring PPP with Bridging
- Configuring RFC 1483 / RFC 1490 with IP Routing
- Configuring RFC 1483 / RFC 1490 with IPX Routing
- Configuring RFC 1483 / RFC 1490 with Bridging
- Configuring RFC 1483MER / RFC 1490MER with IP Routing
- Configuring FRF8 with IP Routing
- Configuring a Dual Ethernet Router for IP Routing
- Appendix B. Configuring IPX Routing
- Index
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Chapter 1. Advanced Topics
This chapter provides information on advanced topics useful to network administrators. Refer to the
User Guide
for a general overview of the router basic features.
Interoperability
The router uses industry-wide standards to ensure compatibility with routers and equipment from other vendors.
To interoperate, the router supports standard protocols on the physical level, data link level for frame type or
encapsulation method, and network level. For two systems to communicate directly, they must use the same
protocol at each level. Most protocols do not support negotiable options, except for PPP.
The physical protocol level includes hardware and electrical signaling characteristics. This support is provided by
the router Ethernet and modem hardware interfaces.
The data link protocol level defines the transmission of data packets between two systems over the LAN or WAN
physical link.
The frame type or encapsulation method defines a way to run multiple network-level protocols over a single LAN
or WAN link. The router supports the following WAN encapsulations:
• PPP (VC multiplexing)
• PPP (LLC multiplexing)
• RFC 1483 (for ATM)
• RFC 1483 with MAC Encapsulation Routing (for ATM)
• FRF8 (for ATM)
• RFC 1490 (for Frame Relay)
• RFC 1490 with MAC Encapsulated Routing (for Frame Relay)
Routing
The network protocol provides a way to route user data from source to destination over different LAN and WAN
links. Routing relies on routing address tables to determine the best path for each packet to take.
The routing tables can be seeded; i.e., addresses for remote destinations are placed in the table along with path
details and the associated costs (path latency).
The routing tables are also built dynamically; i.e., the location of remote stations, hosts, and networks are updated
from broadcast packet information.
Routing helps to increase network capacity by localizing traffic on LAN segments. It also provides security by
isolating traffic on segmented LAN. Routing extends the reach of networks beyond the limits of each LAN
segment.