VIRATA ADSL Ethernet Router Series User manual

ADSL Ethernet Router Series
Technical Manual
Version 1.5
Protocols Discussed:
RFC 2684 (RFC 1483) Ethernet Framing
RFC 2684 (RFC 1483) IP Framing
RFC 2225 (RFC 1577) IPoA
RFC 2516 PPPoE
RFC 2364 PPPoA
Transparent Bridge

©Copyright, December 2001. All Rights Reserved.
(P/N: 040-513447-151) (Ref: 9009000)
• Virata is a registered trademark of Virata Corporation.
• All other company or product names are trademarks or registered trademarks or
service marks of their respective owners and are hereby recognized as such.

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Safety Guidelines
Adhere to the following safety guidelines when using your unit to reduce the risk of
fire, electric shock and injury.
Understand all instructions in the manual. Follow all instruction labels found
on the unit.
Except for the power adapter supplied, the unit should not be connected to
other adapters/power supplies.
Never spill liquid of any kind on the unit.
Do not place the unit on an unstable stand or table. The unit may drop and
become damaged.
Do not expose the unit to direct sunlight.
Do not put any heat generating devices close to the unit as it may degrade or
cause damage to it.
Do not stack the unit on top of each other. / Do not put any heavy object on
top of the unit
Do not use liquid cleaners or aerosol cleaners. Use a soft, dry cloth for
cleaning.
Product warranty does not apply to damage caused by lightning, power surges or wrong
voltageusage.

Contents
Safety Guidelines ......................................................................... iii
About This Manual ....................................................................... ix
Conventions Used ........................................................................ x
1. Setting Up Local Management ................................................... 2-1
1.1 Setting up the Serial Link ................................................... 2-1
1.2 Configuring the Serial Link .................................................. 2-1
2. Basic Commands on Running Local Management ..................... 3-1
2.1 Guidelines ........................................................................ 3-1
2.2 Checking Your Router Performances ..................................... 3-2
2.3 Checking Your Router Entries .............................................. 3-2
2.4 To Disconnect/Connect the ADSL Link .................................. 3-3
2.5 To Toggle between Various Modes ........................................ 3-3
3. Configuring Your Router ........................................................... 4-1
3.1 Configuration Flow Chart .................................................... 4-1
3.2 Network Setup Overview .................................................... 4-2
3.3 Configuring the Basics........................................................ 4-4
3.3.1 Configuring the Basics:
Step 1 - Resetting your Router's Configuration ..... 4-5
3.3.2 Configuring the Basics:
Step 2 - Configuring the LAN ............................. 4-7
3.3.3 Configuring the Basics:
Step 3 - Configuring the WAN ............................ 4-7
i) Configuring the WAN - For RFC 2684
(RFC 1483) Ethernet Framing .................. 4-7
ii) Configuring the WAN - For RFC 2684
(RFC 1483) IP Framing ........................... 4-8
iii) Configuring the WAN - For RFC 2225
(RFC 1577) IPoA .................................... 4-9
iv) Configuring the WAN - For RFC 2364 PPPoA . 4-10
v) Configuring the WAN - For RFC 2516 PPPoE . 4-11

3.3.4 Configuring the Basics:
Step 4 - Configuring the Routing Table ................ 4-12
3.3.5 Configuring the Basics:
Step 5 - Enabling IP Forwarding ......................... 4-12
3.3.6 Configuring the Basics: Step 6 - Enabling NAT .... 4-12
3.3.7 Configuring the Basics:
Step 7 - Saving the Configurations ...................... 4-12
3.4 Setting Up NAT Inbound Port Forwarding
(Port Address Translation) ................................................... 4-13
3.5 Configuring DHCP Server .................................................... 4-15
3.5.1 Some useful commands for DHCP ...................... 4-15
3.5.2 DHCP Server Illustration .................................... 4-16
3.6 Configuring DNS Relay ....................................................... 4-17
3.6.1 To Enable DNS Relay (with fixed IP address from your
ADSL Service Provider) ...................................... 4-17
3.6.2 To Check DNS Relay Server Status ...................... 4-17
3.6.3 To Disable DNS Relay ........................................ 4-17
3.7 Setting Up SNMP .............................................................. 4-18
3.7.1 Read/Write Access ............................................ 4-18
3.7.2 SNMP Trap ....................................................... 4-19
3.8 Setting up Telnet Access ..................................................... 4-19
3.9 Configuring Autoloop for IP Interface .................................... 4-20
4. Configuring Your Transparent Bridge ........................................ 5-1
4.1 Network Setup Overview .................................................... 5-1
4.2 Configuring the Basics ........................................................ 5-1
4.2.1 Step 1: Resetting your Router's Configuration....................... 5-2
4.2.2 Step 2: Configuring the LAN .............................................. 5-3
4.2.3 Step 3: Saving the Configurations ....................................... 5-3
5. Router Configuration Examples................................................. 6-1
5.1 Example on RFC 2684 (RFC 1483) IP Framing .................... 6-1
5.2 Example on RFC 2364 PPPoA ............................................ 6-2

6. Configuring PPTP (Point-to-Point Tunnelling Protocol) ........... 7-1
6.1 Running the Console Commands ......................................... 7-1
6.1.1 Step 1 - Configuring the LAN ............................. 7-1
6.1.2 Step 2 - Configuring PPP Client and PNS (PPTP
Network Server) ................................................ 7-1
6.1.3 Step 3 - Binding to Ethernet Interface ................ 7-2
6.2 Setting Up Dial-Up Networking ........................................... 7-2
6.2.1 Creating Dial-Up Networking .............................. 7-3
6.2.2 Establishing Your Internet Connection.................. 7-5

Appendix A - Commonly Used Commands ......................................... A-1
A.1 TCP/IP Commands............................................................. A-1
A.1.1 autoloop ........................................................... A-1
A.1.2 config............................................................... A-2
A.1.3 device .............................................................. A-3
A.1.4 ip device .......................................................... A-4
A.1.5 ipatm pvc ......................................................... A-5
A.1.6 relay ................................................................ A-6
A.1.7 rip accept ......................................................... A-7
A.1.8 rip send ............................................................ A-8
A.1.9 route ................................................................ A-9
A.1.10 snmp ................................................................ A-10
A.2 Bridge Commands ............................................................. A-11
A.2.1 device add ........................................................ A-11
A.2.2 device delete .................................................... A-12
A.2.3 device flush ...................................................... A-12
A.2.4 device list ......................................................... A-13
A.3 PPP Commands ................................................................ A-14
A.3.1 Console object types .......................................... A-14
A.3.2 Console examples .............................................. A-14
A.3.3 <channel> echo every ...................................... A-15
A.3.4 <channel> pppoe ............................................. A-16
A.3.5 <channel> pvc ................................................. A-18
A.3.6 <channel> welogin ........................................... A-19
A.3.7 user ................................................................. A-19
A.4 NAT Commands ................................................................ A-20
A.4.1 event ................................................................ A-20
A.4.2 inbound / Port Address Translation / Port Mapping A-21
A.4.3 info .................................................................. A-22
A.4.4 interfaces ......................................................... A-23
A.4.5 ip nat ............................................................... A-23
A.4.6 sessions ........................................................... A-24

A.5 DHCP Server Commands .................................................... A-25
A.5.1 config............................................................... A-25
A.5.2 dnsrelay config.................................................. A-27
A.5.3 dnsrelay retry .................................................... A-28
A.5.4 dnsrelay server.................................................. A-28
A.5.5 dnsrelay status .................................................. A-29
A.5.6 dnsrelay trace/untrace ....................................... A-30
A.5.7 help ................................................................. A-31
A.5.8 status ............................................................... A-31
A.5.9 version ............................................................. A-32
A.6 BUN Commands ............................................................... A-33
A.6.1 bun list channels ............................................... A-33
A.7 PPTP Commands .............................................................. A-34
A.7.1 Console object types .......................................... A-34
A.7.2 Console Examples .............................................. A-34
A.7.3 bind ................................................................. A-35
A.7.4 <tunnel> create ............................................... A-36
A.7.5 <tunnel> delete ............................................... A-37
A.7.6 <tunnel> info .................................................. A-37
A.7.7 list ................................................................... A-37
Appendix B - Well-Known TCP/UDP Ports ......................................... B-1

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About This Manual
This manual is written for users who are familiar with console commands. It
contains instructions on how to configure your router for different network configurations.
Chapter 1 - Setting Up Local Management guides you on how to setup and establish
a communication link between your router and PC. With this local mangement
established, you can then start issuing console commands.
Chapter 2 - Basic Commands on Running Local Management gives the basic
commands to run the local management.
Chapter 3 - Configuring Your Router guides you on how to configure your router for
different network configurations. A Configuration Flow Chart is provided. The line
protocols discussed are RFC 2684 (RFC 1483) Ethernet Framing, RFC 2684 (RFC
1483) IP Framing, RFC 2225 (RFC 1577) IP over ATM, RFC 2364 PPPoA and RFC
2516 PPPoE. The configuring of NAT Inbound Port Forwarding, DHCP Server, DNS
Relay and so on, can also be found in this chapter.
Chapter 4 - Configuring Your Transparent Bridge guides you on how to configure
your router for transparent bridge.
Chapter 5 - Router Configuration Examples give you router configuration examples
based on RFC 2684 (RFC 1483) IP Framing and RFC 2364 PPPoA.
Chapter 6 - Configuring PPTP (Point-to-Point Tunnelling Protocol) guides you on the
console commands and setting up of the dial-up networking for PPTP.
You will be able to find detailed descriptions of the console commands at Appendix
A - Commonly Used Commands and the commonly used TCP/UDP Ports atAppendix
B - Well-Known TCP/UDP Ports.

○○○○○ ADSL Ethernet Router Series Technical Manual
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ConventionsUsed
Text that appears in this style are console commands.
Example of console command: ip device add ppp_device ether //ppp/DEVICE=1
Numbers in italics are to be replaced with values from your ISP / System
Administrator.
In the example:
ppp 1 pvc 0 35 ip , you are to replace 1, 0and 35 with
actual values given from your System Administrator.
xNumerics in superscript denote further explanation for the text.
Explanation can mostly be found at the bottom of the same page.
Note boxes are information that you need to pay special attention to.