User's Manual
Table Of Contents
- Chapter 1 Introduction
- Product Description and Contents
- Product Features
- Chapter 2 Quick Start
- Rooftop and Tower Installations Warning
- Installation Steps
- Installation Diagrams
- Chapter 3 Hardware
- Drawings of Components
- SPEEDLAN 8500 ODU Hardware
- Antenna
- Restoring Factory Default Settings on the SPEEDLAN 8500 IDU
- Upgrading the Firmware
- Chapter 4 Overview of Configurator
- Installation and Setup
- Toolbar and Menus
- Chapter 5 Configuring SPEEDLAN
- General Setup
- Interface & Advanced Interface Setup
- The Setup Buttons
- Chapter 6 Bridging Setup
- IDU Setup
- Chapter 7 Setting Up the IP Addresses (IP Host Setup)
- Part I - Quick Overview of IP Addressing
- Part II - Setting Up the IP Address
- Part III - Setting Up NAT
- Chapter 8 IP-Router Setup
- IP Routing Setup
- Chapter 9 SNMP Setup
- SNMP Setup
- Chapter 10 System Access Setup
- System Access Setup
- Chapter 11 SNMP Monitoring
- Remote Statistics
- Interface Monitor
- Ethernet-like Interface Monitor
- SectorPRC Station Entries
- 11Mb RF Interface
- SNMP Monitor
- IP Monitor
- IP/TCP/UDP Monitor
- ICMP Monitor
- Chapter 12 Tables
- System Information
- IDU Learn Table
- IP ARP Table
- IP Route Table
- IP/TCP Connection Table
- IP/UDP Listener Table
- Local IP-Address Table
- Chapter 13 Analyzing Wireless Equipment
- Select Another Device
- Analysis Polling Interval
- Wireless Link Test
- Antenna Alignment
- Glossary for Standard Data Communications
- Glossary for Standard Data Communications
- Appendixes
- Appendix A Protocols & Ethernet Addresses
- Common Ethernet Protocols
- Common Ethernet Vendor Addresses
- Common Ethernet Multicast Addresses
- Common Ethernet Broadcast Addresses
- Appendix B Startup LED Patterns
- Startup LED Patterns
SPEEDLAN 8500 Series Installation and Operation User Guide
Bridging Setup 6-5
Advanced Features Button
Clicking Advanced displays this dialog box. Select the appropriate check box for your network. The
check boxes are described below:
• Pass Bad Ethernet Source
The standard Ethernet IDUs we have tested will pass Ethernet packets with a broadcast or
multicast address as their source (i.e., packets with their first bit set to 1). The Ethernet
specification for Transparent (i.e. Non-Source-Routing) IDUs does not allow these types of
packets, which are considered bad packets. Our studies have shown that a common failure
mode of many Ethernet interfaces and networking software is to transmit packets like these.
If you do not need to permit Source-Routing packets, we suggest that you deny these
packets. The default setting is selected to permit these packets.
• Pass Unseen Ethernet Source
Standard Ethernet IDUs will always forward packets with destination addresses that have not
been learned (i.e., have not previously been seen as a source address of a packet). This
characteristic is needed in order for the Ethernet IDU to operate correctly. The downside to
this, as our studies have shown, is the failure mode of many Ethernet interface cards will
send out erroneous packets with good CRCs but with random Ethernet destination and
source addresses. Standard IDUs will permit these erroneous packets because they have not
"learned" the random destination, and then add this packet's random source address to
their finite learned table. This situation is not uncommon and can greatly hinder the
operation of standard IDUs. If you choose to deny unlearned packets, the IDU will not
forward unicast packets to Ethernet addresses that have not already been seen as a source
address. This scheme works for most protocols because it relies on the characteristics of
most upper-layer protocols to transmit ARP requests or hello packets. After careful testing
and consideration, only qualified network engineers should select the Deny option.
The default value for this setting is selected.