Perle Systems IOLINK-520 Appendix C

IOLINK-PRO & 520 Reference Manual —

C.1

Appendix C - Frame Formats

This appendix provides octet locations for the various portions of three of the common Ethernet frames. When creating

pattern filters these diagrams will assist in the correct definition of the patterns. The offset numbers are indicated by the

numbers above the frame representations.

Note the differences in the TCP/IP and Novell frames when bridging and when routing. When routing, the TCP/IP and

Novell frames are examined after the Level 2 Ethernet portion of the frame has been stripped from the whole data frame.

This means that the offset numbers now start from 0 at the beginning of the routed frame and not the bridged frame.

Some of the common Ethernet type codes are also shown here. The Ethernet type codes are located at offset 12 of the

bridged Ethernet frame.

Octet Locations on a Bridged TCP/IP Frame

Octet Locations on a Bridged Novell Netware Frame

Contents

Main IOLINK-PRO & 520 Reference Manual 1.1 Section 1 Introduction The IOLINK-PRO & 520 Routers IP Routing and the IOLINK-PRO & 520 Routers 1.2 ARPAddress Resolution Protocol Proxy ARP The Complete IP Connection 1.3 1.4 IOLINK-PRO & 520 Reference Manual IP Header Details 1.5 ICMP Messages Page 1.7 RIPRouting Information Protocol 1.8 IPX Routing and The IOLINK-PRO & 520 Routers IPX Addressing 1.9 1.10 Establishing an IPX Connection Service Advertisement Protocol 1.11 Server Types Routing Information Protocol 1.12 Bridging and the IOLINK-PRO & 520 Routers 1.13 The Initial Bridging Process 1.14 Aging Timer 1.15 Filled Address Table 1.16 IOLINK Router Feature Definitions Telnet Link Compression 1.17 Figure 1 - 6 Typical Throughput Over 56 Kbps Link 1.18 WAN Topologies Bandwidth On Demand IOLINK-PRO & 520 Reference Manua 1.19 1.20 Disaster Recovery Backup Link ISDN Single Active Link & Dual Active Link Operating Software Upgrades 2.1 Section 2 ISDN Connection Management IOLINK PRO & 520 ISDN Connection Management Wide Area Network Topologies Supported Call Establishment Methods 2.2 Page 2.4 Connection Process Page 2.6 IP Specifics 2.8 IPX Specifics 3.1 Section 3 Link Interfaces Reference Pinout Information V.35 Module Identification: Link Clocking Information 3.2 ATL CSU/DSU Link Module Information 3.3 Console Pinouts 3.4 CSU/DSU Module: T1/E1 Module: CSU/DSU T1/E1 3.5 V.24 & RS232C Link Pinouts 3.6 V.11 & X.21 Link Pinouts 3.7 RS442 & RS530 Link Pinouts 3.8 V.35 Link Pinouts 3.9 RS232 Null-Modem Cable Configuration Figure 3 - 11 RS232 Null-Modem Cable 3.10 V.35 Null-Modem Cable Configuration Figure 3 - 12 V.35 Null-Modem Cable 3.11 RS530 Null-Modem Cable Configuration Figure 3 13 RS530 Null-Modem Cable 3.12 RS530 To RS449 Conversion Cable Figure 3 14 RS530 to RS449 Conversion Cable 3.13 V.11/X.21 Null-Modem Cable Configuration 3.14 WAN Link Control-Signal Operation A.1 Appendix A - Event Logs Event logs: A.2 A.3 A.4 A.5 A.6 A.7 Page IOLINK-PRO & 520 Reference Manual A.9 Alarm Logs: A.10 A.11 A.12 A.13 A.14 Code Description A.15 A.16 A.17 A.18 A.19 A.20 PPP Security Logs: B.1 Appendix B - Programmable Filtering MAC Address Filtering Security B.2 B.3 B.4 B.5 B.6 B.7 Pattern Filter Operators Bridge Pattern Filtering Protocol Discrimination B.8 B.9 B.10 Bandwidth Conservation B.11 General Restrictions B.12 B.13 IP Router Pattern Filtering Protocol Discrimination IPX Router Pattern Filtering Page Appendix C - Frame Formats Frame Formats C.2 ETHERNET TYPE CODES Octet Locations on an IP Routed TCP/IP Frame