Perle Systems IOLINK-520 manual Ping, Time and Mask server

Page 7

Introduction

Ping

The “ping” message is actually a query status message that may be sent to devices on the LAN to determine their operation status. The LAN device will reply with a message if it is active.

Time and Mask server

Two other ICMP messages are used to query the time and/or subnet mask from a particular LAN device. A message is sent to a LAN device asking for the time or mask, and the device replies appropriately.

1.6— IOLINK-PRO & 520 Reference Manual

Image 7

Contents Reference Manual IP Routing and the IOLINK-PRO & 520 Routers IOLINK-PRO & 520 RoutersProxy ARP ARP-Address Resolution ProtocolComplete IP Connection IOLINK-PRO & 520 Reference Manua Header Checksum IP Header DetailsProtocol Time to liveRedirect Icmp MessagesOptions UnreachableTime and Mask server PingRIP-Routing Information Protocol Update MechanismRoute Tables IPX Address Format IPX Routing and The IOLINK-PRO & 520 RoutersIPX Addressing Network Layer Addressing vs. MAC AddressingIPX Header Other IPX Header InformationEstablishing an IPX Connection Service Advertisement ProtocolSAP Broadcasts RIP/X Operation Server TypesRouting Information Protocol SAP RequestsRIP/X Requests Bridging and the IOLINK-PRO & 520 RoutersRIP/X Metrics Station Address Learning Initial Bridging ProcessAddress Purging Aging TimerAging Exception Filled Address TableTelnet Iolink Router Feature DefinitionsLink Compression Introduction Multipoint WAN TopologiesBandwidth On Demand Point-to-PointTime of Day Connect Application Operating Software Upgrades Disaster Recovery Backup LinkIsdn Single Active Link & Dual Active Link Wide Area Network Topologies Supported Iolink PRO & 520 Isdn Connection ManagementCall Establishment Methods Auto-Call Time-of-Day Connections Isdn Connection ManagementManual Call Address ConnectCombination Connection ProcessInteresting Traffic Idle TimerProtocol Awareness Suspension ProcessTermination Process Session Keepalive MessagesRIP-Routing Information Protocol IP SpecificsIP Address Connect Suspension of TCP/IP SessionsIPX Serialization Frames IPX SpecificsRIP/IPX and SAP/IPX Suspension of IPX SessionsModule Identification Pinout InformationLink Clocking Information Link Interfaces Reference ATL CSU/DSU Link Module InformationConsole Pinouts T1/E1 Module CSU/DSU ModuleRS232 Link Pinouts 24 & RS232C Link PinoutsDB15 Female DTE Direction Contact Circuits From Number 11 & X.21 Link PinoutsDB25 Female DTE Direction Contact Circuit From Number Name RS442 & RS530 Link PinoutsDB25 Link PinoutsNumber Name 11 RS232 Null-Modem Cable RS232 Null-Modem Cable Configuration12 V.35 Null-Modem Cable Null-Modem Cable Configuration13 RS530 Null-Modem Cable RS530 Null-Modem Cable Configuration14 RS530 to RS449 Conversion Cable RS530 To RS449 Conversion Cable15 V.11/X.21 Null-Modem Cable 11/X.21 Null-Modem Cable ConfigurationWAN Link Control-Signal Operation Event logs Appendix a Event LogsEvent Logs IOLINK-PRO & 520 Reference Manual A.3 Event Logs IOLINK-PRO & 520 Reference Manual A.5 Event Logs IOLINK-PRO & 520 Reference Manual A.7 Event Logs Alarm Logs Event Logs IOLINK-PRO & 520 Reference Manual A.11 Event Logs IOLINK-PRO & 520 Reference Manual A.13 Event Logs IOLINK-PRO & 520 Reference Manual A.15 Event Logs IOLINK-PRO & 520 Reference Manual A.17 Event Logs IOLINK-PRO & 520 Reference Manual A.19 PPP Security Logs Security MAC Address FilteringSecurity-Filter if Destination Programmable FilteringSecurity-Filter if Source Security-Forward if Destination Security-Forward if Source Programmable Filtering Bridge Pattern Filtering Pattern Filter OperatorsProtocol Discrimination IP, and no more Protocol Type FieldInternet Protocol IP Filter all IP PacketsFilter all except TCP/IP Transport Control Protocol / Internet Protocol TCP/IPFilter only TCP/IP Filter all IP without TCP trafficEthernet Multicasting Bandwidth ConservationFilter all DEC Ethernet BroadcastingInternet Addresses General RestrictionsEthernet Station Addresses Mask would be 6-010203040506&12-0800&23-06 Example Mask CombinationsIPX Router Pattern Filtering IP Router Pattern FilteringPage Appendix C Frame Formats Octet Locations on an IP Routed TCP/IP Frame IOLINK-PRO & 520 Reference Manual C.3