Omega Speaker Systems iLD Series manual ARP Protocol, ARP Commands and Responses

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4.11 ARP Protocol

ARP is the Internet layer protocol responsible for determining the MAC (hardware) address that corresponds to a particular IP address. The ARP command allows the user to view the current contents of the ARP cache of the local computer (residing on the same network) or remote computer (residing on the different network) through a router.

Microsoft includes the ARP.EXE utility for viewing and modifying the ARP cache with its Windows products. The following ARP commands can be used to view cache entries:

•arp –a ➞ Use this command to view all ARP cache entries.

•arp –a plus IP address ➞ Use this command to view ARP cache entries associated with one particular interface on a network with multiple adapters.

•arp –g ➞ Same as arp –a.

•arp –N ➞ Use this command to display ARP entries for specific network interface.

•arp – s plus IP address plus Physical address ➞ Use this command to manually add a permanent static entry to the ARP cache.

•arp –d ➞ Use this command to manually delete a static entry.

Ping the destination computer using IP address first before using the arp -a command.

The following window shows examples of arp commands and responses.

•Your computer has an IP address of 192.168.1.118

•The destination computer has an IP address of 192.168.1.96

C:\>arp - 192.168.1.96

No ARP Entries Found

C:\>ping 192.168.1.96

Pinging 192.168.1.96 with 32 bytes of data:

Reply from 192.168.1.96=bytes=32 time=5ms TTL=32

Reply from 192.168.1.96=bytes=32 time=3ms TTL=32

Reply from 192.168.1.96=bytes=32 time=3ms TTL=32

Reply from 192.168.1.96=bytes=32 time=4ms TTL=32

C:\>arp -a 192.168.1.96

Interface: 192.168.1.118

Internet Address Physical Addresss Type

192.168.1.96 00-03-34-00-00-23 dynamic C:\>arp -s 192.168.1.96 00-03-34-00-00-23 C:\>arp -a 192.168.1.96

Interface: 192.168.1.118

Internet Address Physical Addresss Type

192.168.1.96 00-03-34-00-00-23 static C:\>arp -d 192.168.1.96

C:\>arp -a 192.168.1.96 No ARP Entries Found C:\>

Figure 4.18 ARP Commands and Responses

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Contents User’s Guide Servicing North America OMEGAnet On-Line Service Internet e-mail Info@omega.comTable of Contents List of Tables Rear Panel View of i16 and i8 Series Meters withCustomer Service Before You Begin Inspecting Your ShipmentManuals, Software Safety and EMC Considerations Part IntroductionEMC Considerations IServer on the Ethernet Network Physical Characteristics and Mounting Part HardwareTB4 Network Communication Interface Section DIP Switches on the iServerSerial Communication Interfaces For Models with RS485 Port Data Transmission Characteristics RS485Wiring RS485 Interface Half Duplex Hookup TB4 Pin# ILD Big DisplayDevice # with RS485 Network Communication Interfaces 1 10Base-T RJ-45 Pinout RJ45 Pinout 2 10Base-T Crossover WiringPart Network Configuration Network ProtocolsEthernet MAC Address Dhcp DIP Switch on the iServer DNSDefault IP Address IP AddressPort Number Part Operations Command Prefix Command Class MeaningLSB MSB Pinging eis03ec MS-DOS Prompt IServer Home Page Menu Device TypeRead Devices Device Setpoints Read DevicesDevice Setup Modify Device Parameters or Device List Entry Device Setup10 Configuration Serial Communication ConfigurationTerminal Server Device No. Refer to Section 11 Access Control Access Control3 4 OFF Access Control Host Name Refer to .4, DNS12 Access Control Setting a New IP Address over the NetworkTerminal Server Function 13 Terminal Server Configuration14 Terminal Emulation Terminal EmulationTera Term Telnet Connection Screen Telnet Setup17 Telnet Setup iServer Help Httpget Program \iServer\Httpget\httpget -r -S *01X01\r01X01074.3 ARP Protocol 18 ARP Commands and Responses19 PC-to-Device Communication Remote Access TunnelingRemote iServer 21 Configuration Menu Remote iServerUnder Terminal Server section, set Number of Connections to Local iServerMail Notifier Software InstallationEmail Connection Mapi Access Program Options Setup and Configuration25 iServer Mail Notifier Device Setting Device Setting and Configuration Device setup requiresNetwork Interface Part Specifications Serial InterfaceProcessor CPU Internal WEB ServerSerial Interface Network InterfaceAppendix a Glossary Appendix B IP Address Mask Dotted Notation Mask Binary Mask Bits Class a Appendix C IP NetmaskClass B Class CAscii Appendix D Ascii ChartDec Hex Binary Dec Hex Binary Char No Parity No parityAscii Control Codes Appendix D Ascii Chart ContinuationDec Hex Ctrl Key Definition Dec Hex Ctrl Key Definition Char EquivPart Approvals Information CE Approvals Information WARRANTY/DISCLAIMER Shop on line at omega.com
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