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OLT-1308 Series User’s Guide
229
C
H A P T E R
35
ARP Table
This chapter introduces ARP Table.
35.1 Introduction to ARP Table
Address Resolution Protocol (ARP) is a protocol for mapping an Internet Protocol address (IP
address) to a physical machine address, also known as a Media Access Control or MAC
address, on the local area network.
An IP (version 4) address is 32 bits long. In an Ethernet LAN, MAC addresses are 48 bits
long. The ARP Table maintains an association between each MAC address and its
corresponding IP address.
35.1.1 How ARP Works
When an incoming packet destined for a host device on a local area network arrives at the
switch, the switch's ARP program looks in the ARP Table and, if it finds the address, sends it
to the device.
If no entry is found for the IP address, ARP broadcasts the request to all the devices on the
LAN. The switch fills in its own MAC and IP address in the sender address fields, and puts the
known IP address of the target in the target IP address field. In addition, the switch puts all
ones in the target MAC field (FF.FF.FF.FF.FF.FF is the Ethernet broadcast address). The
replying device (which is either the IP address of the device being sought or the router that
knows the way) replaces the broadcast address with the target's MAC address, swaps the
sender and target pairs, and unicasts the answer directly back to the requesting machine. ARP
updates the ARP Table for future reference and then sends the packet to the MAC address that
replied.
35.2 Viewing ARP Table
Click
Management
in the navigation panel and then
ARP Table
to open the following screen.
The ARP table can hold up to 500 entries.
Содержание OLT-1308
Страница 1: ...www zyxel com OLT 1308 Series Optical Line Terminal User s Guide Version 3 60 1 2007 Edition 1 ...
Страница 2: ......
Страница 7: ...Safety Warnings OLT 1308 Series User s Guide 7 ...
Страница 8: ...Safety Warnings OLT 1308 Series User s Guide 8 ...
Страница 28: ...List of Tables OLT 1308 Series User s Guide 28 ...
Страница 29: ...29 PART I Introduction Introducing the OLT 31 Hardware Installation and Connection 35 Hardware Overview 39 ...
Страница 30: ...30 ...
Страница 34: ...Chapter 1 Introducing the OLT OLT 1308 Series User s Guide 34 ...
Страница 38: ...Chapter 2 Hardware Installation and Connection OLT 1308 Series User s Guide 38 ...
Страница 44: ...44 ...
Страница 58: ...Chapter 5 Initial Setup Example OLT 1308 Series User s Guide 58 ...
Страница 72: ...Chapter 6 System Status and Port Statistics OLT 1308 Series User s Guide 72 ...
Страница 94: ...Chapter 7 Basic Setting OLT 1308 Series User s Guide 94 ...
Страница 96: ...96 ...
Страница 106: ...Chapter 8 VLAN OLT 1308 Series User s Guide 106 ...
Страница 116: ...Chapter 11 Spanning Tree Protocol OLT 1308 Series User s Guide 116 ...
Страница 126: ...Chapter 15 Link Aggregation OLT 1308 Series User s Guide 126 ...
Страница 132: ...Chapter 17 Queuing Method OLT 1308 Series User s Guide 132 ...
Страница 138: ...Chapter 18 Classifier OLT 1308 Series User s Guide 138 ...
Страница 143: ...Chapter 19 Policy OLT 1308 Series User s Guide 143 Figure 53 Policy Example ...
Страница 144: ...Chapter 19 Policy OLT 1308 Series User s Guide 144 ...
Страница 158: ...158 ...
Страница 162: ...Chapter 22 Classification Filter Profile OLT 1308 Series User s Guide 162 ...
Страница 172: ...Chapter 23 VLAN Profile OLT 1308 Series User s Guide 172 ...
Страница 184: ...Chapter 26 Destination Filter OLT 1308 Series User s Guide 184 ...
Страница 188: ...Chapter 27 Port Authentication OLT 1308 Series User s Guide 188 ...
Страница 190: ...190 ...
Страница 200: ...Chapter 29 Maintenance OLT 1308 Series User s Guide 200 ...
Страница 212: ...Chapter 30 Access Control OLT 1308 Series User s Guide 212 ...
Страница 218: ...Chapter 32 Syslog OLT 1308 Series User s Guide 218 ...
Страница 224: ...Chapter 33 Cluster Management OLT 1308 Series User s Guide 224 ...
Страница 228: ...Chapter 34 MAC Table OLT 1308 Series User s Guide 228 ...
Страница 232: ...Chapter 36 IGMP Table OLT 1308 Series User s Guide 232 ...
Страница 233: ...233 PART VI Commands and Troubleshooting Introducing the Commands 235 Command Examples 271 Troubleshooting 287 ...
Страница 234: ...234 ...
Страница 285: ...Chapter 38 Command Examples OLT 1308 Series User s Guide 285 ...
Страница 286: ...Chapter 38 Command Examples OLT 1308 Series User s Guide 286 ...
Страница 294: ...Chapter 39 Troubleshooting OLT 1308 Series User s Guide 294 ...
Страница 295: ...295 PART VII Appendix and Index Product Specifications 297 Legal Information 299 Customer Support 303 Index 307 ...
Страница 296: ...296 ...
Страница 302: ...Appendix B Legal Information OLT 1308 Series User s Guide 302 ...
Страница 314: ...Index OLT 1308 Series User s Guide 314 ...