C
HAPTER
15
| IP Configuration
Address Resolution Protocol
– 572 –
Figure 326: Tracing the Route to a Network Device
A
DDRESS
R
ESOLUTION
P
ROTOCOL
The switch uses Address Resolution Protocol (ARP) to forward traffic from
one hop to the next. ARP is used to map an IP address to a physical layer
(i.e., MAC) address. When an IP frame is received by this switch (or any
standards-based switch/router), it first looks up the MAC address
corresponding to the destination IP address in the ARP cache. If the
address is found, the switch writes the MAC address into the appropriate
field in the frame header, and forwards the frame on to the next hop. IP
traffic passes along the path to its final destination in this way, with each
routing device mapping the destination IP address to the MAC address of
the next hop toward the recipient, until the packet is delivered to the final
destination.
If there is no entry for an IP address in the ARP cache, the switch will
broadcast an ARP request packet to all devices on the network. The ARP
request contains the following fields similar to that shown in this example:
When devices receive this request, they discard it if their address does not
match the destination IP address in the message. However, if it does
match, they write their own hardware address into the destination MAC
address field and send the message back to the source hardware address.
When the source device receives a reply, it writes the destination IP
address and corresponding MAC address into its cache, and forwards the IP
traffic on to the next hop. As long as this entry has not timed out, the
Table 37: Address Resolution Protocol
destination IP address
10.1.0.19
destination MAC address ?
source IP address
10.1.0.253
source MAC address
00-00-ab-cd-00-00
Содержание ECS3510-10PD
Страница 1: ...Management Guide www edge core com 10 Port Layer 2 Fast Ethernet Switch...
Страница 2: ......
Страница 4: ......
Страница 48: ...CONTENTS 48...
Страница 68: ...SECTION I Getting Started 68...
Страница 78: ...CHAPTER 1 Introduction System Defaults 78...
Страница 96: ...CHAPTER 2 Initial Switch Configuration Managing System Files 96...
Страница 98: ...SECTION II Web Configuration 98...
Страница 118: ...CHAPTER 3 Using the Web Interface Navigating the Web Browser Interface 118...
Страница 150: ...CHAPTER 4 Basic Management Tasks Resetting the System 150...
Страница 196: ...CHAPTER 5 Interface Configuration VLAN Trunking 196 Figure 66 Configuring VLAN Trunking...
Страница 238: ...CHAPTER 7 Address Table Settings Configuring MAC Address Mirroring 238...
Страница 264: ...CHAPTER 8 Spanning Tree Algorithm Configuring Interface Settings for MSTP 264...
Страница 274: ...CHAPTER 9 Congestion Control Automatic Traffic Control 274...
Страница 288: ...CHAPTER 10 Class of Service Layer 3 4 Priority Settings 288...
Страница 304: ...CHAPTER 11 Quality of Service Attaching a Policy Map to a Port 304...
Страница 423: ...CHAPTER 13 Security Measures DHCP Snooping 423 Figure 229 Displaying the Binding Table for DHCP Snooping...
Страница 424: ...CHAPTER 13 Security Measures DHCP Snooping 424...
Страница 568: ...CHAPTER 14 Basic Administration Protocols OAM Configuration 568...
Страница 596: ...CHAPTER 15 IP Configuration Setting the Switch s IP Address IP Version 6 596...
Страница 614: ...CHAPTER 1 IP Services Configuring the PPPoE Intermediate Agent 614...
Страница 784: ...CHAPTER 20 System Management Commands Powered Device 784...
Страница 814: ...CHAPTER 22 Remote Monitoring Commands 814...
Страница 1008: ...CHAPTER 26 Interface Commands Power Savings 1008...
Страница 1022: ...CHAPTER 27 Link Aggregation Commands Trunk Status Display Commands 1022...
Страница 1052: ...CHAPTER 29 Congestion Control Commands Automatic Traffic Control Commands 1052...
Страница 1064: ...CHAPTER 31 UniDirectional Link Detection Commands 1064...
Страница 1070: ...CHAPTER 32 Address Table Commands 1070...
Страница 1130: ...CHAPTER 34 ERPS Commands 1130...
Страница 1172: ...CHAPTER 35 VLAN Commands Configuring Voice VLANs 1172...
Страница 1186: ...CHAPTER 36 Class of Service Commands Priority Commands Layer 3 and 4 1186...
Страница 1302: ...CHAPTER 38 Multicast Filtering Commands MVR for IPv6 1302...
Страница 1368: ...CHAPTER 40 CFM Commands Delay Measure Operations 1368...
Страница 1390: ...CHAPTER 42 Domain Name Service Commands 1390...
Страница 1448: ...CHAPTER 44 IP Interface Commands ND Snooping 1448...
Страница 1450: ...SECTION IV Appendices 1450...
Страница 1455: ...APPENDIX A Software Specifications Management Information Bases 1455 UDP MIB RFC 2013...
Страница 1456: ...APPENDIX A Software Specifications Management Information Bases 1456...
Страница 1464: ...APPENDIX D Compliances and Safety Statements CE Mark Declaration of Conformance for EMI and Safety EEC 1464...
Страница 1482: ...COMMAND LIST 1482...
Страница 1493: ......
Страница 1494: ...ECS3510 10PD E032014 ST R03 149100000179A...