Avaya Configuring SNMP, BOOTP, DHCP, and RARP Services Manual de usuario Pagina 57
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- Tabla de contenidos
- MARCADORES
Valorado. / 5. Basado en revisión del cliente
SNMP, BootP, BootP/DHCP Relay, DHCP Server, and RARP Concepts
117362-C Rev 00
2-27
2.
The router configured as a DHCP server examines the packet, and if its IP
address differs from the value in the server IP address
field, it reclaims the IP
addresses it supplied in the DHCPOFFER packets. This address is now
available for other clients.
3.
If the DHCPREQUEST packet is valid, the DHCP server forwards the request
information to the NetID Server Manager.
4.
After the NetID Server Manager updates the NetID database with the new
request information, the NetID Server Manager sends a committed update
message back to the DHCP server.
Accepting or Declining IP Information
In a network configuration in which the router is configured as a DHCP server, the
target server recognizes its IP address in the server IP address field, and responds
to the DHCPREQUEST packet as follows:
• If the DHCP server can supply the requested configuration parameters, it
sends a DHCPACK packet to the client through the DHCP server.
The client examines the configuration parameters in the DHCPACK packet
and records the duration of the lease period. If the client detects a problem
with the configuration parameters, it sends a DHCPDECLINE packet to the
server and issues a new DHCPDISCOVER packet. Otherwise, the client
accepts the configuration parameters.
• If the target server cannot supply the requested configuration parameters, it
sends a DHCPNAK packet to the client through DHCP server.
When the client receives the DHCPNAK packet, it broadcasts a new
DHCPDISCOVER packet and the process begins again.
Acquiring the Same IP Address Again
A client may want to reuse an IP address that a server allocated earlier by DHCP.
In this case, the interchange between client and server omits some of the steps
described in the previous section.
- Configuring SNMP 1
- BootP, DHCP, and RARP 1
- Services 1
- Trademarks 2
- Restricted Rights Legend 2
- Statement of Conditions 2
- Contents 5
- 117362-C Rev 00 10
- Before You Begin 15
- Text Conventions 16
- Acronyms 17
- How to Get Help 18
- Chapter 1 19
- Starting SNMP, BootP 19
- DHCP, and RARP Services 19
- Starting Configuration Tools 20
- Using the BCC 21
- Starting SNMP Services 22
- Using Site Manager 23
- Starting BootP Services 24
- Starting BootP/DHCP Relay 26
- Starting a DHCP Server 27
- Starting RARP Services 29
- Chapter 2 31
- SNMP Messages 32
- SNMP Communities 33
- SNMP Implementation Notes 34
- Table 2-1. Severity Levels 35
- Thresholds 37
- Threshold Example 38
- BootP Relay Agent Overview 40
- DHCP Overview 44
- Dynamic IP Address Allocation 45
- DHCP Components 46
- DHCP Server Implementation 48
- IP network 49
- RARP Overview 59
- Chapter 3 61
- Customizing SNMP 61
- Disabling and Reenabling SNMP 63
- Specifying a Lock Address 66
- Adding SNMP Communities 69
- Deleting an SNMP Community 72
- Adding a Manager 73
- Deleting a Manager 77
- Specifying a Trap Entity 79
- Disabling a Trap Entity 82
- Configuring Trap Exceptions 83
- Deleting Trap Exceptions 85
- Configuring Thresholds 86
- Adding a Threshold 88
- Specifying Threshold Units 91
- Chapter 4 97
- (continued) 100
- Customizing BootP 101
- (continued) 106
- Deleting BootP Globally 114
- Customizing BootP/DHCP Relay 115
- Chapter 5 115
- BootP Relay Agent 116
- Defining DHCP Servers 117
- Chapter 6 121
- Customizing the DHCP Server 121
- Specifying the Debug Level 128
- Deleting DHCP Globally 130
- Chapter 7 131
- Customizing RARP 131
- Customizing RARP Parameters 132
- Disabling RARP Globally 135
- Deleting RARP Globally 135
- Appendix A 137
- SNMP, BootP, DHCP, and RARP 137
- Parameter Descriptions 137
- Caution: 138
- SNMP Global Parameters 139
- SNMP Community Parameters 141
- SNMP Manager Parameters 142
- BootP and DHCP Parameters 152
- BootP Address Parameters 154
- DHCP Global Parameters 160
- RARP Interface Parameters 164
- RARP Address Parameters 164
- Appendix B 167
- Default Parameter Settings 167
- RARP Parameters 171
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