Avaya Configuring SNMP, BOOTP, DHCP, and RARP Services Uživatelský manuál Strana 89
- Strana / 108
- Tabulka s obsahem
- KNIHY
Hodnocené. / 5. Na základě hodnocení zákazníků
Configuring DHCP Services
3-5
• If the target server cannot supply the requested configuration parameters,
it sends a DHCPNAK packet to the client through the BOOTP relay
agent.
When the client receives the DHCPNAK packet, it broadcasts a new
DHCPDISCOVER packet and the process begins again.
A client may choose to relinquish its IP address before the lease period
expires by sending a DHCPRELEASE packet to the server. A
DHCPRELEASE packet contains the relinquished IP address in the client IP
address field and the client’s MAC address in the client hardware address
field.
Acquiring the Same IP Address Again
A client may want to reuse an IP address that a server allocated earlier by DHCP
or any other method. In this case, the interchange between client and server omits
some of the steps described in the previous section, and proceeds as follows:
1. The client starts the interchange by broadcasting a DHCPREQUEST packet
that contains its previous IP address in the client IP address field.
2. The BOOTP relay agent forwards the packet to DHCP servers on other
networks.
3. DHCP servers examine the client’s configuration parameters in the options
field of the DHCPREQUEST packet.
4. The server that originally supplied the configuration parameters recognizes
them and responds with a DHCPACK packet.
5. When a client receives a DHCPACK packet, it accepts or declines the
parameters, as it would when receiving a new IP address.
If a client’s request is invalid (for example, if the client has moved to a new
network), servers respond with a DHCPNAK packet. If a client receives only
DHCPNAK packets, it must request a new IP address by broadcasting a
DHCPDISCOVER packet.
- Configuring SNMP, BOOTP 1
- DHCP, and RARP Services 1
- Bay Networks Software License 3
- (continued) 4
- Contents 5
- About This Guide 13
- Audience 14
- CompuServe 15
- How to Get Help 16
- Conventions 16
- Acronyms 18
- Chapter 1 19
- Configuring SNMP Services 19
- The RMON Groups 21
- Ethernet Statistics Group 22
- History Control Group 22
- Ethernet History Group 22
- Host Group 22
- HostTopN Group 22
- Matrix Group 23
- Filter Group 23
- Packet Capture Group 23
- SNMP Implementation Notes 24
- Threshold Example 25
- Event Message Format 26
- State of a Threshold 26
- Memory Considerations 27
- RMON Interoperability Issues 28
- RMON Memory Use 28
- Statistics Group 29
- History Group 30
- Filter and Capture Groups 33
- Enabling SNMP Services 34
- To enable IP on an interface: 35
- Click on OK 35
- Configuring SNMP Services 37
- Accessing SNMP Parameters 38
- 40
- Adding an SNMP Community 42
- 44
- Adding a Manager 45
- Editing a Manager 47
- 48
- Editing Threshold Parameters 49
- Configuring a Threshold 51
- 53
- 55
- 56
- 57
- Editing Trap Parameters 58
- Configuring Exceptions 59
- Click on Add 60
- Edit the parameters 60
- Click on OK 60
- Deleting Exceptions 62
- Chapter 2 63
- Configuring BOOTP Services 63
- Configuring BOOTP Services 65
- Implementation Notes 67
- Specifying BOOTP Servers 68
- Using Traffic Filters 68
- Enabling BOOTP Services 69
- Accessing BOOTP Parameters 70
- 73
- 4. Click on OK 79
- Deleting BOOTP Globally 84
- Chapter 3 85
- Configuring DHCP Services 85
- Configuring DHCP Services 87
- Enabling DHCP Services 90
- Deleting DHCP Globally 92
- Chapter 4 93
- Configuring RARP Services 93
- Enabling RARP Services 94
- Accessing RARP Parameters 95
- Disabling RARP Globally 99
- Deleting RARP Globally 100
- Appendix A 101
- Default Parameter Settings 101
- BOOTP and DHCP Parameters 103
- RARP Parameters 104
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