2-3
DHCP requests is 1.1.1.130/25, the DHCP server will select IP addresses for clients from the 1.1.1.0/24
address pool.
Keep the IP addresses for dynamic allocation within the subnet where the interface of the DHCP server
or DHCP relay agent resides to avoid wrong IP address allocation.
IP Address Allocation Sequence
A DHCP server assigns an IP address to a client according to the following sequence:
1) The first assignable IP address found in the extended address pool referenced on the receiving
interface
2) The IP address manually bound to the client’s MAC address or ID
3) The IP address that was ever assigned to the client
4) The IP address designated by the Option 50 field in a DHCP-DISCOVER message
5) The first assignable IP address found in a proper common address pool
6) The IP address that was a conflict or passed its lease duration
If no IP address is assignable, the server does not respond.
Option 50 is the requested IP address field in DHCP-DISCOVER messages. It is padded by the client to
specify the IP address that the client wants to obtain. The contents to be padded depend on the client.
DHCP Server Configuration Task List
Complete the following tasks to configure the DHCP server:
Task
Remarks
Configuring an Address Pool for the DHCP Server
Required
Enabling DHCP
Required
Enabling the DHCP Server on an Interface
Required
Applying an Extended Address Pool on an Interface
Required by the extended address pool
configuration
When configuring a common address pool,
ignore this task.
Configuring the DHCP Server Security Functions
Optional
Configuring the Handling Mode for Option 82
Optional
Содержание 4500G PWR 24-Port
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Страница 252: ...1 7 Clearing ARP entries from the ARP table may cause communication failures ...
Страница 362: ...i Table of Contents 1 Dual Stack Configuration 1 1 Dual Stack Overview 1 1 Configuring Dual Stack 1 1 ...
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Страница 786: ...1 16 3 In the case of PIM SM use the display current configuration command to check the BSR and RP information ...
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Страница 1443: ...i Table of Contents 1 URPF Configuration 1 1 URPF Overview 1 1 What is URPF 1 1 How URPF Works 1 1 Configuring URPF 1 2 ...
Страница 1720: ...ii Single Device Upgrade 3 4 IRF System Upgrade 3 5 ...