BÀI 3 XÂY DỰNG DHCP SERVER (BỘ MÔN TRIỂN KHAI ỨNG DỤNG MẠNG)

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
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

(9!"%%&&%;?@AB%09
(9!"%%&&%;?@AB%09
1

1
&9"9"&!"%%&%?CCAB%09
&9"9"&!"%%&%?CCAB%09
2
2
(9!"%%&&%BADEA;%09
(9!"%%&&%BADEA;%09
3
3
;9"9"F!"%%&&%8G%09
;9"9"F!"%%&&%8G%09
4
4




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;9"9"F
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;9"9"H

;9"9"H
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
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DHCP Client
DHCP Client
DHCP
Server1
DHCP
Server1
DHCP
Server2
DHCP
Server2
DHCP Client sends a DHCPREQUEST packet
DHCP Client sends a DHCPREQUEST packet
1
1
DHCP Server1 sends a DHCPACK packet
DHCP Server1 sends a DHCPACK packet
2
2
50% of lease
duration has
expired
50% of lease
duration has
expired

87.5% of lease
duration has
expired
87.5% of lease
duration has
expired
100% of lease
duration has
expired
100% of lease
duration has
expired
If the client fails to renew its lease, after 50% of the
lease duration has expired, then the DHCP lease
renewal process will begin again after 87.5% of the
lease duration has expired
If the client fails to renew its lease, after 50% of the
lease duration has expired, then the DHCP lease
renewal process will begin again after 87.5% of the
lease duration has expired
If the client fails to renew it’s lease, after 87.5% of the
lease has expired, then the DHCP lease generation
process starts over again with a DHCP client
broadcasting a DHCPDISCOVER
If the client fails to renew it’s lease, after 87.5% of the
lease has expired, then the DHCP lease generation
process starts over again with a DHCP client
broadcasting a DHCPDISCOVER

(9
(9
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;9"9"H

;9"9"H
(9&9&%BADEA;%09
(9&9&%BADEA;%09
1
1
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2
2
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9L"9
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
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UVWO4O#X%8&"%"&
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