IP address lease extension···································································································································· 29
DHCP message format··················································································································································· 30
DHCP options ································································································································································· 31
Overview································································································································································ 31
Introduction to DHCP options······························································································································· 31
Custom options ······················································································································································ 31
Protocols and standards ················································································································································ 34
DHCP server configuration ········································································································································35
Introduction to DHCP server·········································································································································· 35
Application environment······································································································································· 35
DHCP address pool··············································································································································· 35
IP address allocation sequence···························································································································· 36
Configuration task list ··········································································································································· 37
Creating a DHCP address pool ··························································································································· 38
Enabling DHCP ······························································································································································ 45
Configuration prerequisites ·································································································································· 47
Enabling client offline detection ··································································································································· 48
Enabling handling of Option 82 ·································································································································· 48
Configuration prerequisites ·································································································································· 49
Configuration procedure ······································································································································ 49
DHCP relay agent configuration ·······························································································································55
Introduction to DHCP relay agent ································································································································ 55
Application environment······································································································································· 55
Fundamentals ························································································································································· 55
Enabling DHCP ······························································································································································ 57
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