Event ID: 1020 Source: DhcpServer

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Event ID: 1020 Source: DhcpServer

Source: DhcpServer

Type: Warning

Description:
Scope 192.168.1.0 is 81 percent utilized with only 11 IP addresses remaining.

English: Request a translation of the event description in plain English.

Concepts to understand:
What is DHCP?
What is a DHCP Lease?

Comments:
Pavel Dzemyantsau
As per Microsoft: "Internet Protocol (IP) addresses are leased by the Dynamic Host Configuration Protocol (DHCP) server to its clients. Each lease has an expiration date, which the client must renew if it is going to continue to use that IP address. The DHCP server cannot issue leases to clients if the number of available IP addresses in the scope is insufficient". See T726940 for more information.
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EventID.Net
See "JSI Tip 2987" and MSW2KDB to find out why this event occurs.
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Peter Rufener
In my case, I had to expand the existing scope range from 192.168.1.100 - 192.168.1.199 to 192.168.1.100 - 192.168.1.220. After restarting the DHCP server, the database had been cleared and showed the correct actualized values.
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Greg Fastabend
A client server reported 25 addresses in use and 1 free on the statistics pane, but only 4 items in Active Leases. Refreshing did not change the listing. After restarting the DHCP Server service and then refreshing the window, all the other leases appeared and were deleted. This stopped the events and corrected the statistics.
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EventID.Net
Message triggered by the DHCP server when the number of available IP addresses within the specified scope is reaching a certain level. See ME165006 and ME261964 for more details.
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Links: ME165006, ME261964, JSI Tip 2987, T726940, MSW2KDB

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