<div dir="ltr"><div>Charles,</div><div><br></div><div>Thank you for the suggestion which I did and the warning messages went away.</div><div>Unfortunately, this server serves large events wherein wifi users could get up to 60,000</div><div><br></div><div>Here's the log messages when I applied the changes:</div><div>[root@dhcp ~]# tail -f /var/log/messages<br>Nov 12 00:06:52 dhcp systemd: Stopping DHCPv4 Server Daemon...<br>Nov 12 00:06:52 dhcp systemd: Stopped DHCPv4 Server Daemon.<br>Nov 12 00:06:52 dhcp systemd: Starting DHCPv4 Server Daemon...<br>Nov 12 00:06:52 dhcp dhcpd: Internet Systems Consortium DHCP Server 4.2.5<br>Nov 12 00:06:52 dhcp dhcpd: Copyright 2004-2013 Internet Systems Consortium.<br>Nov 12 00:06:52 dhcp dhcpd: All rights reserved.<br>Nov 12 00:06:52 dhcp dhcpd: For info, please visit <a href="https://www.isc.org/software/dhcp/">https://www.isc.org/software/dhcp/</a><br>Nov 12 00:07:08 dhcp dhcpd: Not searching LDAP since ldap-server, ldap-port and ldap-base-dn were not specified in the config file<br>Nov 12 00:07:08 dhcp dhcpd: Internet Systems Consortium DHCP Server 4.2.5<br>Nov 12 00:07:08 dhcp dhcpd: Copyright 2004-2013 Internet Systems Consortium.<br>Nov 12 00:07:08 dhcp dhcpd: All rights reserved.<br>Nov 12 00:07:08 dhcp dhcpd: For info, please visit <a href="https://www.isc.org/software/dhcp/">https://www.isc.org/software/dhcp/</a><br>Nov 12 00:13:10 dhcp dhcpd: Wrote 0 class decls to leases file.<br>Nov 12 00:13:10 dhcp dhcpd: Wrote 0 deleted host decls to leases file.<br>Nov 12 00:13:10 dhcp dhcpd: Wrote 0 new dynamic host decls to leases file.<br>Nov 12 00:13:11 dhcp dhcpd: Wrote 77733 leases to leases file.<br>Nov 12 00:13:11 dhcp dhcpd: Listening on LPF/eth0/50:6b:8d:03:a8:b9/<a href="http://10.16.5.0/24">10.16.5.0/24</a><br>Nov 12 00:13:11 dhcp dhcpd: Sending on LPF/eth0/50:6b:8d:03:a8:b9/<a href="http://10.16.5.0/24">10.16.5.0/24</a><br>Nov 12 00:13:11 dhcp dhcpd: Sending on Socket/fallback/fallback-net<br>Nov 12 00:13:11 dhcp systemd: Started DHCPv4 Server Daemon.</div><div><br></div><div>Still 7 minutes :(</div><div><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Nov 11, 2019 at 9:40 PM <<a href="mailto:dhcp-users-request@lists.isc.org">dhcp-users-request@lists.isc.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Send dhcp-users mailing list submissions to<br>
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1. Re: [EXT] Re: dhcp-users Digest, Vol 133, Issue 4<br>
(Anderson, Charles R)<br>
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Message: 1<br>
Date: Mon, 11 Nov 2019 13:40:13 +0000<br>
From: "Anderson, Charles R" <<a href="mailto:cra@wpi.edu" target="_blank">cra@wpi.edu</a>><br>
To: Users of ISC DHCP <<a href="mailto:dhcp-users@lists.isc.org" target="_blank">dhcp-users@lists.isc.org</a>><br>
Subject: Re: [EXT] Re: dhcp-users Digest, Vol 133, Issue 4<br>
Message-ID: <<a href="mailto:20191111134010.e3a3vxw57x2iqnn3@angus.ind.wpi.edu" target="_blank">20191111134010.e3a3vxw57x2iqnn3@angus.ind.wpi.edu</a>><br>
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On Mon, Nov 11, 2019 at 08:26:27PM +0800, Cayab, Jefrey E. wrote:<br>
> Hi,<br>
> <br>
> # No service will be given on this subnet, but declaring it helps the<br>
> # DHCP server to understand the network topology.<br>
> <br>
> subnet 0.0.0.0 netmask 0.0.0.0 {<br>
> }<br>
> <br>
> It was taken from the comment above it; I thought I could just put anything<br>
> - I'd appreciate if someone can give me what's the proper Subnet/Netmask to<br>
> put there. Does the comment above means that if my dhcp server is in<br>
> <a href="http://10.16.5.0/24" rel="noreferrer" target="_blank">10.16.5.0/24</a> - this is the subnet and netmask I need to put there?<br>
<br>
Yes. Your subnet statements must reflect reality and yes you do need a subnet for your dhcp server local interface.<br>
<br>
The long loading time is because you have a HUGE number of IPs in ranges. Added up, you have about 656,000 IP addresses the server has to keep track of. Do you really need each subnet to handle 65534 dynamic IPs?<br>
<br>
<br><br>
<br>
Move these group and host statements to global scope (not inside any subnet).<br>
<br>
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End of dhcp-users Digest, Vol 133, Issue 6<br>
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</blockquote></div></div>