dhcp-users Digest, Vol 133, Issue 6

[Cayab, Jefrey E.]

Charles,

Thank you for the suggestion which I did and the warning messages went away.
Unfortunately, this server serves large events wherein wifi users could get
up to 60,000

Here's the log messages when I applied the changes:
[root at dhcp ~]# tail -f /var/log/messages
Nov 12 00:06:52 dhcp systemd: Stopping DHCPv4 Server Daemon...
Nov 12 00:06:52 dhcp systemd: Stopped DHCPv4 Server Daemon.
Nov 12 00:06:52 dhcp systemd: Starting DHCPv4 Server Daemon...
Nov 12 00:06:52 dhcp dhcpd: Internet Systems Consortium DHCP Server 4.2.5
Nov 12 00:06:52 dhcp dhcpd: Copyright 2004-2013 Internet Systems Consortium.
Nov 12 00:06:52 dhcp dhcpd: All rights reserved.
Nov 12 00:06:52 dhcp dhcpd: For info, please visit
https://www.isc.org/software/dhcp/
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
Nov 12 00:07:08 dhcp dhcpd: Internet Systems Consortium DHCP Server 4.2.5
Nov 12 00:07:08 dhcp dhcpd: Copyright 2004-2013 Internet Systems Consortium.
Nov 12 00:07:08 dhcp dhcpd: All rights reserved.
Nov 12 00:07:08 dhcp dhcpd: For info, please visit
https://www.isc.org/software/dhcp/
Nov 12 00:13:10 dhcp dhcpd: Wrote 0 class decls to leases file.
Nov 12 00:13:10 dhcp dhcpd: Wrote 0 deleted host decls to leases file.
Nov 12 00:13:10 dhcp dhcpd: Wrote 0 new dynamic host decls to leases file.
Nov 12 00:13:11 dhcp dhcpd: Wrote 77733 leases to leases file.
Nov 12 00:13:11 dhcp dhcpd: Listening on LPF/eth0/50:6b:8d:03:a8:b9/
10.16.5.0/24
Nov 12 00:13:11 dhcp dhcpd: Sending on   LPF/eth0/50:6b:8d:03:a8:b9/
10.16.5.0/24
Nov 12 00:13:11 dhcp dhcpd: Sending on   Socket/fallback/fallback-net
Nov 12 00:13:11 dhcp systemd: Started DHCPv4 Server Daemon.

Still 7 minutes :(


On Mon, Nov 11, 2019 at 9:40 PM <dhcp-users-request at lists.isc.org> wrote:

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>    1. Re: [EXT] Re: dhcp-users Digest, Vol 133, Issue 4
>       (Anderson, Charles R)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Mon, 11 Nov 2019 13:40:13 +0000
> From: "Anderson, Charles R" <cra at wpi.edu>
> To: Users of ISC DHCP <dhcp-users at lists.isc.org>
> Subject: Re: [EXT] Re: dhcp-users Digest, Vol 133, Issue 4
> Message-ID: <20191111134010.e3a3vxw57x2iqnn3 at angus.ind.wpi.edu>
> Content-Type: text/plain; charset="us-ascii"
>
> On Mon, Nov 11, 2019 at 08:26:27PM +0800, Cayab, Jefrey E. wrote:
> > Hi,
> >
> > # No service will be given on this subnet, but declaring it helps the
> > # DHCP server to understand the network topology.
> >
> > subnet 0.0.0.0 netmask 0.0.0.0 {
> > }
> >
> > It was taken from the comment above it; I thought I could just put
> anything
> > - I'd appreciate if someone can give me what's the proper Subnet/Netmask
> to
> > put there. Does the comment above means that if my dhcp server is in
> > 10.16.5.0/24 - this is the subnet and netmask I need to put there?
>
> Yes.  Your subnet statements must reflect reality and yes you do need a
> subnet for your dhcp server local interface.
>
> 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?
>
>
>
>
> Move these group and host statements to global scope (not inside any
> subnet).
>
>
> ------------------------------
>
> Subject: Digest Footer
>
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> ------------------------------
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> End of dhcp-users Digest, Vol 133, Issue 6
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