DHCP Server not sending offers!

[Eugène Ngontang]

Thank you so much Glenn.

I will give you a feedback in a while.

With regards,
Eugène NG.
Le 19 juil. 2014 08:07, "Glenn Satchell" <glenn.satchell at uniq.com.au> a
écrit :

> Hi Eugene
>
> You are correct. The dynamic range is not used for hosts assigned an
> address via a fixed-address statement. But different people are offering
> ideas for you.
>
> The "range dynamic-bootp" assigns bootp leases to clients. The difference
> between bootp and dhcp is defined in several RFCs, but for our purpose we
> can think of dhcp as an enhanced bootp. One of the noticeable differences
> is that a bootp lease does not expire, so it is easy to run out of IPs if
> you have too many clients, even over a long timne. Eg the PC you got rid
> of two years ago is still holding one of your IPs. The isc-dhcp server
> handles both types of leases in the same way, with a flag to distinguish
> bootp from dhcp. It uses the same leases file. "range dynamic-bootp" was
> an example in the example dhcpd.conf distributed by RedHat, so that's
> probably where it came from.
>
> I see that you are running dhcpd version 3.0.5. this is a very old
> version, released in 2006. This was the default version with RedHat 5. If
> you upgrade to RedHat 6.x you get version 4.1_something. There have been
> many versions and fixes in the last 8 years. The next step before looking
> at problems with your setup would be to upgrade to a current version and
> see if you still see the problem. This is probably going to be the easiest
> path. Your current dhcpd.conf looks like it would work without change.
>
> This is from the Release Notes (RELNOTES) in a newer version:
>
>                         Changes since 3.0.5
>
> - Assorted fixes for broken network devices:  Packet length is now
>   determined from the IP header length field to finally calculate the
>   UDP payload length, because some NIC drivers return more data than
>   they actually received.
>
> regards,
> -glenn
>
> On Sat, July 19, 2014 12:07 am, Eugène Ngontang wrote:
> > But Maarten, the dynamic range is for host whose ip address is not
> > reserved. So if there nerver is a host requesting for a dynamic address,
> > will there be a dynamic lease too? where do bootp store its leases? Is it
> > in the same dhcpd.leases file?
> >
> > Thanks.
> >
> >
> > 2014-07-18 15:48 GMT+02:00 Eugène Ngontang <sympavali at gmail.com>:
> >
> >> Ok Maarten, I will look at this.
> >>
> >> In fact I'm not the one who set the "range dynamic-bootp" clausure, I
> >> guess the clients are using dhcp and bootp is not really required.
> >>
> >> But please, I know bootp is an old protocol, but I din't know the impact
> >> of using this clausure. I would like if possible to have a link where
> >> the
> >> difference between the two clausures is explained, and the impact of
> >> using
> >> "range dynamic-bootp" in lease offers.
> >>
> >> I will try investigating this way. Thanks.
> >>
> >> Regards,
> >> Eugène NG
> >>
> >>
> >> 2014-07-18 14:36 GMT+02:00 Maarten Carels <lists at carels.info>:
> >>
> >>> On 18 Jul 2014, at 14:22 , Eugène Ngontang <sympavali at gmail.com>
> >>> wrote:
> >>>
> >>> > @Maarten, that is what I didn't figure out.
> >>> >
> >>> > Nevertheless, I have a dynamic range, and fixed addresses.
> >>> >
> >>> > Please explain in more detail what you mean in your post about bootp.
> >>> Thank you my dear.
> >>>
> >>> If all your clients are using dhcp, change the range statement to
> >>>     range 1.1.1.50 1.1.1.100;
> >>>
> >>> bootp is an old protocol that lacks the automatic lease expiration.
> >>>
> >>> And look at the place where the server is logging, usually somewhere in
> >>> /var/log. If it thinks it can't give a lease, it will log why.
> >>>
> >>> --maarten
> >>>
> >>> _______________________________________________
> >>> dhcp-users mailing list
> >>> dhcp-users at lists.isc.org
> >>> https://lists.isc.org/mailman/listinfo/dhcp-users
> >>>
> >>
> >>
> >>
> >> --
> >> ngonta_e at epitech.net
> >> sympavali at gmail.com
> >> ------------------------------------------------------------
> >> *Aux hommes il faut un chef, et au*
> >>
> >> * chef il faut des hommes! L'habit ne fait pas le moine, mais lorsqu'on
> >> te
> >> voit on te juge!*
> >>
> >
> >
> >
> > --
> > ngonta_e at epitech.net
> > sympavali at gmail.com
> > ------------------------------------------------------------
> > *Aux hommes il faut un chef, et au*
> >
> > * chef il faut des hommes!L'habit ne fait pas le moine, mais lorsqu'on te
> > voit on te juge!*
> > _______________________________________________
> > dhcp-users mailing list
> > dhcp-users at lists.isc.org
> > https://lists.isc.org/mailman/listinfo/dhcp-users
>
>
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