Date: Tue, 6 Aug 2013 11:05:04 +0200 From: Andreas Nilsson <andrnils@gmail.com> To: Olivier Nicole <olivier.nicole@cs.ait.ac.th> Cc: Olivier Nicole <on@cs.ait.ac.th>, FreeBSD Net <freebsd-net@freebsd.org>, s m <sam.gh1986@gmail.com> Subject: Re: how define network with mask 8 for dhcp server? Message-ID: <CAPS9%2BSsm2VpDdu4bj33SJbpmZha74BLMmGZJVubAmDBf6eripw@mail.gmail.com> In-Reply-To: <CAPS9%2BSuEd=az9HkJZfHv%2B4A=Nk-ZS1AzRH7FaoOOtugUr19mFw@mail.gmail.com> References: <CAA_1SgERG9jQE8vApcv0GYsBhvpf9FYFW2Pw0rqGT%2B9FjP2ktQ@mail.gmail.com> <u9zjsv9rwc.fsf@banyan.cs.ait.ac.th> <CAA_1SgGR0XGPb2pCb0CaNB5xjUdubSynLOnFvzTVJGUroMyEzQ@mail.gmail.com> <CA%2Bg%2BBvgekEcdD=d8MG883ze02gnofTCV2wL7LA3gWXHSbMAUzQ@mail.gmail.com> <CAPS9%2BSuEd=az9HkJZfHv%2B4A=Nk-ZS1AzRH7FaoOOtugUr19mFw@mail.gmail.com>
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On Tue, Aug 6, 2013 at 10:59 AM, Andreas Nilsson <andrnils@gmail.com> wrote: > > > > On Tue, Aug 6, 2013 at 10:40 AM, Olivier Nicole < > olivier.nicole@cs.ait.ac.th> wrote: > >> Sam, >> >> > my problem is to know how define a network with mask 8 and dhcp server >> > works correctly with it! you know if i config my dhcpd.conf like below, >> i >> > have core dump either: >> > subnet 10.0.0.0 netmask 255.0.0.0 >> > { >> > range 10.0.0.1 10.255.255.254; >> > } >> > >> > do you know how should i define my range ?? >> >> The reason may be that 2^24 machines in a subnet is such a non-sense >> that dhcp simply cannot manage it. >> >> Best regards, >> >> Olivier >> >> > >> > On Tue, Aug 6, 2013 at 12:23 PM, Olivier Nicole < >> Olivier.Nicole@cs.ait.ac.th >> >> wrote: >> > >> >> Sam, >> >> >> >> > subnet 192.0.0.0 netmask 255.0.0.0 >> >> >> >> I know it is not the answer to your question, but you are wrong in your >> >> guess that 192.0.0.0/8 is all private IPs. Only 192.168.0.0/16 is. >> >> >> >> I know that for certain because my own IP starts with 192. >> >> >> >> If you want a full /8 private, you can only use 10.0.0.0/8 >> >> >> >> Bets regards, >> >> >> >> Olivier >> >> >> >> -- >> >> >> >> > Well, I would guess it may run out of memory... I did a few tests: > 192.0.0.0 - 192.128.255.255 does work ( using ~2.5Gb RAM ). > 192.0.0.0 - 192.192.255.255 does work ( using ~4Gb RAM ). > 192.0.0.0 - 192.200.255.255 does work ( using ~4.2Gb RAM ). > 192.0.0.0 - 192.224.255.255 dumps core > > Why would you want to have such a huge range? > > Best regards > Andreas > Also, a quick look at the core file gives same indications: #0 0x0000000800c67a21 in _malloc_prefork () from /lib/libc.so.7 #1 0x0000000800c6b72a in malloc () from /lib/libc.so.7 #2 0x000000000047b43b in omapi_object_dereference () #3 0x00000000004844db in do_ip4_hash () #4 0x0000000000484571 in do_ip4_hash () #5 0x0000000000438a45 in pool_timer () #6 0x000000000041dcd7 in trace_conf_stop () #7 0x000000000041fc4e in trace_conf_stop () #8 0x0000000000420698 in trace_conf_stop () #9 0x0000000000420ecc in trace_conf_stop () #10 0x0000000000420197 in trace_conf_stop () #11 0x00000000004247f3 in trace_conf_stop () #12 0x000000000041f210 in trace_conf_stop () #13 0x000000000040f3bf in lease_pinged () #14 0x000000000040d451 in ?? () #15 0x00000008007d7000 in ?? () #16 0x0000000000000000 in ?? () Best regards Andreas
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