I am currently using this command on many routers ranging in ios from 10.2
(yeah I know but its a couple a hundred miles away) to 12.2. Without it
our customers (we are an ISP) cannot reach the DHCP servers. It must work
outside of the dialup only arena.
At 01:09 PM 9/26/2001, khramov wrote:
>Priscilla,
> I think that you are right about the ip dhcp-server command. I looked it
>up on Cisco's web site. It seems
>that it can be used only with dial up to tell the client where dhcp server
>is.
>
>Priscilla Oppenheimer wrote:
>
> > Yes, I finally found that also, but only in reference to dial-up networks
> > where the router is acting as an access sever for SLIP/PPP clients. Does
it
> > work elsewhere? It would be good if it did.
> >
> > Priscilla
> >
> > At 02:24 PM 9/26/01, [EMAIL PROTECTED] wrote:
> >
> > >Their must be more than one way to foreword DHCP requests.
> > >
> >
> >http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121cgcr/d
> ial_r/drdreip.htm#xtocid1564817>
> > >
> > >
> > >Tom got me looking into this earlier.
> > >
> > >-Eric
> > >
> > >-----Original Message-----
> > >From: Priscilla Oppenheimer
> > >[mailto:[EMAIL PROTECTED]]
> > >Sent: Wednesday, September 26, 2001 2:05 PM
> > >To: [EMAIL PROTECTED]
> > >Subject: Re: DHCP [7:21051]
> > >
> > >At 01:06 PM 9/26/01, khramov wrote:
> > > > From my understanding ip dhcp-server command will enable upd
broadcast
> > > > on ports 66 and 67. Is that true?
> > >
> > >It causes your router to BE a DHCP server and to accept and process
> > >broadcasts to UDP port 67 and to send responses from port 66. It does
not
> > >cause the router to forward UDP broadcasts to port 67.
> > >
> > >If you turn your router into a DHCP server, you would also have to
>identify
> > >an external File Transport Protocol (FTP), Trivial File Transfer
Protocol
> > >(TFTP), or remote copy protocol (rcp) server that you will use to store
>the
> > >DHCP bindings database. The router will access that database. Here's
more
> > >info on turning your router into a DHCP server, which is often not a
good
> > >idea, in my opinion (because it detracts from the router's real jobs):
> > >
> >
> >http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/f
> ipr_c/ipcprt1/1cfdhcp.htm
> > >
> > >
> > >Priscilla
> > >
> > > >Alex
> > > >
> > > >
> > > >Priscilla Oppenheimer wrote:
> > > >>Why do you want to turn your router into a DHCP server? I thought you
> > > >>already had a DHCP server. You just need a helper address and
> > > >>
> > > >>ip forward-protocol udp 67
> > > >>no ip forward-protocol 137
> > > >>no ip forward-protocol 138
> > > >>
> > > >>The last two commands are because you said that NetBIOS broadcast
> > > >>forwarding was causing problems for your NT server. When you have a
> > helper
> > > >>address, the router forwards a bunch of UDP packets. You have to
> > configure
> > > >>it to be more discerning.
> > > >>
> > > >>Priscilla
> > > >>
> > > >>At 09:24 AM 9/26/01, khramov wrote:
> > > >> >Hello,
> > > >> > ip dhcp-server works, I didn't specify it with a hyphen. So
> > > >> would you
> > > >> >agree
> > > >> > that the best solution for me would be to disable ip directed
> > > >> >broadcast, ip
> > > >> > helper address and enable ip dhcp-server at the global
config?
> > If
> > >I
> > > >> >enable ip
> > > >> > dhcp-server do I need to enable ip forward-protocol udp
(ports
> > > >> 66 and
> > > >> >67)?
> > > >> >
> > > >> > Thanks a lot,
> > > >> > Alex
> > > >> >
> > > >> >MADMAN wrote:
> > > >> >
> > > >> > > Hmm.. I haven't done it in a while so I tried it on a 7507 with
> > > >> RSP8's and
> > > >> > > an MSFC2,
> > > >> > > they both accepted the command just fine but are not in the
> > > >> config. So I
> > > >> > > figured they
> > > >> > > must be enabled by default so I did a no ip forward protocol udp
>67
> > >and
> > > >> > > wallah, there it
> > > >> > > is!!!
> > > >> > >
> > > >> > > C7507MIX#conf t
> > > >> > > Enter configuration commands, one per line. End with CNTL/Z.
> > > >> > > C7507MIX(config)#no ip for
> > > >> > > C7507MIX(config)#no ip forward-protocol udp 67
> > > >> > > C7507MIX(config)#^Z
> > > >> > > C7507MIX#wr t
> > > >> > > Building configuration...ip kerberos source-interface any
> > > >> > > ip classless
> > > >> > > no ip forward-protocol udp bootps
> > > >> > >
> > > >> > > Dave
> > > >> > >
> > > >> > > khramov wrote:
> > > >> > >
> > > >> > > > I did that, but when I do sh run it is not showing up in
config
> > > >> file. I
> > > >> > > > mean (ip
> > > >> > > > forward-protocol udp 67).
> > > >> > > > Is that the way it is suppose to be?
> > > >> > > >
> > > >> > > > MADMAN wrote:
> > > >> > > >
> > > >> > > > > Check "ip foward protocol"
> > > >> > > > >
> > > >> > > > > Dave
> > > >> > > > >
> > > >> > > > > khramov wrote:
> > > >> > > > > >
> > > >> > > > > > Hello
> > > >> > > > > > How do I enable broadcast for DHCP server? I know
that
> > ip
> > > >> > > > > > helper enables UDP broadcast, but broadcast of
netbios
> > > >> > > > > > services causes some problems for win nt server. So
I
> > >guess
> > > >> > > > > > to be more specific what can I do to forward udp
> > > >> broadcast on
> > > >> > > > > > ports 67 and 68 only?
> > > >> > > > > >
> > > >> > > > > > And another question that I have what exactly ip
> > > >> > > > > > directed-broadcast command does? I've searched
Cisco's
> > > web
> > > >> > > > > > site but I never came across a clear defenition?
> > > >> > > > > >
> > > >> > > > > > Thanks,
> > > >> > > > > > Alex
> > > >> > > > > >
> > > >> > > > > > [GroupStudy.com removed an attachment of type text/x-vcard
> > > >> which had
> > > >> >a
> > > >> > > > name
> > > >> > > > > > of khramov.vcf]
> > > >> > > > > --
> > > >> > > > > David Madland
> > > >> > > > > Sr. Network Engineer
> > > >> > > > > CCIE# 2016
> > > >> > > > > Qwest Communications Int. Inc.
> > > >> > > > > [EMAIL PROTECTED]
> > > >> > > > > 612-664-3367
> > > >> > > > >
> > > >> > > > > "Emotion should reflect reason not guide it"
> > > >> > > >
> > > >> > > > [GroupStudy.com removed an attachment of type text/x-vcard
which
> > > >> had a
> > > >> >name
> > > >> > > > of khramov.vcf]
> > > >> > > --
> > > >> > > David Madland
> > > >> > > CCIE# 2016
> > > >> > > Senior Network Engineer
> > > >> > > Qwest Communications
> > > >> > > 612-664-3367
> > > >> >
> > > >> >[GroupStudy.com removed an attachment of type text/x-vcard which
had
>a
> > > >> name
> > > >> >of khramov.vcf]
> > > >> groupstudy.com/form/read.php?f=7&i=21133&t=21051
> > > >> >--------------------------------------------------
> > > >> >FAQ, list archives, and subscription info:
> > > >> >http://www.groupstudy.com/lis
> > > >> t/cisco.html
> > > >> >Report misconduct and Nondisclosure violations to
>[EMAIL PROTECTED]
> > > >>
> > > >>________________________
> > > >>
> > > >>Priscilla Oppenheimer
> > > >>http://www.priscilla.com
> > >
> > >________________________
> > >
> > >Priscilla Oppenheimer
> > >http://www.priscilla.com
> > ________________________
> >
> > Priscilla Oppenheimer
> > http://www.priscilla.com
>
>[GroupStudy.com removed an attachment of type text/x-vcard which had a name
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