Re: DHCP Manual Bindings

From: Jose Orfao <jmorfao_at_gmail.com>
Date: Wed, 17 Nov 2010 21:20:08 +0200

Yes,

http://www.cisco.com/en/US/docs/ios/ipaddr/configuration/guide/iad_dhcp_svr_cfg_ps6350_TSD_Products_Configuration_Guide_Chapter.html#wp1117978

under configuring manual bindings.

many thanks

On Wed, Nov 17, 2010 at 9:16 PM, Marko Milivojevic <markom_at_ipexpert.com>wrote:

> Right-on. Perhaps that's why, since IOS devices and almost every OS I
> worked with do. Nicely done. You have a reference for that, perhaps?
>
> --
> Marko Milivojevic - CCIE #18427
> Senior Technical Instructor - IPexpert
>
> FREE CCIE training: http://bit.ly/vLecture
>
> Mailto: markom_at_ipexpert.com
> Telephone: +1.810.326.1444
> Web: http://www.ipexpert.com/
>
> On Wed, Nov 17, 2010 at 19:13, Jose Orfao <jmorfao_at_gmail.com> wrote:
> > Hi
> >
> > Just read it up, the hardware address only works for clients that do not
> > send a client identifier in the packet.
> >
> > Thanks
> >
> >
> > On Wed, Nov 17, 2010 at 9:09 PM, Marko Milivojevic <markom_at_ipexpert.com>
> > wrote:
> >>
> >> I know how, but I didn't want to sound like a smartypants ;-). You
> >> were trying to assign 1st address - which will be assigned 1st from
> >> the pool anyway.
> >>
> >> So... the question stands - what does hardware-address do, if
> >> anything? Not to mention it has options to specify media type. None of
> >> that ever worked for me...
> >>
> >> --
> >> Marko Milivojevic - CCIE #18427
> >> Senior Technical Instructor - IPexpert
> >>
> >> FREE CCIE training: http://bit.ly/vLecture
> >>
> >> Mailto: markom_at_ipexpert.com
> >> Telephone: +1.810.326.1444
> >> Web: http://www.ipexpert.com/
> >>
> >> On Wed, Nov 17, 2010 at 19:00, Jose Orfao <jmorfao_at_gmail.com> wrote:
> >> > Hi Marko
> >> >
> >> > Apologies, just tried it again, and it got an IP from the pool and not
> >> > the
> >> > reserved one.
> >> > Not sure how I thought it was working awhile ago.
> >> >
> >> > But I know that we should be using the client-ID.
> >> >
> >> > Thanks
> >> >
> >> > Jose
> >> >
> >> > On Wed, Nov 17, 2010 at 8:16 PM, Marko Milivojevic <
> markom_at_ipexpert.com>
> >> > wrote:
> >> >>
> >> >> I would prefer this to continue on the mailing list...
> >> >>
> >> >> That has *never* worked for me.
> >> >>
> >> >> --
> >> >> Marko Milivojevic - CCIE #18427
> >> >> Senior Technical Instructor - IPexpert
> >> >>
> >> >> FREE CCIE training: http://bit.ly/vLecture
> >> >>
> >> >> Mailto: markom_at_ipexpert.com
> >> >> Telephone: +1.810.326.1444
> >> >> Web: http://www.ipexpert.com/
> >> >>
> >> >> On Wed, Nov 17, 2010 at 18:14, Jose Orfao <jmorfao_at_gmail.com> wrote:
> >> >> > Yes thats is correct, maybe I explained incorrectly.
> >> >> > eg.
> >> >> >
> >> >> > !
> >> >> > ip dhcp pool TEST
> >> >> > network 10.1.1.0 255.255.255.0
> >> >> > default-router 10.1.1.2
> >> >> > !
> >> >> > ip dhcp pool R1
> >> >> > host 10.1.1.1 255.255.255.0
> >> >> > hardware-address c20b.0fa8.0000
> >> >> > !
> >> >> >
> >> >> > thanks
> >> >> >
> >> >> >
> >> >> > On Wed, Nov 17, 2010 at 8:11 PM, Marko Milivojevic
> >> >> > <markom_at_ipexpert.com>
> >> >> > wrote:
> >> >> >>
> >> >> >> I was referring to the specific command "hardware-address" :-)
> >> >> >>
> >> >> >> --
> >> >> >> Marko Milivojevic - CCIE #18427
> >> >> >> Senior Technical Instructor - IPexpert
> >> >> >>
> >> >> >> FREE CCIE training: http://bit.ly/vLecture
> >> >> >>
> >> >> >> Mailto: markom_at_ipexpert.com
> >> >> >> Telephone: +1.810.326.1444
> >> >> >> Web: http://www.ipexpert.com/
> >> >> >>
> >> >> >> On Wed, Nov 17, 2010 at 18:08, Jose Orfao <jmorfao_at_gmail.com>
> wrote:
> >> >> >> > Hi Marko
> >> >> >> >
> >> >> >> > It does work have used it before it preparing for lab (in a
> >> >> >> > seperate
> >> >> >> > pool),
> >> >> >> > the client-id I get it from the client router running a debug
> dhcp
> >> >> >> > detail
> >> >> >> > which gives me the id that consists of "null cisco mac fa0/0"
> >> >> >> > ;also
> >> >> >> > works.
> >> >> >> > thanks.
> >> >> >> >
> >> >> >> > Jose Orfao
> >> >> >> >
> >> >> >> >
> >> >> >> > On Wed, Nov 17, 2010 at 7:58 PM, Marko Milivojevic
> >> >> >> > <markom_at_ipexpert.com>
> >> >> >> > wrote:
> >> >> >> >>
> >> >> >> >> Absolutely correct. Running "debug ip dhcp server events" on
> the
> >> >> >> >> server will answer all doubts as to what the client identifier
> >> >> >> >> value
> >> >> >> >> you are dealing with.
> >> >> >> >>
> >> >> >> >> That said... I have one DHCP question. Does anyone know a
> >> >> >> >> scenario/situation when using "hardware-address" inside host
> pool
> >> >> >> >> actually does anything?
> >> >> >> >>
> >> >> >> >> --
> >> >> >> >> Marko Milivojevic - CCIE #18427
> >> >> >> >> Senior Technical Instructor - IPexpert
> >> >> >> >>
> >> >> >> >> FREE CCIE training: http://bit.ly/vLecture
> >> >> >> >>
> >> >> >> >> Mailto: markom_at_ipexpert.com
> >> >> >> >> Telephone: +1.810.326.1444
> >> >> >> >> Web: http://www.ipexpert.com/
> >> >> >> >>
> >> >> >> >> On Wed, Nov 17, 2010 at 17:29, Adel Abouchaev
> >> >> >> >> <adel_at_netmasterclass.net>
> >> >> >> >> wrote:
> >> >> >> >> > B B B B Marko and Tyson are absolutely correct here.
> >> >> >> >> >
> >> >> >> >> > B B B B To add a bit to the message on how to approach
> this
> >> >> >> >> > situation
> >> >> >> >> > if you aren't sure why client ID or any other parameters
> aren't
> >> >> >> >> > leading to a
> >> >> >> >> > correct DHCP assignment, the debug for DHCP is quite
> talkative
> >> >> >> >> > and
> >> >> >> >> > usually
> >> >> >> >> > answers any question within a minute. I have found it very
> >> >> >> >> > useful
> >> >> >> >> > during
> >> >> >> >> > troubleshooting DHCP issues for many occasions.
> >> >> >> >> >
> >> >> >> >> > Cheers,
> >> >> >> >> >
> >> >> >> >> > Adel Abouchaev, CCIE# 12037, CISSP, MCSE
> >> >> >> >> >
> >> >> >> >> > Technical Support Engineer
> >> >> >> >> > Netmasterclass LLC, Cisco Learning Partner
> >> >> >> >> > RFC821: adel_at_netmasterclass.net
> >> >> >> >> > E.164: +18886772669
> >> >> >> >> > HTTP: www.netmasterclass.net
> >> >> >> >> >
> >> >> >> >> >
> >> >> >> >> >
> >> >> >> >> > -----Original Message-----
> >> >> >> >> > From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com]
> On
> >> >> >> >> > Behalf
> >> >> >> >> > Of
> >> >> >> >> > Marko Milivojevic
> >> >> >> >> > Sent: Wednesday, November 17, 2010 8:10 AM
> >> >> >> >> > To: Tyson Scott
> >> >> >> >> > Cc: Steven Blasiol; Cisco certification
> >> >> >> >> > Subject: Re: DHCP Manual Bindings
> >> >> >> >> >
> >> >> >> >> > Just to follow-up on Tyson's reply. This will probably work
> if
> >> >> >> >> > you
> >> >> >> >> > set
> >> >> >> >> > "ip address dhcl client-identifier Fa0/0" on R1. If not,
> after
> >> >> >> >> > certain
> >> >> >> >> > IOS release (12.4somethingortheother) client identifier
> option
> >> >> >> >> > is
> >> >> >> >> > set
> >> >> >> >> > to something else (see previous discussion on OSL for
> details).
> >> >> >> >> >
> >> >> >> >> > When you set the client-identifier option to be derived from
> >> >> >> >> > the
> >> >> >> >> > interface MAC address, it will still not be the MAC address
> >> >> >> >> > alone.
> >> >> >> >> > The
> >> >> >> >> > MAC address will be prefixed by media type, which for
> Ethernet
> >> >> >> >> > is
> >> >> >> >> > "01.
> >> >> >> >> > Therefore, your client-id becomes 01<MAC_ADDRESS>". You need
> to
> >> >> >> >> > move
> >> >> >> >> > the dot around a bit.
> >> >> >> >> >
> >> >> >> >> > For MAC address c002.0594.0000, client identifier becomes
> >> >> >> >> > 01c0.0205.9400.00 -> just as Tyson wrote below.
> >> >> >> >> >
> >> >> >> >> > --
> >> >> >> >> > Marko Milivojevic - CCIE #18427
> >> >> >> >> > Senior Technical Instructor - IPexpert
> >> >> >> >> >
> >> >> >> >> > FREE CCIE training: http://bit.ly/vLecture
> >> >> >> >> >
> >> >> >> >> > Mailto: markom_at_ipexpert.com
> >> >> >> >> > Telephone: +1.810.326.1444
> >> >> >> >> > Web: http://www.ipexpert.com/
> >> >> >> >> >
> >> >> >> >> > On Wed, Nov 17, 2010 at 00:22, Tyson Scott
> >> >> >> >> > <tscott_at_ipexpert.com>
> >> >> >> >> > wrote:
> >> >> >> >> >> That is because that will never be your client-identifier.
> >> >> >> >> >>
> >> >> >> >> >> ip dhcp pool LABMANUAL
> >> >> >> >> >> B B host 10.0.12.77 255.255.255.0
> >> >> >> >> >> B B client-identifier 01c0.0205.9400.00
> >> >> >> >> >>
> >> >> >> >> >> When you get the IP address you should be able to notice in
> >> >> >> >> >> the
> >> >> >> >> >> output
> >> >> >> >> >> of
> >> >> >> >> >> "show ip dhcp bind" what the client identifier is showing up
> >> >> >> >> >> for
> >> >> >> >> >> when
> >> >> >> >> >> it
> >> >> >> >> >> isn't working for you.
> >> >> >> >> >>
> >> >> >> >> >> Please let me know if this doesn't work for you. B If it
> >> >> >> >> >> doesn't
> >> >> >> >> >> work
> >> >> >> >> >> please
> >> >> >> >> >> provide the output of "show ip dhcp bind"
> >> >> >> >> >>
> >> >> >> >> >> Regards,
> >> >> >> >> >>
> >> >> >> >> >> Tyson Scott - CCIE #13513 R&S, Security, and SP
> >> >> >> >> >> Managing Partner / Sr. Instructor - IPexpert, Inc.
> >> >> >> >> >> Mailto: tscott_at_ipexpert.com
> >> >> >> >> >>
> >> >> >> >> >>
> >> >> >> >> >> -----Original Message-----
> >> >> >> >> >> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com]
> On
> >> >> >> >> >> Behalf
> >> >> >> >> >> Of
> >> >> >> >> >> Steven Blasiol
> >> >> >> >> >> Sent: Tuesday, November 16, 2010 7:10 PM
> >> >> >> >> >> To: Cisco certification
> >> >> >> >> >> Subject: DHCP Manual Bindings
> >> >> >> >> >>
> >> >> >> >> >> I am having some problems in GNS3 setting manual ip address
> >> >> >> >> >> bindings. B
> >> >> >> >> >> Here
> >> >> >> >> >> are the relevant configs:
> >> >> >> >> >>
> >> >> >> >> >> (DHCP Client)R1 Fa0/0-------------------Fa0/0R2 (DHCP
> Server)
> >> >> >> >> >>
> >> >> >> >> >> Router1
> >> >> >> >> >>
> >> >> >> >> >> interface FastEthernet0/0
> >> >> >> >> >> ip address dhcp client-id FastEthernet0/0 hostname CCIELAB
> >> >> >> >> >> duplex auto
> >> >> >> >> >> speed auto
> >> >> >> >> >>
> >> >> >> >> >>
> >> >> >> >> >> Router2
> >> >> >> >> >>
> >> >> >> >> >> no ip dhcp conflict logging
> >> >> >> >> >> !
> >> >> >> >> >> ip dhcp excluded-address 10.0.12.1 10.0.12.50
> >> >> >> >> >> !
> >> >> >> >> >> ip dhcp pool LABMANUAL
> >> >> >> >> >> B B host 10.0.12.77 255.255.255.0
> >> >> >> >> >> B B client-identifier c002.0594.0000 (MAC of R1 Fa0/0)
> >> >> >> >> >> B B client-name CCIELAB
> >> >> >> >> >> !
> >> >> >> >> >> ip dhcp pool LABDYNAMIC
> >> >> >> >> >> B B network 10.0.12.0 255.255.255.0
> >> >> >> >> >> B B domain-name ccie.com
> >> >> >> >> >> B B default-router 10.0.12.1
> >> >> >> >> >>
> >> >> >> >> >>
> >> >> >> >> >> When I have it configured like this I keep getting an
> address
> >> >> >> >> >> from
> >> >> >> >> >> the
> >> >> >> >> >> LABDYNAMIC pool. B I thought maybe you could have two pools
> so
> >> >> >> >> >> I
> >> >> >> >> >> removed the
> >> >> >> >> >> DYNAMIC pool and I just don't get an address.
> >> >> >> >> >>
> >> >> >> >> >> i am obviously missing something and the documentation i
> have
> >> >> >> >> >> found
> >> >> >> >> >> so
> >> >> >> >> >> far
> >> >> >> >> >> is not really helpful.
> >> >> >> >> >>
> >> >> >> >> >> Thanks in advance.
> >> >> >> >> >> --
> >> >> >> >> >> Steven M. Blasiol
> >> >> >> >> >>
> >> >> >> >> >>
> >> >> >> >> >> Blogs and organic groups at http://www.ccie.net
> >> >> >> >> >>
> >> >> >> >> >>
> >> >> >> >> >>
> >> >> >> >> >>
> >> >> >> >> >>
> _______________________________________________________________________
> >> >> >> >> >> Subscription information may be found at:
> >> >> >> >> >> http://www.groupstudy.com/list/CCIELab.html
> >> >> >> >> >>
> >> >> >> >> >>
> >> >> >> >> >> Blogs and organic groups at http://www.ccie.net
> >> >> >> >> >>
> >> >> >> >> >>
> >> >> >> >> >>
> >> >> >> >> >>
> >> >> >> >> >>
> _______________________________________________________________________
> >> >> >> >> >> Subscription information may be found at:
> >> >> >> >> >> http://www.groupstudy.com/list/CCIELab.html
> >> >> >> >> >
> >> >> >> >> >
> >> >> >> >> > Blogs and organic groups at http://www.ccie.net
> >> >> >> >> >
> >> >> >> >> >
> >> >> >> >> >
> >> >> >> >> >
> >> >> >> >> >
> _______________________________________________________________________
> >> >> >> >> > Subscription information may be found at:
> >> >> >> >> > http://www.groupstudy.com/list/CCIELab.html
> >> >> >> >> >
> >> >> >> >> >
> >> >> >> >> > Blogs and organic groups at http://www.ccie.net
> >> >> >> >> >
> >> >> >> >> >
> >> >> >> >> >
> >> >> >> >> >
> >> >> >> >> >
> _______________________________________________________________________
> >> >> >> >> > Subscription information may be found at:
> >> >> >> >> > http://www.groupstudy.com/list/CCIELab.html
> >> >> >> >>
> >> >> >> >>
> >> >> >> >> Blogs and organic groups at http://www.ccie.net
> >> >> >> >>
> >> >> >> >>
> >> >> >> >>
> >> >> >> >>
> _______________________________________________________________________
> >> >> >> >> Subscription information may be found at:
> >> >> >> >> http://www.groupstudy.com/list/CCIELab.html

Blogs and organic groups at http://www.ccie.net
Received on Wed Nov 17 2010 - 21:20:08 ART

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