Re: DHCP Manual Bindings

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
>> >> > B B  network 10.1.1.0 255.255.255.0
>> >> > B B  default-router 10.1.1.2
>> >> > !
>> >> > ip dhcp pool R1
>> >> > B B  host 10.1.1.1 255.255.255.0
>> >> > B B  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 B B B Marko and Tyson are absolutely correct here.
>> >> >> >> >
>> >> >> >> > B B B 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
>> >> >> >> >>
>> >> >> >> >>
>> >> >> >> >>
>> >> >> >> >>
>> >> >> >> >> _______________________________________________________________________
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>> >> >> >> >>
>> >> >> >> >>
>> >> >> >> >>
>> >> >> >> >>
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>> >> >> >> >
>> >> >> >> >
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>> >> >> >> >
>> >> >> >> >
>> >> >> >> >
>> >> >> >> >
>> >> >> >> > _______________________________________________________________________
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>> >> >> >> >
>> >> >> >> > _______________________________________________________________________
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