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.netReceived on Wed Nov 17 2010 - 17:58:38 ART
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