Re: no DHCP offer

ISP told me it could be someone clone client mac address
the workaround is to change the mac-address
i did what they told and it works

any explanation ?

On Thu, Jan 28, 2010 at 12:12 AM, Tyson Scott <tscott_at_ipexpert.com> wrote:

> Many ISP's use some type of Port Security feature to prevent you from
> plugging in different devices.
>
> Either reboot the cable modem or change the MAC on your PC to mimic the
> last
> device plugged in... Vuala it will work for you.
>
> If that is not the case then contact the ISP. Possibly it is configured for
> static, thus no DHCP.
>
> Regards,
>
> Tyson Scott - CCIE #13513 R&S, Security, and SP
> Technical Instructor - IPexpert, Inc.
> Mailto: tscott_at_ipexpert.com
> Telephone: +1.810.326.1444, ext. 208
> Live Assistance, Please visit: www.ipexpert.com/chat
> eFax: +1.810.454.0130
>
>
>
> -----Original Message-----
> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
> Sadiq Yakasai
> Sent: Wednesday, January 27, 2010 11:53 AM
> To: ospfv2
> Cc: Cisco certification
> Subject: Re: no DHCP offer
>
> ip helpper address?
>
> On Wed, Jan 27, 2010 at 4:28 PM, ospfv2 <ospfv2_at_gmail.com> wrote:
>
> > Hi Experts
> >
> > when using cable modem, client (winXP pro) doesn't get ip address from
> DHCP
> > server.
> > using wireshark i see no DHCP offer from ISP site. client did send DHCP
> > discover.
> >
> > i believe the problem is on ISP site, i just don't know how to prove it.
> > client succesfully get ip from other DHCP servers.
> >
> > i wonder why there is no DHCP offer ?
> >
> > Rgds
> >
> >
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> >
>
>
> --
> CCIE #19963
>
>
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Received on Fri Jan 29 2010 - 22:51:44 ART