From: Ivan (ivan@iip.net)
Date: Fri Feb 09 2007 - 09:12:47 ART
Sorry for duplicate link information. I don't see this mail still.
On Friday 09 February 2007 14:42, Maxim Kurushkin wrote:
> Hi, Stefan.
> Use Cisco and yuor braine. :-)
> There are many very good documents on Cisco site.
> I think that you are looking something like this:
> "Understanding and Troubleshooting DHCP in Catalyst Switch or Enterprise
> Networks"
> http://cisco.com/en/US/tech/tk648/tk361/technologies_tech_note09186a00800f0
>804.shtml
>
> WBR,
> Maxim
>
> Stefan Grey wrote:
> > Well it would be great if you could also provide me with details on this.
> >
> > It seems me quite illogical what you have written here. Why the client
> > sets the source mac to 0?? It really does know it's own address.
> >
> >> Server Responce (suppose they directly connected):
> >> SRC MAC: me
> >> DST MAC: FFFFFFFF
> >> SRC IP: me
> >> DST IP: local broadcast
> >
> > If the server responds in this way than any host would receive this
> > packet and think that it is for them..... Another thing which I am not
> > sure here is that I have heared that in DHCP offer message the DHCP
> > server sets the IP address of destination the same IP address which it
> > wants to assign to the client.
> >
> > Any thoughts??
> >
> >> From: Ivan <ivan@iip.net>
> >> To: "Stefan Grey" <examplebrain@hotmail.com>
> >> Subject: Re: DHCP question
> >> Date: Fri, 9 Feb 2007 12:57:24 +0300
> >>
> >> As you wrote you didn't want detail. I try explain as briefly as i can.
> >>
> >> Client Request
> >> SRC MAC: 0:0:0
> >> DST MAC: FFFFFFFF
> >> SRC IP: 0
> >> DST IP: General broadcast
> >>
> >> Server Responce (suppose they directly connected):
> >> SRC MAC: me
> >> DST MAC: FFFFFFFF
> >> SRC IP: me
> >> DST IP: local broadcast
> >>
> >> On Friday 09 February 2007 12:23, Stefan Grey wrote:
> >> > Hello guys,
> >> >
> >> > Could you please explain me the following?? Which addresses (MAC
> >>
> >> and IP) do
> >>
> >> > the host and the DHCP server use in the process of communication.
> >> > Could you please confirm and expain the following thigs??
> >> > Do I correctly understand that the hosts sends the DHCP request with
> >> > destination FF:FF:FF:FF MAC and destination IP 255.255.255.255 to
> >>
> >> the local
> >>
> >> > network?? It uses its MAC as the source... which IP address does it
> >>
> >> use as
> >>
> >> > the source?? And then the DHCP address answers in unicast as I
> >>
> >> remember
> >>
> >> > with its IP and MAC as the source and the MAC of the hosts as the MAC
> >> > destination... which IP it uses as the destination IP address??
> >> >
> >> > The question appeared because I can't understand how two layer 7
> >>
> >> devices
> >>
> >> > can communicate without know the IP address exactly. How do they
> >>
> >> overcome
> >>
> >> > here this problem. I did a short research on this but the documents
> >>
> >> didn't
> >>
> >> > give me the details.
> >> > Thank you very much.
> >> > Please help...
> >> >
> >> > Regards,
> >> >
> >> > Stefan.
> >> >
> >> > _________________________________________________________________
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> >>
> >> --
> >> Ivan
> >
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-- Ivan
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