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Is it normal for an XP computer to use bootp to request it's IP? From the capture it appears the client only talks to the gateway and not direct to the DHCP server. The address in question is a manual DHCP that would be dished out for this client. So I see a DHCP request, 2 DHCP ACKs from the gateway and 3 G-ARPs from the client.

asked 20 Jan '11, 07:55

networkguy09's gravatar image

networkguy09
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accept rate: 0%


The gateway can also forward DHCP request to a remote dhcp server. This is sometimes known as a dhcp helper or dhcp relay. So basically, the gateway can convert packets/frames containing UDP sent to 255.255.255.255/FF:FF:FF:FF:FF:FF to a destination address assigned by the network administrator. In this case, there is a a "giaddr" field in the dhcp header that allows the router to record information so the dhcp server can respond with an appropriate address.

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answered 20 Jan '11, 16:43

Paul%20Stewart's gravatar image

Paul Stewart
3018
accept rate: 6%

Yes, that's normal. Very ofter the 'gateway' acts as DHCP server as well.

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answered 20 Jan '11, 12:27

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Jaap ♦
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accept rate: 14%

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question asked: 20 Jan '11, 07:55

question was seen: 6,087 times

last updated: 20 Jan '11, 16:43

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