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Home > Archive > 70-210 > August 2001 > Lease a car ... Oh I mean Lease IP
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Lease a car ... Oh I mean Lease IP
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| ITman 2001-08-17, 10:02 am |
| Hello
Im reading a book talking about how DHCP deal with the lease IP for the client.
I understand the DHCPdiscover,offer,request and pack phase. After about 50% of the lease time expire, the client will request for renew.
what happen if the DHCP refuse ?
Under what condition a HDCP serever will refuse the renew ?
And if the DHCP refuse for the renewal,after
the client received the DHCPNACK message and it will need to request a new IP, So at this point the IP will no longer being use, and is that why many of us always got kicked out from the ISP cuz the IP we were using already passed the time limit and the ISP's
DHCP refuse for the renew ? | |
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| After about 50% of the lease time expire, the client will request for renew.
what happen if the DHCP refuse ?
Basically, if the 50% lease time request is Nak'd and the DHCP client is unable to communicate with the DHCP server from which it obtained its lease, and 87.5% of its lease time has expired, it will attempt to contact any available DHCP server by broadcasting DHCPRequest messages. Any DHCP server can respond with a DHCPAck message, renewing the lease, or a DHCPNak message, forcing the DHCP client to initialize and restart the lease process.
Check out this link from the DHCP section of the online version of the Microsoft Windows 2000 Resource Kit
http://www.microsoft.com/windows200...cb_dhc_aepp.htm
click the left & right arrows in the upper right hand side of the screen navigate through the DHCP section.
Or if you'd like to read up on some more technical info on Windows 2000 in general check this link
http://www.microsoft.com/windows200.../en/default.asp
HTH. | |
| firechicken 2001-08-17, 12:57 pm |
| Great links, Spid! Thanx!
quote:
is that why many of us always got kicked out from the ISP cuz the IP we were using already passed the time limit and the ISP's DHCP refuse for the renew ?
Not likely. Usually ISP's will boot a client for things like inactivity, or policy. For example, the last ISP I worked at tossed the dial-up people after three hours, whether they were active or not.
Keep in mind, most ISP's offer unlimited access, which does not mean unlimited online time. Okay, I'm babbling now...HTH. |
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