By design, DHCP renewals start to occur when the assigned lease time is half over.
This is
determined by the DHCP server. You would have to hack your DHCP client to change this.
The easiest "fix" would be for SWBell to assign you a permanent IP number. If you'rw
connected all
the time anyway, this shouldn't be a problem IMHO.
Windows 9x DHCP clients wont have these problems as their DHCP client software is
broken and
will ignore the server's attempts to get them to change their address under many
conditions.
I still find Windows boxes on my network that don't have some changes that I put on
the DHCP
server over two years ago!
> Running Redhat 6.0 on a firewall with IPCHAINS/MASQ to share a DSL
> connection. Has worked perfect for months on end until recently.
>
> For the past several weeks I've had problems with the DSL connection
> regularly freezing even though the DSL modem shows a connection and
> there have no problems showing up in the Linux log files.
>
> I've spent considerable time with SWBell's DSL tech people (who
> naturally don't directly support Linux, though they are trying to be
> helpful.)
>
> At first, I thought my firewall machine had gone south, but a
> replacement machine that is newer and faster suffers the same problem.
> Replacing NIC's in both machines did not help.
>
> The most likely theory at this point is that SWBell is failing to
> renew my DHCP lease when my machine requests it. They are supposed to
> call me back but I haven't heard anything yet.
>
> Question 1: my understanding is that DHCP addresses generally have a 3
> day lease. However, my machine is asking to renew the lease every 2 or
> 3 hours, which causes a freeze. Is there a way to slow the frequency
> that my machine asks for a lease renewal?
>
> Question 2: is anyone aware of any changes at SWBell in the past two
> months that would cause this problem? My machine connects perfectly
> everytime from a cold boot. My modem lights indicate it is not the
> problem. It appears to be a lease renewal issue. Is this a bad DHCP
> server at their end or something in a script I need to edit at my end?
>
> Comments appreciated!
>
>
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