Ian,
This illustrates a "beef" with STN - if I want to change the driver it
uses (or daemon) for a particular service - I have no idea how to do it
(here in STN). In a RH environment - I'd simply download the
latest-and-greatest xxx.o for the NIC, (usually from their site!), or a
shiny new dhcpd.....
(Side question: Does anyone know what kind of "service" daemons and
"drivers" get used? This way I could do something like get the
latest-and-greatest 3c509 or eepro drivers, etc.)
I'd be interested in knowing how to use TCPDUMP.
I heard (on a Wintel site) that (supposedly) the older Linux DHCP
clients sent out BOOTP requests instead of true DHCP requests. (and many
routers, switches, etc. are not normally configured to pass BOOTP
packets.) I do not know if that is true - but it would kinda make
sense.
Jim
Ian McDermid wrote:
> I have an @Home service from CWO in Australia and I do not have any
> problems getting a DHCP lease. However, during install I used TCPDUMP on
> the STN box to assist in the troubleshooting. @Home uses the Machine ID
> for DHCP lease/renewal.
>
> 'Linux' had major problems with DHCP as it used PUMP rather that DHCPCD
> for IP Lease. I could not get pump to work reliably with PUMP.
> Downloading and compiling the latest version of DHCPCD fixed all the
> problems. I can do multiple releases and renewals from both STN and
> Linux using the IFDOWN/UP scripts without any problems.
>
> As to the differences between Linux/STN and Windows, the only difference
> is in the parameters that each system sends to the DHCP server. I assume
> that your provider allocates leases based on the Host Name so there
> should be no difference. It is also possible to send the OS type as a
> parameter, but Windows is not able to do this.
>
> I hope this helps
>
>
>
> -----Original Message-----
> From: Jim Harris [SMTP:[EMAIL PROTECTED]]
> Sent: Saturday, January 13, 2001 1:03 PM
> To: [EMAIL PROTECTED]
> Subject: [STN] "Linux" DHCP vs "M$" DHCP???
>
> I have noticed something interesting - this is not exactly a STN
> question - but as it affects STN users, I am tossing it out here on the
> table.....
>
> I have noticed - on several different occasions (not just STN), that in
> a DHCP environment - Microsoft DHCP often works better and faster than
> the Linux counterpart - and I don't know why.
>
> When I try to get a DHCP lease from my cable provider - (using win98 /
> winipcfg) I can do release/renew cycles - and get a lease almost
> immediately. I can do a release - wait a while - do a renew, and get
> the lease in nanoseconds. During initial boot - Windows negotiates and
> obtains a lease without difficulties.
>
> Doing the same thing with STN - it boggs down. This is true to the
> point that I cannot guarantee that STN will get a lease when it boots.
> In fact, it is virtually guaranteed NOT to get one the first time out.
> (I have to wait for it to start complaining, and reboot - at that point
> there is about a 65 to 75% chance it will get a lease. If it fails the
> second time and I reboot again - it is 98%+ guaranteed to get a lease
> the third time.)
>
> I know that this is -NOT- a STN problem - as I have seen this in
> "closed" networks for people I have worked for - where the Wintel boxes
> would get a lease instantly - and the Linux boxes would wither on the
> vine. (we ended up getting them static IP's) I suspect that this is a
> generic "linux" issue. (at least with RH 5.n+ - I have not tried this
> yet with 7.0)
>
> I am curious as to what is so different between "wintel" DHCP and
> "Linux" DHCP?
>
> I do -not- know what kind of DHCP provider my cable company has - but I
> do know that their machine is running Apache - which makes me believe
> that it is probably a Unix box.
>
> If I had a network sniffer - I could chase this down, but since I don't.
>
> . . .
>
> Anyone have any ideas why???
>
> Setup:
> Latest and Greatest STN (reg version)
> External network card is a 3Com 3905b-tpo (this card usually has no
> difficulties getting DHCP, as opposed to the 390x, which has nothing but
>
> troubles. . .)
> Cable modem is a Motorola Surfboard SB4100
> Cable provider is Charter Communications.
>
> I am not providing any DNS or DHCP on the internal side.
>
> I am requesting DHCP services on the external side.
>
> My STN box is also configured to dual-boot to Win98 2nd Ed. using the
> same hardware in the same configuration.
>
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