Re: DHCP problems

2005-10-18 Thread Brian McEwen 


On Oct 18, 2005, at 9:15 AM, Steve Fuller wrote:

I use locations for that. I have one with a static IP for work, one  
with a static IP for home (same one if I'm using wireless or  
wired), and then one with DHCP assigned to wireless or wired that I  
use when I'm on the road. Not that there's anything wrong with  
using DHCP at home, but I thought I'd toss this out as a way around  
using DHCP everywhere.


I used to use Locations but under 9.1, sometimes there would be a bad  
bug which would really eat my system.  I've not got back into it since.


B


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Re: DHCP problems

2005-10-18 Thread Sean Winn 

On Tue, 18 Oct 2005, Steve Fuller wrote:

sorry, I haven't been following the entire thread. What about assigning 
IP addresses instead of DHCP? All you would have to do is give each 
computer a valid IP on the same subnet.




Because it's an ongoing pain in the butt if you have ANY coming and going 
of systems...




For laptops that move between two or more sites with different address 
ranges it is so much easier to use DHCP.  Especially if you are using WiFi 
sites on the run.


Personally,

I use locations for that. I have one with a static IP for work, one with a 
static IP for home (same one if I'm using wireless or wired), and then one 
with DHCP assigned to wireless or wired that I use when I'm on the road. Not 
that there's anything wrong with using DHCP at home, but I thought I'd toss 
this out as a way around using DHCP everywhere.


Steve Fuller




A better solution if its available is static mappings on the DHCP server -
that way there's absolutely no conflicts ever and the IP can be used with
NAT pass through if need be.

However, static mappings on SOHO routers can be spotty - some don't support
it, others support it in odd ways.

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Re: DHCP problems

2005-10-18 Thread Steve Fuller 
sorry, I haven't been following the entire thread. What about  
assigning IP addresses instead of DHCP? All you would have to do  
is give each computer a valid IP on the same subnet.




Because it's an ongoing pain in the butt if you have ANY coming  
and going of systems...




For laptops that move between two or more sites with different  
address ranges it is so much easier to use DHCP.  Especially if you  
are using WiFi sites on the run.


Personally,

I use locations for that. I have one with a static IP for work, one  
with a static IP for home (same one if I'm using wireless or wired),  
and then one with DHCP assigned to wireless or wired that I use when  
I'm on the road. Not that there's anything wrong with using DHCP at  
home, but I thought I'd toss this out as a way around using DHCP  
everywhere.


Steve Fuller

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Re: DHCP problems

2005-10-17 Thread Clark Martin 

At 12:51 PM -0700 10/17/05, Bruce Johnson wrote:

On Oct 17, 2005, at 11:38 AM, Mike Kauspedas wrote:



sorry, I haven't been following the entire thread. What about 
assigning IP addresses instead of DHCP? All you would have to do is 
give each computer a valid IP on the same subnet.


Because it's an ongoing pain in the butt if you have ANY coming and 
going of systems...


For laptops that move between two or more sites with different 
address ranges it is so much easier to use DHCP.  Especially if you 
are using WiFi sites on the run.

--
Clark Martin
Redwood City, CA, USA
Macintosh / Internet Consulting

"I'm a designated driver on the Information Super Highway"

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Re: DHCP problems

2005-10-17 Thread Bruce Johnson 


On Oct 17, 2005, at 11:38 AM, Mike Kauspedas wrote:


I had that happen to the router/firewall we use on our home network -
before I did anything, I called tech support who confirmed what I
wanted to do:  held in the reset button for about 30 sec. to reset  
the

router.  Since the login/password info our DSL service needed was in
NVRAM, that wasn't affected, but it did reset the router to start  
it's

address sequences over again.  From what tech told me, it's something
we'll need to do about every 2 years or so.  :)

Later..Howard



sorry, I haven't been following the entire thread. What about  
assigning IP addresses instead of DHCP? All you would have to do is  
give each computer a valid IP on the same subnet.


Because it's an ongoing pain in the butt if you have ANY coming and  
going of systems...


--
Bruce Johnson

This is the sig who says 'Ni!'


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Re: DHCP problems

2005-10-17 Thread Mike Kauspedas 

I had that happen to the router/firewall we use on our home network -
before I did anything, I called tech support who confirmed what I
wanted to do:  held in the reset button for about 30 sec. to reset the
router.  Since the login/password info our DSL service needed was in
NVRAM, that wasn't affected, but it did reset the router to start it's
address sequences over again.  From what tech told me, it's something
we'll need to do about every 2 years or so.  :)

Later..Howard


sorry, I haven't been following the entire thread. What about assigning 
IP addresses instead of DHCP? All you would have to do is give each 
computer a valid IP on the same subnet.


-Mike



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Re: DHCP problems

2005-10-17 Thread Howard Katz 
On 10/17/05, Bruce Johnson <[EMAIL PROTECTED]> wrote:
>

> The only drawback to long lease times is running out of IP addresses;
> since most of these home routers can serve 127 or 255 addresses, I
> doubt it'll ever be a problem.

I had that happen to the router/firewall we use on our home network -
before I did anything, I called tech support who confirmed what I
wanted to do:  held in the reset button for about 30 sec. to reset the
router.  Since the login/password info our DSL service needed was in
NVRAM, that wasn't affected, but it did reset the router to start it's
address sequences over again.  From what tech told me, it's something
we'll need to do about every 2 years or so.  :)

Later..Howard

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Re: DHCP problems

2005-10-17 Thread Bruce Johnson 


On Oct 16, 2005, at 6:44 PM, Laurent Daudelin wrote:


Ah ah! That might be it. I checked the settings on the router and  
realized

the lease was 1 hour.


That'll do it!


So, I put it at 1 day. I could go for a week. Would a
week be better than a day? My children iBooks might not be used for  
longer

than a day.


The only drawback to long lease times is running out of IP addresses;  
since most of these home routers can serve 127 or 255 addresses, I  
doubt it'll ever be a problem.


--
Bruce Johnson

This is the sig who says 'Ni!'


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Re: DHCP problems

2005-10-16 Thread Clark Martin 

At 9:44 PM -0400 10/16/05, Laurent Daudelin wrote:

on 16/10/05 15:46, Bruce Johnson at [EMAIL PROTECTED] wrote:
 > Check the lease time setting in the D-Link router. What is likely

 happening is that the powerbook is asleep longer than the lease time,
 and the D-link re-assigns the IP address to another system.

 The powerbook wakes up and someone else has it's address.


The powerbook should know it's lease has expired and re-apply for an 
address.  "Should" being the operative phrase here.



 >

 On the powerbook you can bring up the networking pref pane and renew
 the lease on the TCP/IP tab. that will get a new IP address and you
 can go.

 You can also set the lease time for much longer on the router, or
 even assign static addresses to the systems connecting to it. This

 > would be set on the D-link.
 >

 --
 Bruce Johnson
 This is the sig that says 'NI!'




Ah ah! That might be it. I checked the settings on the router and realized
the lease was 1 hour. So, I put it at 1 day. I could go for a week. Would a
week be better than a day? My children iBooks might not be used for longer
than a day.



Basically you want to set the lease time to how long you can wait to 
until applying new settings.  If you set the lease time really long 
(weeks, months) you can have problems if you need to change one of 
the settings (router address, DNS).  You can of course go through and 
manually update the lease but that is a pain if you have many 
machines.


When things are stable a day lease should be fine.  While working on 
the settings 1 hour or less is usually a good idea.


FYI, the normal protocol is for the client to renew the lease at the 
halfway mark (ie. 30 minutes for a 1 hour lease).


Changing the lease setting shouldn't foul things up, the existing 
leases should still retain their lease times until they are renewed 
then they will use the new settings.




This may be an issue with the D-Link's lease algorithm.  These in 
expensive routers are notorious for taking shortcuts on some of the 
protocols.  And DHCP in general seems to get implemented oddly by 
many vendors.



--
Clark Martin
Redwood City, CA, USA
Macintosh / Internet Consulting

"I'm a designated driver on the Information Super Highway"

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Re: DHCP problems

2005-10-16 Thread Laurent Daudelin 
on 16/10/05 15:46, Bruce Johnson at [EMAIL PROTECTED] wrote:

> 
> On Oct 16, 2005, at 11:02 AM, Laurent Daudelin wrote:
> 
>> Hello list.
>> 
>> I've been having an annoying problem for the last few weeks. I have 6
>> computers connected through a switch and a D-Link router (all wired).
>> 
>> 
>>> From time to time, for a reason that still escapes me, when a
>>> laptop (iBook
>>> 
>> or my PowerBook) wakes up from sleep, it will complain that the IP
>> address
>> it had is in use by another computer. I have DHCP enabled in the D-
>> Link
>> router with addresses going from 192.168.0.100 through
>> 192.168.0.199. Isn't
>> the DHCP server supposed to assign another address when the
>> previous one has
>> been taken? What am I doing wrong?
> 
> Check the lease time setting in the D-Link router. What is likely
> happening is that the powerbook is asleep longer than the lease time,
> and the D-link re-assigns the IP address to another system.
> 
> The powerbook wakes up and someone else has it's address.
> 
> On the powerbook you can bring up the networking pref pane and renew
> the lease on the TCP/IP tab. that will get a new IP address and you
> can go.
> 
> You can also set the lease time for much longer on the router, or
> even assign static addresses to the systems connecting to it. This
> would be set on the D-link.
> 
> --
> Bruce Johnson
> This is the sig that says 'NI!'
> 
> 

Ah ah! That might be it. I checked the settings on the router and realized
the lease was 1 hour. So, I put it at 1 day. I could go for a week. Would a
week be better than a day? My children iBooks might not be used for longer
than a day.

-Laurent.
-- 

Laurent Daudelin   AIM/iChat: LaurentDaudelin
Logiciels Nemesys Software   mailto:[EMAIL PROTECTED]

field servoid [play on `android'] /fee'ld ser'voyd/ n.: Representative of a
field service organization (see field circus). This has many of the
implications of droid.



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Re: DHCP problems

2005-10-16 Thread Bruce Johnson 


On Oct 16, 2005, at 11:02 AM, Laurent Daudelin wrote:


Hello list.

I've been having an annoying problem for the last few weeks. I have 6
computers connected through a switch and a D-Link router (all wired).


From time to time, for a reason that still escapes me, when a  
laptop (iBook


or my PowerBook) wakes up from sleep, it will complain that the IP  
address
it had is in use by another computer. I have DHCP enabled in the D- 
Link
router with addresses going from 192.168.0.100 through  
192.168.0.199. Isn't
the DHCP server supposed to assign another address when the  
previous one has

been taken? What am I doing wrong?


Check the lease time setting in the D-Link router. What is likely  
happening is that the powerbook is asleep longer than the lease time,  
and the D-link re-assigns the IP address to another system.


The powerbook wakes up and someone else has it's address.

On the powerbook you can bring up the networking pref pane and renew  
the lease on the TCP/IP tab. that will get a new IP address and you  
can go.


You can also set the lease time for much longer on the router, or  
even assign static addresses to the systems connecting to it. This  
would be set on the D-link.


--
Bruce Johnson
This is the sig that says 'NI!'



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Re: DHCP problems

2005-10-16 Thread Muddle Man 
Laurent,

The router may be set to DHCP but are all the Macs set
to use DHCP?

If they are set up as static that can obviously be the
problem. Or, if there is something wrong with the
router that may be the problem. I've not heard good
things about D-Link in that regard.

Check all the settings and let us know. Also, why a
switch and a router?

--- Laurent Daudelin <[EMAIL PROTECTED]>
wrote:

> Hello list.
> 
> I've been having an annoying problem for the last
> few weeks. I have 6
> computers connected through a switch and a D-Link
> router (all wired).
> 
> From time to time, for a reason that still escapes
> me, when a laptop (iBook
> or my PowerBook) wakes up from sleep, it will
> complain that the IP address
> it had is in use by another computer. I have DHCP
> enabled in the D-Link
> router with addresses going from 192.168.0.100
> through 192.168.0.199. Isn't
> the DHCP server supposed to assign another address
> when the previous one has
> been taken? What am I doing wrong?
> 
> Thanks for any insight on this!
> 
> -Laurent.
> -- 
>

> Laurent Daudelin   AIM/iChat: LaurentDaudelin   
> 
> Logiciels Nemesys Software  
> mailto:[EMAIL PROTECTED]
> 
> kludge: 1. /klooj/ n. Incorrect (though regrettably
> common) spelling of
> kluge (US). These two words have been confused in
> American usage since the
> early 1960s, and widely confounded in Great Britain
> since the end of World
> War II. 2. [TMRC] A crock that works. (A long-ago
> "Datamation" article by
> Jackson Granholme similarly said: "An ill-assorted
> collection of poorly
> matching parts, forming a distressing whole.") 3. v.
> To use a kludge to get
> around a problem. "I've kludged around it for now,
> but I'll fix it up
> properly later."
> 
> 
> 
> -- 
> G-Books is sponsored by 
> and...
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>  Small Dog Electronicshttp://www.smalldog.com  |
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> 
> 
> 
>
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DHCP problems

2005-10-16 Thread Laurent Daudelin 
Hello list.

I've been having an annoying problem for the last few weeks. I have 6
computers connected through a switch and a D-Link router (all wired).

>From time to time, for a reason that still escapes me, when a laptop (iBook
or my PowerBook) wakes up from sleep, it will complain that the IP address
it had is in use by another computer. I have DHCP enabled in the D-Link
router with addresses going from 192.168.0.100 through 192.168.0.199. Isn't
the DHCP server supposed to assign another address when the previous one has
been taken? What am I doing wrong?

Thanks for any insight on this!

-Laurent.
-- 

Laurent Daudelin   AIM/iChat: LaurentDaudelin
Logiciels Nemesys Software   mailto:[EMAIL PROTECTED]

kludge: 1. /klooj/ n. Incorrect (though regrettably common) spelling of
kluge (US). These two words have been confused in American usage since the
early 1960s, and widely confounded in Great Britain since the end of World
War II. 2. [TMRC] A crock that works. (A long-ago "Datamation" article by
Jackson Granholme similarly said: "An ill-assorted collection of poorly
matching parts, forming a distressing whole.") 3. v. To use a kludge to get
around a problem. "I've kludged around it for now, but I'll fix it up
properly later."



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