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False IP conflict message...?We have six systems, a wireless access point, and a wireless print server, behind a router. The WAP, and the WPS have static IP addresses, and the systems are all DHCP. On occasion, we get an error on one of the systems saying that there is a duplicate IP address. We have checked with care, and it ain't so... What might be causing the error, and (other than the modest inconvenience) can I ignore it? Also, is there a way to find out what the system displaying the error thinks the problem is specifically? (I should add that I have checked the event viewer tree, but it shows nothing relevant. Oddly, the System branch shows a string of information entries dated 7-9-09 which caused me to check the system date, which is fine. Weird...) Thanks for any help, -- Kenneth If you email... Please remove the "SPAMLESS." Kenneth wrote:
Show quoteHide quote > My guess is that you haven't set the static IP addresses outside of the DHCP> Howdy, > > We have six systems, a wireless access point, and a wireless > print server, behind a router. > > The WAP, and the WPS have static IP addresses, and the > systems are all DHCP. > > On occasion, we get an error on one of the systems saying > that there is a duplicate IP address. > > We have checked with care, and it ain't so... > > What might be causing the error, and (other than the modest > inconvenience) can I ignore it? > > Also, is there a way to find out what the system displaying > the error thinks the problem is specifically? > > (I should add that I have checked the event viewer tree, but > it shows nothing relevant. Oddly, the System branch shows a > string of information entries dated 7-9-09 which caused me > to check the system date, which is fine. Weird...) address range. So if your print server, for ex., is 192.168.1.3 and one of the computers gets 192.168.1.3 before the print server "wakes up" as it were, you'll get this kind of IP conflict. Go into your router's configuration utility and check your DHCP range. Set it to something like 192.168.1.2-192.168.1.149 (obviously substitute your correct subnet). Then assign static IPs for printers, print servers, wireless access points, etc. to addresses above that. Malke On Mon, 23 Feb 2009 06:57:36 -0800, Malke
<malke@invalid.invalid> wrote: Show quoteHide quote >Kenneth wrote: Hi Malke,> >> >> Howdy, >> >> We have six systems, a wireless access point, and a wireless >> print server, behind a router. >> >> The WAP, and the WPS have static IP addresses, and the >> systems are all DHCP. >> >> On occasion, we get an error on one of the systems saying >> that there is a duplicate IP address. >> >> We have checked with care, and it ain't so... >> >> What might be causing the error, and (other than the modest >> inconvenience) can I ignore it? >> >> Also, is there a way to find out what the system displaying >> the error thinks the problem is specifically? >> >> (I should add that I have checked the event viewer tree, but >> it shows nothing relevant. Oddly, the System branch shows a >> string of information entries dated 7-9-09 which caused me >> to check the system date, which is fine. Weird...) > >My guess is that you haven't set the static IP addresses outside of the DHCP >address range. So if your print server, for ex., is 192.168.1.3 and one of >the computers gets 192.168.1.3 before the print server "wakes up" as it >were, you'll get this kind of IP conflict. > >Go into your router's configuration utility and check your DHCP range. Set >it to something like 192.168.1.2-192.168.1.149 (obviously substitute your >correct subnet). Then assign static IPs for printers, print servers, >wireless access points, etc. to addresses above that. > >Malke I will certainly give it a try, and thank you for the suggestion, -- Kenneth If you email... Please remove the "SPAMLESS." On Mon, 23 Feb 2009 12:42:15 -0500, Kenneth
<usenet@soleSPAMLESSassociates.com> wrote: Show quoteHide quote >On Mon, 23 Feb 2009 06:57:36 -0800, Malke Hi again Malke,><malke@invalid.invalid> wrote: > >>Kenneth wrote: >> >>> >>> Howdy, >>> >>> We have six systems, a wireless access point, and a wireless >>> print server, behind a router. >>> >>> The WAP, and the WPS have static IP addresses, and the >>> systems are all DHCP. >>> >>> On occasion, we get an error on one of the systems saying >>> that there is a duplicate IP address. >>> >>> We have checked with care, and it ain't so... >>> >>> What might be causing the error, and (other than the modest >>> inconvenience) can I ignore it? >>> >>> Also, is there a way to find out what the system displaying >>> the error thinks the problem is specifically? >>> >>> (I should add that I have checked the event viewer tree, but >>> it shows nothing relevant. Oddly, the System branch shows a >>> string of information entries dated 7-9-09 which caused me >>> to check the system date, which is fine. Weird...) >> >>My guess is that you haven't set the static IP addresses outside of the DHCP >>address range. So if your print server, for ex., is 192.168.1.3 and one of >>the computers gets 192.168.1.3 before the print server "wakes up" as it >>were, you'll get this kind of IP conflict. >> >>Go into your router's configuration utility and check your DHCP range. Set >>it to something like 192.168.1.2-192.168.1.149 (obviously substitute your >>correct subnet). Then assign static IPs for printers, print servers, >>wireless access points, etc. to addresses above that. >> >>Malke > >Hi Malke, > >I will certainly give it a try, and thank you for the >suggestion, Well, it was such a good idea, that I apparently had done it already: The router's DHCP range is set to provide 40 addresses starting from 192.168.1.100. The two static addresses are 192.168.1.245, and 192.168.1.150, so they are out of range. Might you have any other thoughts about this? Thanks again, -- Kenneth If you email... Please remove the "SPAMLESS." Kenneth wrote:
> Well, it was such a good idea, that I apparently had done it No, I'm sorry but I don't. But hopefully one of the networking gurus will> already: > > The router's DHCP range is set to provide 40 addresses > starting from 192.168.1.100. > > The two static addresses are 192.168.1.245, and > 192.168.1.150, so they are out of range. > > Might you have any other thoughts about this? come around. You might want to check on MVP Jack's site to see if he covers this. http://www.ezlan.net Malke Hi
If your Router can do IP reservation within the DHCP (aka Static IP) set it so that the Wired and Wireless computers that you have onsite would obtain always the same IP (it usually goes by their MAC number) and would benefit from being on a DHCP server. This way any additional transient computers would choose an IP that is Not reserved, and the onsite computers would always get their personal address. It is also better for the Mapped and Shared Drives to be on Reserved the IP since they would be always at the same Network spot. Jack (MS, MVP-Networking) Show quoteHide quote "Kenneth" <usenet@soleSPAMLESSassociates.com> wrote in message news:llc5q4tvmd3iabs19a7v14qjd20ogqevsa@4ax.com... > > Howdy, > > We have six systems, a wireless access point, and a wireless > print server, behind a router. > > The WAP, and the WPS have static IP addresses, and the > systems are all DHCP. > > On occasion, we get an error on one of the systems saying > that there is a duplicate IP address. > > We have checked with care, and it ain't so... > > What might be causing the error, and (other than the modest > inconvenience) can I ignore it? > > Also, is there a way to find out what the system displaying > the error thinks the problem is specifically? > > (I should add that I have checked the event viewer tree, but > it shows nothing relevant. Oddly, the System branch shows a > string of information entries dated 7-9-09 which caused me > to check the system date, which is fine. Weird...) > > Thanks for any help, > -- > Kenneth > > If you email... Please remove the "SPAMLESS." On Mon, 23 Feb 2009 15:25:30 -0500, "Jack
\(MVP-Networking\)." <j***@discussiongroup.com> wrote: Show quoteHide quote >"Kenneth" <usenet@soleSPAMLESSassociates.com> wrote in message Hi Jack,>news:llc5q4tvmd3iabs19a7v14qjd20ogqevsa@4ax.com... >> >> Howdy, >> >> We have six systems, a wireless access point, and a wireless >> print server, behind a router. >> >> The WAP, and the WPS have static IP addresses, and the >> systems are all DHCP. >> >> On occasion, we get an error on one of the systems saying >> that there is a duplicate IP address. >> >> We have checked with care, and it ain't so... >> >> What might be causing the error, and (other than the modest >> inconvenience) can I ignore it? >> >> Also, is there a way to find out what the system displaying >> the error thinks the problem is specifically? >> >> (I should add that I have checked the event viewer tree, but >> it shows nothing relevant. Oddly, the System branch shows a >> string of information entries dated 7-9-09 which caused me >> to check the system date, which is fine. Weird...) >> >> Thanks for any help, >> -- >> Kenneth >> >> If you email... Please remove the "SPAMLESS." Unfortunately, my router will not do the "reserved address" stuff. It does seem to me that the error message is spurious, and it seems not to have caused any difficulty (other than its occasional appearance), but I would like to learn more about what might be causing it. Is there any way that this problem could be caused by flakiness in the router itself? I ask because in the last month or so, I have found that, on occasion, one, or more, of our systems seems to "disappear" from the lan. When we spot that problem, we have rebooted the router and all has been well. The router is a Linksys, and I do suspect that it is entering its last days. Thanks for your thoughts, -- Kenneth If you email... Please remove the "SPAMLESS." Hi
Yap, the Linksys line does not do DHCP Reservation. However if it is a model that can be flashed with DD_WRT you might be able to flash the firmware have Reservation and infuse new life to the Router. Look here, http://www.dd-wrt.com/wiki/index.php/Main_Page Jack (MS, MVP-Networking) Show quoteHide quote "Kenneth" <usenet@soleSPAMLESSassociates.com> wrote in message news:v476q41t3chec0h06lbj4ceer7lg5lchl2@4ax.com... > On Mon, 23 Feb 2009 15:25:30 -0500, "Jack > \(MVP-Networking\)." <j***@discussiongroup.com> wrote: > > >>"Kenneth" <usenet@soleSPAMLESSassociates.com> wrote in message >>news:llc5q4tvmd3iabs19a7v14qjd20ogqevsa@4ax.com... >>> >>> Howdy, >>> >>> We have six systems, a wireless access point, and a wireless >>> print server, behind a router. >>> >>> The WAP, and the WPS have static IP addresses, and the >>> systems are all DHCP. >>> >>> On occasion, we get an error on one of the systems saying >>> that there is a duplicate IP address. >>> >>> We have checked with care, and it ain't so... >>> >>> What might be causing the error, and (other than the modest >>> inconvenience) can I ignore it? >>> >>> Also, is there a way to find out what the system displaying >>> the error thinks the problem is specifically? >>> >>> (I should add that I have checked the event viewer tree, but >>> it shows nothing relevant. Oddly, the System branch shows a >>> string of information entries dated 7-9-09 which caused me >>> to check the system date, which is fine. Weird...) >>> >>> Thanks for any help, >>> -- >>> Kenneth >>> >>> If you email... Please remove the "SPAMLESS." > > Hi Jack, > > Unfortunately, my router will not do the "reserved address" > stuff. > > It does seem to me that the error message is spurious, and > it seems not to have caused any difficulty (other than its > occasional appearance), but I would like to learn more about > what might be causing it. > > Is there any way that this problem could be caused by > flakiness in the router itself? I ask because in the last > month or so, I have found that, on occasion, one, or more, > of our systems seems to "disappear" from the lan. When we > spot that problem, we have rebooted the router and all has > been well. The router is a Linksys, and I do suspect that it > is entering its last days. > > Thanks for your thoughts, > -- > Kenneth > > If you email... Please remove the "SPAMLESS." On Mon, 23 Feb 2009 19:34:44 -0500, "Jack
\(MVP-Networking\)." <j***@discussiongroup.com> wrote: >Hi Hi Jack and All,>Yap, the Linksys line does not do DHCP Reservation. >However if it is a model that can be flashed with DD_WRT you might be able >to flash the firmware have Reservation and infuse new life to the Router. >Look here, http://www.dd-wrt.com/wiki/index.php/Main_Page >Jack (MS, MVP-Networking) I had been having occasional error messages telling me that two devices on our LAN had the same IP address, but I could not trace it down because when I looked at each address, they were, indeed, unique. Well, it happened again today, but this time, something showed up in Event Viewer. It provided the MAC address of the device assigned the IP address that was in conflict. ('Sounds good so far, huh...?) Well, I can't find a device with that MAC address. I know it's out there, but I have not been able to find it. Is there an approach to this situation that I am missing? Many thanks for any help, -- Kenneth If you email... Please remove the "SPAMLESS." Kenneth wrote:
Show quoteHide quote > On Mon, 23 Feb 2009 19:34:44 -0500, "Jack The first six characters of the MAC address identify the device > \(MVP-Networking\)." <j***@discussiongroup.com> wrote: > >> Hi >> Yap, the Linksys line does not do DHCP Reservation. >> However if it is a model that can be flashed with DD_WRT you might be able >> to flash the firmware have Reservation and infuse new life to the Router. >> Look here, http://www.dd-wrt.com/wiki/index.php/Main_Page >> Jack (MS, MVP-Networking) > > Hi Jack and All, > > I had been having occasional error messages telling me that > two devices on our LAN had the same IP address, but I could > not trace it down because when I looked at each address, > they were, indeed, unique. > > Well, it happened again today, but this time, something > showed up in Event Viewer. > > It provided the MAC address of the device assigned the IP > address that was in conflict. > > ('Sounds good so far, huh...?) > > Well, I can't find a device with that MAC address. I know > it's out there, but I have not been able to find it. > > Is there an approach to this situation that I am missing? > > Many thanks for any help, manufacturer. Perhaps that would help you find it. http://www.coffer.com/mac_find/ Otherwise ... how is your network protected from intruders? -- Lem -- MS-MVP To the moon and back with 2K words of RAM and 36K words of ROM. http://en.wikipedia.org/wiki/Apollo_Guidance_Computer http://history.nasa.gov/afj/compessay.htm On Wed, 11 Mar 2009 12:19:52 -0400, Lem <lemp40@unknownhost>
wrote: Show quoteHide quote >Kenneth wrote: Hi again,>> On Mon, 23 Feb 2009 19:34:44 -0500, "Jack >> \(MVP-Networking\)." <j***@discussiongroup.com> wrote: >> >>> Hi >>> Yap, the Linksys line does not do DHCP Reservation. >>> However if it is a model that can be flashed with DD_WRT you might be able >>> to flash the firmware have Reservation and infuse new life to the Router. >>> Look here, http://www.dd-wrt.com/wiki/index.php/Main_Page >>> Jack (MS, MVP-Networking) >> >> Hi Jack and All, >> >> I had been having occasional error messages telling me that >> two devices on our LAN had the same IP address, but I could >> not trace it down because when I looked at each address, >> they were, indeed, unique. >> >> Well, it happened again today, but this time, something >> showed up in Event Viewer. >> >> It provided the MAC address of the device assigned the IP >> address that was in conflict. >> >> ('Sounds good so far, huh...?) >> >> Well, I can't find a device with that MAC address. I know >> it's out there, but I have not been able to find it. >> >> Is there an approach to this situation that I am missing? >> >> Many thanks for any help, > >The first six characters of the MAC address identify the device >manufacturer. Perhaps that would help you find it. >http://www.coffer.com/mac_find/ > >Otherwise ... how is your network protected from intruders? Our 7 systems are behind a router... (and I will check the site you suggested.) Many thanks, -- Kenneth If you email... Please remove the "SPAMLESS." On Mar 11, 6:08 pm, Kenneth <use...@soleSPAMLESSassociates.com> wrote:
Show quoteHide quote > On Wed, 11 Mar 2009 12:19:52 -0400, Lem <lemp40@unknownhost> Is this a wireless router?> wrote: > > > > >Kenneth wrote: > >> On Mon, 23 Feb 2009 19:34:44 -0500, "Jack > >> \(MVP-Networking\)." <j***@discussiongroup.com> wrote: > > >>> Hi > >>> Yap, the Linksys line does not do DHCP Reservation. > >>> However if it is a model that can be flashed with DD_WRT you might be able > >>> to flash the firmware have Reservation and infuse new life to the Router. > >>> Look here,http://www.dd-wrt.com/wiki/index.php/Main_Page > >>> Jack (MS, MVP-Networking) > > >> Hi Jack and All, > > >> I had been having occasional error messages telling me that > >> two devices on our LAN had the same IP address, but I could > >> not trace it down because when I looked at each address, > >> they were, indeed, unique. > > >> Well, it happened again today, but this time, something > >> showed up in Event Viewer. > > >> It provided the MAC address of the device assigned the IP > >> address that was in conflict. > > >> ('Sounds good so far, huh...?) > > >> Well, I can't find a device with that MAC address. I know > >> it's out there, but I have not been able to find it. > > >> Is there an approach to this situation that I am missing? > > >> Many thanks for any help, > > >The first six characters of the MAC address identify the device > >manufacturer. Perhaps that would help you find it. > >http://www.coffer.com/mac_find/ > > >Otherwise ... how is your network protected from intruders? > > Hi again, > > Our 7 systems are behind a router... > > (and I will check the site you suggested.) > > Many thanks, > -- > Kenneth > > If you email... Please remove the "SPAMLESS." If yes, does the wireless network have a WiFi security access key (WEP, WPA or WPA2?) If it does not, you may have someone "piggy- backing" onto your Internet access. Also, you might want to check the router's status pages and check to see what "devices" are currently connected to the router. Check which are truly yours. On Wed, 11 Mar 2009 11:20:58 -0700 (PDT), smlunatick
<yves***@gmail.com> wrote: Show quoteHide quote >On Mar 11, 6:08 pm, Kenneth <use...@soleSPAMLESSassociates.com> wrote: Hi again,>> On Wed, 11 Mar 2009 12:19:52 -0400, Lem <lemp40@unknownhost> >> wrote: >> >> >> >> >Kenneth wrote: >> >> On Mon, 23 Feb 2009 19:34:44 -0500, "Jack >> >> \(MVP-Networking\)." <j***@discussiongroup.com> wrote: >> >> >>> Hi >> >>> Yap, the Linksys line does not do DHCP Reservation. >> >>> However if it is a model that can be flashed with DD_WRT you might be able >> >>> to flash the firmware have Reservation and infuse new life to the Router. >> >>> Look here,http://www.dd-wrt.com/wiki/index.php/Main_Page >> >>> Jack (MS, MVP-Networking) >> >> >> Hi Jack and All, >> >> >> I had been having occasional error messages telling me that >> >> two devices on our LAN had the same IP address, but I could >> >> not trace it down because when I looked at each address, >> >> they were, indeed, unique. >> >> >> Well, it happened again today, but this time, something >> >> showed up in Event Viewer. >> >> >> It provided the MAC address of the device assigned the IP >> >> address that was in conflict. >> >> >> ('Sounds good so far, huh...?) >> >> >> Well, I can't find a device with that MAC address. I know >> >> it's out there, but I have not been able to find it. >> >> >> Is there an approach to this situation that I am missing? >> >> >> Many thanks for any help, >> >> >The first six characters of the MAC address identify the device >> >manufacturer. Perhaps that would help you find it. >> >http://www.coffer.com/mac_find/ >> >> >Otherwise ... how is your network protected from intruders? >> >> Hi again, >> >> Our 7 systems are behind a router... >> >> (and I will check the site you suggested.) >> >> Many thanks, >> -- >> Kenneth >> >> If you email... Please remove the "SPAMLESS." > >Is this a wireless router? >If yes, does the wireless network have a WiFi security access key >(WEP, WPA or WPA2?) If it does not, you may have someone "piggy- >backing" onto your Internet access. > >Also, you might want to check the router's status pages and check to >see what "devices" are currently connected to the router. Check which >are truly yours. The router is not wireless... I had not thought to check the status page and will do that later today. Thanks, -- Kenneth If you email... Please remove the "SPAMLESS." On Wed, 11 Mar 2009 15:00:23 -0400, Kenneth
<usenet@soleSPAMLESSassociates.com> wrote: Show quoteHide quote >On Wed, 11 Mar 2009 11:20:58 -0700 (PDT), smlunatick Hi again All,><yves***@gmail.com> wrote: > >>On Mar 11, 6:08 pm, Kenneth <use...@soleSPAMLESSassociates.com> wrote: >>> On Wed, 11 Mar 2009 12:19:52 -0400, Lem <lemp40@unknownhost> >>> wrote: >>> >>> >>> >>> >Kenneth wrote: >>> >> On Mon, 23 Feb 2009 19:34:44 -0500, "Jack >>> >> \(MVP-Networking\)." <j***@discussiongroup.com> wrote: >>> >>> >>> Hi >>> >>> Yap, the Linksys line does not do DHCP Reservation. >>> >>> However if it is a model that can be flashed with DD_WRT you might be able >>> >>> to flash the firmware have Reservation and infuse new life to the Router. >>> >>> Look here,http://www.dd-wrt.com/wiki/index.php/Main_Page >>> >>> Jack (MS, MVP-Networking) >>> >>> >> Hi Jack and All, >>> >>> >> I had been having occasional error messages telling me that >>> >> two devices on our LAN had the same IP address, but I could >>> >> not trace it down because when I looked at each address, >>> >> they were, indeed, unique. >>> >>> >> Well, it happened again today, but this time, something >>> >> showed up in Event Viewer. >>> >>> >> It provided the MAC address of the device assigned the IP >>> >> address that was in conflict. >>> >>> >> ('Sounds good so far, huh...?) >>> >>> >> Well, I can't find a device with that MAC address. I know >>> >> it's out there, but I have not been able to find it. >>> >>> >> Is there an approach to this situation that I am missing? >>> >>> >> Many thanks for any help, >>> >>> >The first six characters of the MAC address identify the device >>> >manufacturer. Perhaps that would help you find it. >>> >http://www.coffer.com/mac_find/ >>> >>> >Otherwise ... how is your network protected from intruders? >>> >>> Hi again, >>> >>> Our 7 systems are behind a router... >>> >>> (and I will check the site you suggested.) >>> >>> Many thanks, >>> -- >>> Kenneth >>> >>> If you email... Please remove the "SPAMLESS." >> >>Is this a wireless router? >>If yes, does the wireless network have a WiFi security access key >>(WEP, WPA or WPA2?) If it does not, you may have someone "piggy- >>backing" onto your Internet access. >> >>Also, you might want to check the router's status pages and check to >>see what "devices" are currently connected to the router. Check which >>are truly yours. > >Hi again, > >The router is not wireless... > >I had not thought to check the status page and will do that >later today. > >Thanks, It took a while, but, I am making progress... I just got the "System detected an IP address conflict" error that I had described. Event viewer told me the MAC address of the hardware with which there was a conflict. It was my iPhone. It had an ip address of 192.168.1.105. I turned off the iPhone, and looked at the ip address of the system that displayed the error. It was the same as the iPhone, 192.168.1.105. (Things will get stranger in a moment, but...) I rebooted the iPhone, and it got an ip address of 192.168.1.106. So, at that point, there was no conflict. Of course, I had no idea how the DHCP could dole out the same address twice. Next, with several systems (and the iPhone) on the LAN, I went into the router's configuration and looked at the DHCP table. It showed the system with the original error message as 192.168.1.104, and I thought that I had recalled something incorrectly (because I remembered it as 192.168.1.105) so I ran ipconfig, and it showed 192.168.1.105. At that point the DHCP table did not match the actual assignments, so I click to refresh the table. The screen refreshed, but nothing was modified. With apologies for what may be excessive detail, I am stuck: The router's DHCP table does not match the reality of the assignments, and the router apparently assigns addresses that are already in use. Is it new router time? Thanks for any help on this, Many thanks, -- Kenneth If you email... Please remove the "SPAMLESS." Kenneth <usenet@soleSPAMLESSassociates.com> wrote in
Show quoteHide quote news:0q10s496lhl14f1ncaaj15fmh4fd5tps9c@4ax.com: Two things I would do at this point in time:> It took a while, but, I am making progress... > > I just got the "System detected an IP address conflict" > error that I had described. > > Event viewer told me the MAC address of the hardware with > which there was a conflict. > > It was my iPhone. > > It had an ip address of 192.168.1.105. > > I turned off the iPhone, and looked at the ip address of the > system that displayed the error. It was the same as the > iPhone, 192.168.1.105. > > (Things will get stranger in a moment, but...) > > I rebooted the iPhone, and it got an ip address of > 192.168.1.106. So, at that point, there was no conflict. > > Of course, I had no idea how the DHCP could dole out the > same address twice. > > Next, with several systems (and the iPhone) on the LAN, I > went into the router's configuration and looked at the DHCP > table. > > It showed the system with the original error message as > 192.168.1.104, and I thought that I had recalled something > incorrectly (because I remembered it as 192.168.1.105) so I > ran ipconfig, and it showed 192.168.1.105. > > At that point the DHCP table did not match the actual > assignments, so I click to refresh the table. The screen > refreshed, but nothing was modified. > > With apologies for what may be excessive detail, I am stuck: > > The router's DHCP table does not match the reality of the > assignments, and the router apparently assigns addresses > that are already in use. > > Is it new router time? > 1) Unplug your router from its power source for several seconds and repower it. Perhaps it just needs a fresh reset. Power-cycle all connecting devices as well. My router's DHCP server fails about every 2 months or so. Power cycling fixes it for another couple of months. 2) Check the router manufacturer's web site for updated firmware for the router. This might be a common problem with that make/model of router that has been corrected with a new firmware load. HTH, John On Mar 17, 8:49 pm, Kenneth <use...@soleSPAMLESSassociates.com> wrote:
Show quoteHide quote > On Wed, 11 Mar 2009 15:00:23 -0400, Kenneth Some DHCP service / servers can have a "bug" assigning IPs. Some seem> > > > <use...@soleSPAMLESSassociates.com> wrote: > >On Wed, 11 Mar 2009 11:20:58 -0700 (PDT), smlunatick > ><yves***@gmail.com> wrote: > > >>On Mar 11, 6:08 pm, Kenneth <use...@soleSPAMLESSassociates.com> wrote: > >>> On Wed, 11 Mar 2009 12:19:52 -0400, Lem <lemp40@unknownhost> > >>> wrote: > > >>> >Kenneth wrote: > >>> >> On Mon, 23 Feb 2009 19:34:44 -0500, "Jack > >>> >> \(MVP-Networking\)." <j***@discussiongroup.com> wrote: > > >>> >>> Hi > >>> >>> Yap, the Linksys line does not do DHCP Reservation. > >>> >>> However if it is a model that can be flashed with DD_WRT you might be able > >>> >>> to flash the firmware have Reservation and infuse new life to the Router. > >>> >>> Look here,http://www.dd-wrt.com/wiki/index.php/Main_Page > >>> >>> Jack (MS, MVP-Networking) > > >>> >> Hi Jack and All, > > >>> >> I had been having occasional error messages telling me that > >>> >> two devices on our LAN had the same IP address, but I could > >>> >> not trace it down because when I looked at each address, > >>> >> they were, indeed, unique. > > >>> >> Well, it happened again today, but this time, something > >>> >> showed up in Event Viewer. > > >>> >> It provided the MAC address of the device assigned the IP > >>> >> address that was in conflict. > > >>> >> ('Sounds good so far, huh...?) > > >>> >> Well, I can't find a device with that MAC address. I know > >>> >> it's out there, but I have not been able to find it. > > >>> >> Is there an approach to this situation that I am missing? > > >>> >> Many thanks for any help, > > >>> >The first six characters of the MAC address identify the device > >>> >manufacturer. Perhaps that would help you find it. > >>> >http://www.coffer.com/mac_find/ > > >>> >Otherwise ... how is your network protected from intruders? > > >>> Hi again, > > >>> Our 7 systems are behind a router... > > >>> (and I will check the site you suggested.) > > >>> Many thanks, > >>> -- > >>> Kenneth > > >>> If you email... Please remove the "SPAMLESS." > > >>Is this a wireless router? > >>If yes, does the wireless network have a WiFi security access key > >>(WEP, WPA or WPA2?) If it does not, you may have someone "piggy- > >>backing" onto your Internet access. > > >>Also, you might want to check the router's status pages and check to > >>see what "devices" are currently connected to the router. Check which > >>are truly yours. > > >Hi again, > > >The router is not wireless... > > >I had not thought to check the status page and will do that > >later today. > > >Thanks, > > Hi again All, > > It took a while, but, I am making progress... > > I just got the "System detected an IP address conflict" > error that I had described. > > Event viewer told me the MAC address of the hardware with > which there was a conflict. > > It was my iPhone. > > It had an ip address of 192.168.1.105. > > I turned off the iPhone, and looked at the ip address of the > system that displayed the error. It was the same as the > iPhone, 192.168.1.105. > > (Things will get stranger in a moment, but...) > > I rebooted the iPhone, and it got an ip address of > 192.168.1.106. So, at that point, there was no conflict. > > Of course, I had no idea how the DHCP could dole out the > same address twice. > > Next, with several systems (and the iPhone) on the LAN, I > went into the router's configuration and looked at the DHCP > table. > > It showed the system with the original error message as > 192.168.1.104, and I thought that I had recalled something > incorrectly (because I remembered it as 192.168.1.105) so I > ran ipconfig, and it showed 192.168.1.105. > > At that point the DHCP table did not match the actual > assignments, so I click to refresh the table. The screen > refreshed, but nothing was modified. > > With apologies for what may be excessive detail, I am stuck: > > The router's DHCP table does not match the reality of the > assignments, and the router apparently assigns addresses > that are already in use. > > Is it new router time? > > Thanks for any help on this, > > Many thanks, > -- > Kenneth > > If you email... Please remove the "SPAMLESS." to require to detect all "assigned" devices before recycling IP addresses. On Wed, 18 Mar 2009 10:04:13 -0700 (PDT), smlunatick
<yves***@gmail.com> wrote: > Hi again,>Some DHCP service / servers can have a "bug" assigning IPs. Some seem >to require to detect all "assigned" devices before recycling IP >addresses. Would there be something I can do about the problem...? Thanks, -- Kenneth If you email... Please remove the "SPAMLESS." On Mar 18, 5:13 pm, Kenneth <use...@soleSPAMLESSassociates.com> wrote:
Show quoteHide quote > On Wed, 18 Mar 2009 10:04:13 -0700 (PDT), smlunatick Depending on the DHCP server / unit / service, there might be an> > <yves***@gmail.com> wrote: > > >Some DHCP service / servers can have a "bug" assigning IPs. Some seem > >to require to detect all "assigned" devices before recycling IP > >addresses. > > Hi again, > > Would there be something I can do about the problem...? > > Thanks, > -- > Kenneth > > If you email... Please remove the "SPAMLESS." update / fix / firmware upgrade. May or may not "fix" this "bug" unless the DHCP "maker" had "deemed" that their DHCP is to work that way. It would be easier to take note of this previous problem since it can, and will, re-occur. On Wed, 18 Mar 2009 13:27:33 -0700 (PDT), smlunatick
<yves***@gmail.com> wrote: > Hi again,>It would be easier to take note of this previous problem since it can, >and will, re-occur. With apology, I do not understand your comment above... Of course, I understand that it might occur again, but what do you mean by my taking note of it? Thanks again, -- Kenneth If you email... Please remove the "SPAMLESS." On Mar 19, 12:47 am, Kenneth <use...@soleSPAMLESSassociates.com>
wrote: Show quoteHide quote > On Wed, 18 Mar 2009 13:27:33 -0700 (PDT), smlunatick Note which possible "devices" that might get the "same" IP and write> > <yves***@gmail.com> wrote: > > >It would be easier to take note of this previous problem since it can, > >and will, re-occur. > > Hi again, > > With apology, I do not understand your comment above... > > Of course, I understand that it might occur again, but what > do you mean by my taking note of it? > > Thanks again, > -- > Kenneth > > If you email... Please remove the "SPAMLESS." down the steps you did to fix this problem. Apple is reported to be releasing a revised platform for the iPhone. I live in Canada, where the only authorized cell carrier of the iPhone is "over-charging" the plan. Because of this over-charge, it is rumoured that "only" Canadian Apple Store is refusing to sell the iPhones. 
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