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Absent Member.
Absent Member.
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iPrint - DDNS question

Hi,

We want to use DHCP/DDNS to ease our printer installation. Presently we use
fixed IP adresses with the Novell Gateway (NDPSGW.NLM).

Now we have to change all our IP subneting and we want to take advantage of
DHCP/DDNS to simplify printers maintenance.

In our testing phase, we discoverd that the NDPS Manager seems to refresh
its DNS cache every hour or so. In fact if the IP addresse of a printer
change because we change is VLAN, the DNS is updated correctly but it can
take a full our for the NDPSM to print a new job on that printer. Is there
a way to manualy flush the DNS cache of the NDPS Manager.

Thank's for your help!

Config:
NW6.5 SP4
NDPSM.NLM 3.01.20 Feb 22, 2006
NDPSGW.NLM 3.02 July 14, 2005

Claude Proteau
CSRS

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3 Replies
Absent Member.
Absent Member.

If you shutdown and startup the Printer Agent for the changed printer, it
should recognize the new address on startup.

We are looking into the possibility of enhancing the Gateway to reduce the
time to recognize when a printer moves, for a future version of the Gateway.

> Hi,
>
> We want to use DHCP/DDNS to ease our printer installation. Presently we use
> fixed IP adresses with the Novell Gateway (NDPSGW.NLM).
>
> Now we have to change all our IP subneting and we want to take advantage of
> DHCP/DDNS to simplify printers maintenance.
>
> In our testing phase, we discoverd that the NDPS Manager seems to refresh
> its DNS cache every hour or so. In fact if the IP addresse of a printer
> change because we change is VLAN, the DNS is updated correctly but it can
> take a full our for the NDPSM to print a new job on that printer. Is there
> a way to manualy flush the DNS cache of the NDPS Manager.
>
> Thank's for your help!
>
> Config:
> NW6.5 SP4
> NDPSM.NLM 3.01.20 Feb 22, 2006
> NDPSGW.NLM 3.02 July 14, 2005
>
> Claude Proteau
> CSRS
>


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Absent Member.
Absent Member.

Thank's for your response....But it didn't work as you expected.

Tried another time this morning. This is what I am doing:

7:45 - Printer Host Name NPICB813f - Ip Adress 192.168.250.198
Ping from my workstation and from iPrint server OK.
Print test page OK.

7:50 - Plug the printer in another VLAN
- Now Printer Host Name NPICB813f - Ip Adress 172.19.1.119 (DHCP)
- DDNS entry updated
- Ping from workstation - old ip address - Ipconfig / flushdns - ping OK
- Ping from server - Surprise! Its OK
- NDPSM show Error Printing / Can Not Ping Printer
- Send print job to printer - do not print
- Shut down printer / Startup printer - Nothing print
- Shut down / Startup many times - Nothing

Not sure what is going on. Will try many more times today.

Claude

> If you shutdown and startup the Printer Agent for the changed printer, it
> should recognize the new address on startup.
>
> We are looking into the possibility of enhancing the Gateway to reduce the
> time to recognize when a printer moves, for a future version of the Gateway.
>
> > Hi,
> >
> > We want to use DHCP/DDNS to ease our printer installation. Presently we use
> > fixed IP adresses with the Novell Gateway (NDPSGW.NLM).
> >
> > Now we have to change all our IP subneting and we want to take advantage of
> > DHCP/DDNS to simplify printers maintenance.
> >
> > In our testing phase, we discoverd that the NDPS Manager seems to refresh
> > its DNS cache every hour or so. In fact if the IP addresse of a printer
> > change because we change is VLAN, the DNS is updated correctly but it can
> > take a full our for the NDPSM to print a new job on that printer. Is there
> > a way to manualy flush the DNS cache of the NDPS Manager.
> >
> > Thank's for your help!
> >
> > Config:
> > NW6.5 SP4
> > NDPSM.NLM 3.01.20 Feb 22, 2006
> > NDPSGW.NLM 3.02 July 14, 2005
> >
> > Claude Proteau
> > CSRS
> >

>


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Absent Member.
Absent Member.

I've made some new tests today and it apear, like i suspected yesterday,
that the printer start again to print at a precise time, with an intervale
of 1 hour.

In fact, if I change the IP address at 11:25, the printer will restart to
print at 11:51. If I change the address again at 11:55, it will print at
12:51. Yesterday it was at X:08.

This is okay, it works well, without user intervention. But i would like to
adjust the delay by myself. 1 hour is too long for us. Maybe that 15
minutes would be OK, but maybe that 30 minutes is better for an other site.

I can confirm that the Shut down / Startup option do not work.

Claude

> Thank's for your response....But it didn't work as you expected.
>
> Tried another time this morning. This is what I am doing:
>
> 7:45 - Printer Host Name NPICB813f - Ip Adress 192.168.250.198
> Ping from my workstation and from iPrint server OK.
> Print test page OK.
>
> 7:50 - Plug the printer in another VLAN
> - Now Printer Host Name NPICB813f - Ip Adress 172.19.1.119 (DHCP)
> - DDNS entry updated
> - Ping from workstation - old ip address - Ipconfig / flushdns - ping OK
> - Ping from server - Surprise! Its OK
> - NDPSM show Error Printing / Can Not Ping Printer
> - Send print job to printer - do not print
> - Shut down printer / Startup printer - Nothing print
> - Shut down / Startup many times - Nothing
>
> Not sure what is going on. Will try many more times today.
>
> Claude
>
> > If you shutdown and startup the Printer Agent for the changed printer, it
> > should recognize the new address on startup.
> >
> > We are looking into the possibility of enhancing the Gateway to reduce the
> > time to recognize when a printer moves, for a future version of the

Gateway.
> >
> > > Hi,
> > >
> > > We want to use DHCP/DDNS to ease our printer installation. Presently

we use
> > > fixed IP adresses with the Novell Gateway (NDPSGW.NLM).
> > >
> > > Now we have to change all our IP subneting and we want to take

advantage of
> > > DHCP/DDNS to simplify printers maintenance.
> > >
> > > In our testing phase, we discoverd that the NDPS Manager seems to refresh
> > > its DNS cache every hour or so. In fact if the IP addresse of a printer
> > > change because we change is VLAN, the DNS is updated correctly but it can
> > > take a full our for the NDPSM to print a new job on that printer. Is

there
> > > a way to manualy flush the DNS cache of the NDPS Manager.
> > >
> > > Thank's for your help!
> > >
> > > Config:
> > > NW6.5 SP4
> > > NDPSM.NLM 3.01.20 Feb 22, 2006
> > > NDPSGW.NLM 3.02 July 14, 2005
> > >
> > > Claude Proteau
> > > CSRS
> > >

> >

>


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