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Mac > Mac Printing > Re: Wireless st...
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Re: Wireless stopping print communications

by Bob Harris <nospam.News.Bob@[EMAIL PROTECTED] > Aug 23, 2007 at 01:34 AM

In article 
<1187821019.111434.71990@[EMAIL PROTECTED]
>,
 Jarbacky <becface@[EMAIL PROTECTED]
> wrote:

> Hello - I am trying to add a wireless router to my current setup. I
> have tried both Netgear and Linksys G routers with the same effect.
> 
> As soon as I add the wireless, it works great but then I can't print.
> When I disconnect the wireless printing works again just fine.
> 
> Here is the flow of connections all via cat 5:
> 
> Wall: Cable to
> Modem: Surfboard SB4100 to
> D-Link Ethernet Broadband Router DI-604 to:
> 
>  1. Asante Friendly net 5 ****t Ethernet hub to PRINTER (Elite XL 808)
>  2. Linksys/netgear wireless router to Mac OS X computer
> 
> Can anyone tell me why adding a wireless router would make the printer
> stop responding? So weird to me.
> 
> Thanks for any help.
> 
> R

Yes, you have put an active router (linksys/netgear) between your 
Mac and the printer.  This means you have 

        cable modem
            |
        D-Link router
            |
          <D-Link subnet> -- Elite XL 808
            |
        Linksys/Netgear router
            |
          <Linksys/Netgear subnet>
            |
        Your Mac

The Bonjour protocols will NOT cross a router boundary.  Bonjour 
protocols only travel around the local subnet they are on.  Or to 
put it differently, routers are designed not to route some 
protocols between subnets, and Bonjour is one of them.

If you were to try and connect to the printer via its IP address, 
that would not work, because most likely your printer has a 
non-routable IP address from its D-Link subnet.  Addresses in the 
range of 10.*.*.*, or 192.168.*.* are non-routable addresses 
(D-Link most likely uses the 198.168.*.* range).  

This means any attempt to directly address a 192.168.*.* address 
will not be passed to the other side of a home router.

What to do?

Configure the Linksys or Netgear router to turn OFF the DHCP and 
NAT services.  This will turn the router into a bridge, and extend 
the D-Link subnet to the devices connected to the Linksys or 
Netgear connected devices.  

The D-Link will then be the only router in the home.  It will 
provide all the DHCP address assignments, and it will provide the 
NAT services for the home.

And because you now have only 1 subnet in the home, Bonjour 
to/from the printer will be seen by all the systems in the house, 
and addressing a 192.168.*.* address will be seen by all the 
systems in the house.

I really wish the router companies would put some kind of smarts 
into home routers that would alert down stream secondary routers 
that they are NOT the primary router and out of the box turn off 
DHCP and NAT.  I know this thought is subject to failure, as some 
IPS use 192.168.*.* or 10.*.*.* subnets of their own.  But it sure 
would be nice if people didn't get tripped up when they get a Wifi 
base station and found they had problems talking to other systems 
in the house that were on the wrong side of the new router.

I hope this helps.  If it is any consolation, I found this stuff 
out the hard way myself.

                                        Bob Harris
 




 5 Posts in Topic:
Wireless stopping print communications
Jarbacky <becface@[EMA  2007-08-22 22:16:59 
Re: Wireless stopping print communications
Bob Harris <nospam.New  2007-08-23 01:34:04 
Re: Wireless stopping print communications
Fred McKenzie <fmmck@[  2007-08-23 14:46:23 
Re: Wireless stopping print communications
Bruce in Alaska <bruc  2007-08-23 19:06:14 
Re: Wireless stopping print communications
Jarbacky <becface@[EMA  2007-10-08 18:34:12 

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tan12V112 Fri Aug 29 14:47:10 CDT 2008.