[cups.general] auto-discover of network printers relies on ip6?

Michael Sweet msweet at apple.com
Tue Apr 3 09:23:31 PDT 2012


Willie,

I'd check your /etc/cups/snmp.conf file to see what it there (it *should* be using @LOCAL for the address, which automatically uses the right broadcast addresses).


On Apr 3, 2012, at 6:32 AM, willie <tumbleweed at fast-mail.org> wrote:

> 
> Thanks again.
> 
> /usr/lib/cups/backend/snmp @LOCAL
> 
> returns:
> 
> network lpd://leda/BINARY_P1 "Brother HL-5250DN series" "Brother HL-5250DN series" "MFG:Brother;CMD:PJL,PCL,PCLXL,POSTSCRIPT;MDL:HL-5250DN series;CLS:PRINTER;" ""
> 
> ..which looks ok to my cups-novice eyes. Do you think this is an issue with my configs (as I do, suspecting many others would have been here before and said something's wrong) or do we have a bug?
> 
> Tonight I'll try someone else's machine here running a different distro.
> Willing to try anything else on your advice.
> 
> 
> 
> 
> 
>> Hmm, not sure why this is having trouble then...  Do you see any errors if you run:
>> 
>> 	/usr/lib/cups/backend/snmp @LOCAL
>> 
>> On Mar 26, 2012, at 4:24 PM, willie wrote:
>> 
>>> 
>>> I hadn't even thought of looking at the printer config, but no:
>>> 
>>> TCP/IP        Enabled
>>> IPv6        Disabled
>>> SMTP          Disabled
>>> NETBIOS/IP    Enabled
>>> IPP           Enabled
>>> FTP           Enabled
>>> mDNS          Disabled
>>> APIPA         Disabled
>>> SNMP          Enabled
>>> Web Server    Enabled
>>> TELNET        Enabled
>>> 
>>> 
>>> 
>>> 
>>>> Is the Brother printer configured to only support IPv6?
>>>> 
>>>> On Mar 24, 2012, at 2:11 PM, willie <tumbleweed at fast-mail.org> wrote:
>>>> 
>>>>> 
>>>>> Hello folks,
>>>>> 
>>>>> I wouldn't know if this is a bug or not but I'd sure like to understand what's happening.
>>>>> 
>>>>> I'm running linux 3.2.12/cups 1.5.2.
>>>>> 
>>>>> Since disabling the ip6 stack with kernel argument "ipv6.disable=1", cups fails to discover network printers on the cups server web page (localhost:631). If I remove that kernel line parameter and reinstate ip6, all is well again.
>>>>> 
>>>>> I've failed to find any info out there to suggest that cups *depends* on ipv6.
>>>>> 
>>>>> I use static IP addressing and the problem occurs with both wired and wireless networking.
>>>>> 
>>>>> (If it's relevant, one printer that's no longer discovered without an ipv6 stack is a Brother HL-5250dn.)
>>>>> 
>>>>> Can anyone help?
>>>>> 
>>>>> Thanks.
>>>>> _______________________________________________
>>>>> cups mailing list
>>>>> cups at easysw.com
>>>>> http://lists.easysw.com/mailman/listinfo/cups
>>>> 
>>>> __________________________________________________
>>>> Michael Sweet, Senior Printing System Engineer, PWG Chair
>>>> 
>>> 
>>> _______________________________________________
>>> cups mailing list
>>> cups at easysw.com
>>> http://lists.easysw.com/mailman/listinfo/cups
>> 
>> ________________________________________________________________________
>> Michael Sweet, Senior Printing System Engineer, PWG Chair
>> 
> 
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__________________________________________________
Michael Sweet, Senior Printing System Engineer, PWG Chair





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