Printers sending out ARP requests
I have several printers sending our ARP broadcasts and for the life of me i cant see why. Would SNMP do this?
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i thougth i was clear : test them on a different network (setup 1 pc with networked printers) to be sure it does not come from the network itself. so your 2nd assumption is correct :"just plug them into a seperate switch (not connected to the current network) and run the sniffer?"
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Just wanted to make sure.
Are you using DHCP or fixed IPs?
I always prefer to set fixed IPs for printers, and print via Standard TCP/IP ports, thus avoiding name resolution problems, etc.
Also, if you are not using routing internally, you do not need a gateway on the printer.
Set the printer's gateway to 127.0.0.1 (loopback), and remove the DNS servers, unless you need them for name resolution by the printer itself.(for example if it is a scanner, IPP printing is in use, etc.)
Of course, this may not be viable for you, as I don't know anything about your network.
Some SNMP based proprietary ports can cause ARP broadcasts.
I always prefer to set fixed IPs for printers, and print via Standard TCP/IP ports, thus avoiding name resolution problems, etc.
Also, if you are not using routing internally, you do not need a gateway on the printer.
Set the printer's gateway to 127.0.0.1 (loopback), and remove the DNS servers, unless you need them for name resolution by the printer itself.(for example if it is a scanner, IPP printing is in use, etc.)
Of course, this may not be viable for you, as I don't know anything about your network.
Some SNMP based proprietary ports can cause ARP broadcasts.
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We have all printers set to use a static ip. I will try to remove all the SNMP protocols since we dont use it and see if that fixes it. If not then i will try to remove the gateway and DNS servers.
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I noticed that several printers had SNMP enabled. Some of them we have to keep on since it is needed by some of the printer software to get configuration settings from the printer. I am trying to get some time to put some of the printers on a seperate network and see what happens.
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We have several Toshiba copier/printers. I've taken off IPX, apple talk, dlc/llc, etc on all of the printers as well as taking off bootp, dhcp. We have about 100 printers and i am going to go through all of them via the web browser and double check since i did several of them through telnet many moons ago. If they dont support web then i will go through telnet again. we have a DHCP scope of 192.168.0.1-192.168.1.254,
I would look at the Toshibas first. They run Linux (unless they have Fiery controllers, when they may run linux or windows 2K,XP or Linux)
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A few of them do have the fiery controller.
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Since i have so many printers i am going to be using all of your advice but it may take some time. I hope you all don't mind the way i split the points since each of you had valid points. thanks again.
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nobus,
When you say seperate network do you want me to give them a different IP address and connect them to a seperate switch? Or just plug them into a seperate switch (not connected to the current network) and run the sniffer?