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MomForLife
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Printers - Static vs using DHCP

I have never used DHCP.  However I have looked at this company who does.  They have their printers on DHCP rather than static.  Won't this create a problem when installing this printers.  If you use the IP to connect and the lease runs out and they are assigned a new ip, wont the printers stop working?
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MomForLife

8/22/2022 - Mon
ASKER CERTIFIED SOLUTION
CompProbSolv

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Predrag Jovic

Typically if DHCP is used for assigning IP addresses to printers it is combined with DHCP reservation  (binding MAC address or DeviceID to IP address), in that case printers will always get the same IP addresses. Otherwise, it is not considered good idea to use DHCP for printers without reservation.
MomForLife

ASKER
Okay.  I thought this might be the best solution.    Is there a default setting under DHCP that tells DHCP how long to keep the leases?
MomForLife

ASKER
When I reserve the address, do i have to restart DHCP?
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William Peck
CompProbSolv

I wouldn't expect you to need to restart the DHCP server, but that may depend on what you are using for it.

Your DHCP server will have a setting for how long to keep leases.  There are tradeoffs for having them too long or too short.  Unless you have a lot of temporary devices, setting it to 7 days is reasonable.
Predrag Jovic

Typically you do not have to restart DHCP. If you change IP address reservation you need to force device to renew IP address, so device can get the new IP address (reserved IP address), otherwise there is nothing to do.
If you create DHCP reservation - it is considered permanent (at least on DHCP server side) since that address will not be assigned to any other device, and for device that is getting IP address from DHCP server it is default lease time from server.
MomForLife

ASKER
Having a hard time giving my points out.  Do you guys mind if I split it between the two of you?
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Predrag Jovic

For me, whatever you do it is OK. :)
MomForLife

ASKER
Thanks.  I will divide it.  Thanks so much, you both were very helpful.
MomForLife

ASKER
Ok.  Clicked on assisted solution, but I can't seem to close this question.  Sorry for the trouble.  Anyone know how I can close this?
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Predrag Jovic

I have no idea.
I guess you need to choose Solution and Assisted solution (something like that).
MomForLife

ASKER
I did.  I chose assisted solution.  Oh well will figure it out tomorrow.  Going to bed.  Thanks, again.
Predrag Jovic

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John

Just for added information - I have often had issues using DHCP for printers and I only use Static IP for printers. I use DHCP for workstations, of course, but Printers always Static.
Akinsd

Since no one mentioned this, an added advantage of using dynamic DHCP and DHCP reservation (in place of static) is the ease of network redesign. You can change, expand or shrink your subnets easily and role out new addresses for all devices as opposed to identifying devices and re-configuring the IPs on them. Imaging 1 person having to manually re-engineer a network with 100 static IPs.

Lastly, it's a matter of preference. Every option has both advantage and disadvantage bundled together.
MomForLife

ASKER
John >  That's what I would have done.  I am checking this companies printers, computers, etc.  as a favor to a friend.  The person whom they hired set up some printers with DHCP but  to never release the ip.  I have another with DHCP with manual ip,  They all have an IP assigned to them even though they have DHCP turned on.  It doesn't make sens to me.  I didn't change their setup, but I added a few to the reservation area in DHCP.  Any input about this?
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William Peck
John

If you have a large DHCP scope and a large number of printers, DHCP reservations should work.

In my clients, there is a small number of printers and a static DHCP scope so we use static IP for printer.

I have a DHCP reservation for my own computer there as I need to be able to send email differently. That reservation works and no harm using it. (I am one of the admins at this client)
MomForLife

ASKER
On the printer that  shows manual, I am getting an error when I enter it in DHCP reservations, but it still allows it.  Should this one be done differently.  Maybe I need to change my range so that DHCP wont try to grab this ip and then we have two devices with the same ip
MomForLife

ASKER
Should I start this as another question?
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John

On the printers I manage, the printer network settings (right on the printer) permit Static IP plus Subnet Mask and Gateway or DHCP.
MomForLife

ASKER
Thanks John.