Need some advice on learning networking

[BillyCarpenter]

Re: Need some advice on learning networking

Yes but some Enterprise clients can reserve an IPaddress using a dhcp reservation using the MAC address of the NIC card in that case you would leave it on DHCP and the machine would always get the same ipaddress

Credit where credit is due. You know your stuff. In the video I was watching, they mentioned that DHCP can be set up with reserved IP addresses. They didn't explain how it worked. It's good to know that the MAC address is used and it makes sense. Thank you for that info.

[BillyCarpenter]

Re: Need some advice on learning networking

DHCP is fine as long as the customer has IT Support to do a good DHCP reservation for that device. Some companies I have helped have ALL of their devices DHCP but keep a very detailed DHCP reservation list. Otherwise I would always recommend static especially if they have no IT Support.

Thanks for sharing.

[slimslob]

Re: Need some advice on learning networking

I think I understand. I watched a video on YouTube and here's the way he explained it:

If the DHCP range is 192.168.1.0 -- 192.168.1.254, when a computer is placed on the network for the first time, the DHCP server will assign it a network address at the lowest end of the range. In this case the IP address would be 192.168.1.0. The next device installed on the network would have an IP address of 192.168.1.1. In other words, it just counts up from the beginning of the DHCP range.

In conclusion, if the DHCP server does not limit the DHCP range, you need to make sure the IP address of the copier is at the upper end of the DHCP range in order to avoid any IP conflicts.

I think I have that right.

Most quality network installers never use the entire subnet range for DHCP. 255 devices on the same subnet can get a little awkward and lead to collisions and slow throughput. Most router DHCP usually allocate 100 addresses at most but do not always use the same range. If you can login to the router check what that range. You can the go either 50 above the highest oy 50 below the lowest. Just remember, there may be other devices with fixed IP Addresses.

If you are using a computer that is a member of the same workgroup/domain as the rest of the network, you can open a command prompt and type NET VIEW to see a list of all addresses in use.

[BillyCarpenter]

Re: Need some advice on learning networking

Most quality network installers never use the entire subnet range for DHCP. 255 devices on the same subnet can get a little awkward and lead to collisions and slow throughput. Most router DHCP usually allocate 100 addresses at most but do not always use the same range. If you can login to the router check what that range. You can the go either 50 above the highest oy 50 below the lowest. Just remember, there may be other devices with fixed IP Addresses.

If you are using a computer that is a member of the same workgroup/domain as the rest of the network, you can open a command prompt and type NET VIEW to see a list of all addresses in use.

I ran Net View and all it showed me was the name of the computer I am on.

[slimslob]

Re: Need some advice on learning networking

Credit where credit is due. You know your stuff. In the video I was watching, they mentioned that DHCP can be set up with reserved IP addresses. They didn't explain how it worked. It's good to know that the MAC address is used and it makes sense. Thank you for that info.

With most router DHCP reservations are very easy to do as long as you can login to the router. Somewhere in the DHCP setting will be a setting for DHCL Reservations. If the device you wish to make a reservation for is already connected DHCP, it will be listed with a check box next to it. Click on the check box. Try it with your browser at home.

[slimslob]

Re: Need some advice on learning networking

I ran Net View and all it showed me was the name of the computer I am on.

Then yours is the only in the workgroup.

[tsbservice]

Re: Need some advice on learning networking

Yes but some Enterprise clients can reserve an IPaddress using a dhcp reservation using the MAC address of the NIC card in that case you would leave it on DHCP and the machine would always get the same ipaddress

Was about to say the same.

Interesting story. I was at customers yesterday to update some Bizhubs firmware. First machine everything went good instead after update machine IP address went to 169.x.x.x range. They have all machines IPs reserved using the MAC address so it was quite strange. Turned out being machine model specific firmware during update change the MAC to 12 zeroes and switch security blocks this port.
Anyway it was my bad as i was leaving network plugged in. Next few machines didn't have such a trouble as i unplugged network before update. They have another models(another firmware to update) and as per test i leaved network plugged, no problems with blocked ports at all. Weird but good lesson for me. Never forget to unplug network before repairs or FW update.

[BillyCarpenter]

Re: Need some advice on learning networking

Then yours is the only in the workgroup.

Sorry, I misunderstood. I thought it would show me the IP address for everything on my network. I must have 30 different devices on my network and all Net View showed my was the name of the computer I was on.

I use Advanced IP Scanner to see all the IP addresses used on the network. Is there any way to look at that using Command Prompt?

[BillyCarpenter]

Re: Need some advice on learning networking

Was about to say the same.

Interesting story. I was at customers yesterday to update some Bizhubs firmware. First machine everything went good instead after update machine IP address went to 169.x.x.x range. They have all machines IPs reserved using the MAC address so it was quite strange. Turned out being machine model specific firmware during update change the MAC to 12 zeroes and switch security blocks this port.
Anyway it was my bad as i was leaving network plugged in. Next few machines didn't have such a trouble as i unplugged network before update. They have another models(another firmware to update) and as per test i leaved network plugged, no problems with blocked ports at all. Weird but good lesson for me. Never forget to unplug network before repairs or FW update.

Very interesting. I would have been at a loss. How did you figure out to unplug the machine from the network to correct the problem?

[bsm2]

Re: Need some advice on learning networking

Very interesting. I would have been at a loss. How did you figure out to unplug the machine from the network to correct the problem?

Disconnect the network cable is SOP for firmware updates with most copier companies.

[BillyCarpenter]

Re: Need some advice on learning networking

Disconnect the network cable is SOP for firmware updates with most copier companies.

I had no idea. I don't remember seeing that in the manual. But will unplug from now on. Thanks.

[tsbservice]

Re: Need some advice on learning networking

Very interesting. I would have been at a loss. How did you figure out to unplug the machine from the network to correct the problem?

At first machine network port has no lights. Secondly we together with their IT plugged machine in another wall network port with long enough cable and machines linked in. Then IT called someone to check if switch port is down...they had in switch log 12 zeroes MAC. So it's basically 1+2+3...nobody has magic wand.

[slimslob]

Re: Need some advice on learning networking

Disconnect the network cable is SOP for firmware updates with most copier companies.

Ricoh recommends disconnecting the network cable and the phone line if the MFP has a FAX option installed.

[tsbservice]

Re: Need some advice on learning networking

Ricoh recommends disconnecting the network cable and the phone line if the MFP has a FAX option installed.

Konica Minolta manuals I have read never mention that network cable should be disconnect prior FW update.

[DFM914]

Re: Need some advice on learning networking

Just do as many installs as you can in different network environments, you will learn a ton over time.