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    Wake on LAN over different VLANS

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    • S
      szecca1 @Tom Elliott
      last edited by

      @Tom-Elliott I apologize in advance but where would I get this broadcast ip? Would this be the gateway ip from each building? I’m not sure where to pull this broadcast IP from?

      Wayne WorkmanW 1 Reply Last reply Reply Quote 0
      • Wayne WorkmanW
        Wayne Workman @szecca1
        last edited by Wayne Workman

        @szecca1

        You basically jot down any valid IP for a network, then jot down your subnet mask.

        Convert both to binary, with each of the four octets separated by a decimal as normal.

        Then, for each ‘0’ in the subnet mask, you’d flip that to a 1, but you’d still use the network portion of the valid IP, those binary bits would just “fall through”

        So… example time…

        Subnet mask: 255.255.240.0

        IP 10.2.3.8

        Binary IP Subnet:

        00001010.00000010.00000011.00001000
        11111111.11111111.11110000.00000000

        (Client IP network portion: 00001010.00000010.0000 Client portion: 0011.00001000)

        the fall through numbers for the network address:
        00001010.00000010.0000000.00000000 (Where 1 is set in the subnet mask, binary from the client ‘fall through’ to form a network address)
        This gives us a network address of 10.2.0.0

        The broadcast address is the network address combined with all-on client bits.
        00001010.00000010.00001111.11111111
        (binary in the subnet mask set to ‘0’ ‘fall through’ to the broadcast address as ‘1’)

        Convert to decimal: 10.2.15.255

        So, 10.2.15.255 would be the broadcast address for that IP and that subnet mask.

        And, that’s correct, that’s my particular building’s broadcast address.

        Please help us build the FOG community with everyone involved. It's not just about coding - way more we need people to test things, update documentation and most importantly work on uniting the community of people enjoying and working on FOG!
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        • S
          szecca1 @Wayne Workman
          last edited by

          @Wayne-Workman The 10.2.3.8 address that you used in your example, where did you get that from? Is that just a random IP of a client in the 10.2 VLAN or is that something in particular?

          Wayne WorkmanW 1 Reply Last reply Reply Quote 0
          • Wayne WorkmanW
            Wayne Workman @szecca1
            last edited by Wayne Workman

            @szecca1 It’s a random (but valid) IP for my network.

            Also, don’t think of it as a V-LAN… that’s not correct. Think of a “network” as a broadcast domain, or a subnet.

            V-LANs came along WAY after the specs for TCP/IP and routing were developed. V-LANS are just a way to logically separate traffic within the same device.

            V-Lans have just numbers assigned… I.E. 5, 6, 7, 8, 55, 56, and so on.

            Networks have a network address, and a broadcast address and a valid range (hence ‘broadcast domain’). If you have subnetted networks, then I SUPPOSE its ok to call them subnets… but I won’t call them that lol.

            Please help us build the FOG community with everyone involved. It's not just about coding - way more we need people to test things, update documentation and most importantly work on uniting the community of people enjoying and working on FOG!
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            • S
              szecca1 @Wayne Workman
              last edited by

              @Wayne-Workman Ok I am stuck using your example so I pulled a random IP from my high school.
              Subnet mask: 255.255.0.0
              IP: 10.2.1.64

              Binary IP Subnet:

              00001010.00000010.00000001.01000000
              11111111.11111111.00000000.00000000

              (Client IP network portion: 00001010.00000010.0000 Client portion: 0001.01000000)

              Which the fall through for the network address if I am correct would be:
              00001010.00000010.00000000.00000000
              which give a network address of 10.2.0.0

              After that I am not sure where to go as I get confused by what you did.

              Wayne WorkmanW 1 Reply Last reply Reply Quote 0
              • Wayne WorkmanW
                Wayne Workman @szecca1
                last edited by Wayne Workman

                @szecca1 said:

                @Wayne-Workman Ok I am stuck using your example so I pulled a random IP from my high school.
                Subnet mask: 255.255.0.0
                IP: 10.2.1.64

                Binary IP Subnet:

                00001010.00000010.00000001.01000000
                11111111.11111111.00000000.00000000

                (Client IP network portion: 00001010.00000010.0000 Client portion: 0001.01000000)

                Which the fall through for the network address if I am correct would be:
                00001010.00000010.00000000.00000000
                which give a network address of 10.2.0.0

                After that I am not sure where to go as I get confused by what you did.

                IP: 00001010.00000010.00000001.01000000
                Subnet: 11111111.11111111.00000000.00000000
                (only where there is a 1 for subnet, the IP address portion falls through)
                Fall through: 00001010.00000010.00000000.00000000 <-- your network address

                To get the broadcast, turn on all the client portion ‘bits’ where the subnet mask is 0.

                00001010.00000010.11111111.11111111 <-- your broadcast address 10.2.255.255

                Please help us build the FOG community with everyone involved. It's not just about coding - way more we need people to test things, update documentation and most importantly work on uniting the community of people enjoying and working on FOG!
                Daily Clean Installation Results:
                https://fogtesting.fogproject.us/
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                https://fog-external-reporting-results.fogproject.us/

                S 1 Reply Last reply Reply Quote 0
                • S
                  szecca1 @Wayne Workman
                  last edited by

                  @Wayne-Workman And that broadcast address should allow me to run the wake on lan to the high school which is where that IP came from?

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                  • Wayne WorkmanW
                    Wayne Workman @szecca1
                    last edited by

                    @szecca1 said:

                    @Wayne-Workman And that broadcast address should allow me to run the wake on lan to the high school which is where that IP came from?

                    It should. Test it and report back? I am not using the plugin yet so I don’t know, but if Tom says that’s how it is, then 99.9% of the time, that’s how it is.

                    Please help us build the FOG community with everyone involved. It's not just about coding - way more we need people to test things, update documentation and most importantly work on uniting the community of people enjoying and working on FOG!
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                    • S
                      szecca1 @Wayne Workman
                      last edited by

                      @Wayne-Workman Capture.PNG

                      This is what I entered into that plugin creating it for my high school and just tested it and didnt work.

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                      • Tom ElliottT
                        Tom Elliott
                        last edited by

                        You likely need to allow udp-broadcast-forwarding on your switches. At the very least, it needs to be enabled for the routing switch. The way to do this varies depending on the switch. HP Procurve allows for udp-broadcast-forwarding on (I think)

                        Please help us build the FOG community with everyone involved. It's not just about coding - way more we need people to test things, update documentation and most importantly work on uniting the community of people enjoying and working on FOG! Get in contact with me (chat bubble in the top right corner) if you want to join in.

                        Web GUI issue? Please check apache error (debian/ubuntu: /var/log/apache2/error.log, centos/fedora/rhel: /var/log/httpd/error_log) and php-fpm log (/var/log/php*-fpm.log)

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                        S 1 Reply Last reply Reply Quote 1
                        • S
                          szecca1 @Tom Elliott
                          last edited by

                          @Tom-Elliott We already did that thinking it was a switch problem before doing this plug in

                          Tom ElliottT 1 Reply Last reply Reply Quote 0
                          • Tom ElliottT
                            Tom Elliott @szecca1
                            last edited by

                            @szecca1 are you 100% sure that 10.2.255.255 is that networks broadcast address?

                            Please help us build the FOG community with everyone involved. It's not just about coding - way more we need people to test things, update documentation and most importantly work on uniting the community of people enjoying and working on FOG! Get in contact with me (chat bubble in the top right corner) if you want to join in.

                            Web GUI issue? Please check apache error (debian/ubuntu: /var/log/apache2/error.log, centos/fedora/rhel: /var/log/httpd/error_log) and php-fpm log (/var/log/php*-fpm.log)

                            Please support FOG if you like it: https://wiki.fogproject.org/wiki/index.php/Support_FOG

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                            • S
                              szecca1 @Tom Elliott
                              last edited by

                              @Tom-Elliott I worked with @Wayne-Workman and he helped me figure that out by converting an IP address into that. Previous posts go through it and thats what we came to the conclusion it is.

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                              • Tom ElliottT
                                Tom Elliott
                                last edited by

                                What is the subnet mask of your network? Class A, B, C?

                                Please help us build the FOG community with everyone involved. It's not just about coding - way more we need people to test things, update documentation and most importantly work on uniting the community of people enjoying and working on FOG! Get in contact with me (chat bubble in the top right corner) if you want to join in.

                                Web GUI issue? Please check apache error (debian/ubuntu: /var/log/apache2/error.log, centos/fedora/rhel: /var/log/httpd/error_log) and php-fpm log (/var/log/php*-fpm.log)

                                Please support FOG if you like it: https://wiki.fogproject.org/wiki/index.php/Support_FOG

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                                • S
                                  szecca1 @Tom Elliott
                                  last edited by

                                  @Tom-Elliott Subnet mask is 255.255.0.0, class B

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                                  • Wayne WorkmanW
                                    Wayne Workman @Tom Elliott
                                    last edited by

                                    @Tom-Elliott said:

                                    @szecca1 are you 100% sure that 10.2.255.255 is that networks broadcast address?

                                    If the info he gave me is correct, I can assure that what we came up with is correct, but feel free to doublecheck my work using third party tools: http://www.subnetonline.com/pages/subnet-calculators/ip-subnet-calculator.php

                                    Please help us build the FOG community with everyone involved. It's not just about coding - way more we need people to test things, update documentation and most importantly work on uniting the community of people enjoying and working on FOG!
                                    Daily Clean Installation Results:
                                    https://fogtesting.fogproject.us/
                                    FOG Reporting:
                                    https://fog-external-reporting-results.fogproject.us/

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                                    • S
                                      szecca1 @Wayne Workman
                                      last edited by

                                      @Wayne-Workman As long as all you needed was a random IP address and the subnet that info is correct. The only thing weird is the website you sent is saying we are a class A even though we are a class B.

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                                      • Tom ElliottT
                                        Tom Elliott
                                        last edited by

                                        That’s often the case class a class B classy are usually directed by the first octet one through 126.whatever is considered class a, 128.whatever through 191.whatever is considered class b,192 up is class c

                                        Please help us build the FOG community with everyone involved. It's not just about coding - way more we need people to test things, update documentation and most importantly work on uniting the community of people enjoying and working on FOG! Get in contact with me (chat bubble in the top right corner) if you want to join in.

                                        Web GUI issue? Please check apache error (debian/ubuntu: /var/log/apache2/error.log, centos/fedora/rhel: /var/log/httpd/error_log) and php-fpm log (/var/log/php*-fpm.log)

                                        Please support FOG if you like it: https://wiki.fogproject.org/wiki/index.php/Support_FOG

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                                        • S
                                          szecca1 @Tom Elliott
                                          last edited by

                                          @Tom-Elliott ok that makes sense, and I ran another test and still wake on lan is not working. At this point I am not sure what to do. The imaging works perfectly but the clients have to be on in order for the imaging to go through, obviously.

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                                          • Wayne WorkmanW
                                            Wayne Workman
                                            last edited by Wayne Workman

                                            Your public IP might be a Class B address…

                                            But internally, you have Class A addressing via NAT.

                                            Please help us build the FOG community with everyone involved. It's not just about coding - way more we need people to test things, update documentation and most importantly work on uniting the community of people enjoying and working on FOG!
                                            Daily Clean Installation Results:
                                            https://fogtesting.fogproject.us/
                                            FOG Reporting:
                                            https://fog-external-reporting-results.fogproject.us/

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