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    /30 network - This IPv4 address is the network address

    Scheduled Pinned Locked Moved L2/Switching/VLANs
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    • johnpozJ
      johnpoz LAYER 8 Global Moderator @admin_axx
      last edited by

      @admin_axx set your address to .241 vs .240, .240 is the wire/network if you set an address of .241/30 you are on the .240/30 network.

      An intelligent man is sometimes forced to be drunk to spend time with his fools
      If you get confused: Listen to the Music Play
      Please don't Chat/PM me for help, unless mod related
      SG-4860 24.11 | Lab VMs 2.8, 24.11

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      • JKnottJ
        JKnott @mcury
        last edited by

        @mcury

        Actually, for a point to point link, even a /31 should be valid.

        PfSense running on Qotom mini PC
        i5 CPU, 4 GB memory, 32 GB SSD & 4 Intel Gb Ethernet ports.
        UniFi AC-Lite access point

        I haven't lost my mind. It's around here...somewhere...

        M 1 Reply Last reply Reply Quote 1
        • M
          mcury Rebel Alliance @JKnott
          last edited by

          @JKnott said in /30 network - This IPv4 address is the network address:

          Actually, for a point to point link, even a /31 should be valid.

          I think only TNSR works with /31, please correct me if I'm wrong about this.
          If not, we could ask for a feature request, it will save some IPs for p2p links.

          dead on arrival, nowhere to be found.

          Bob.DigB johnpozJ JKnottJ 3 Replies Last reply Reply Quote 0
          • Bob.DigB
            Bob.Dig LAYER 8 @mcury
            last edited by Bob.Dig

            @mcury said in /30 network - This IPv4 address is the network address:

            I think only TNSR works with /31, please correct me if I'm wrong about this.

            pfSense does work too, at least with WireGuard. But no one else does, so I wouldn't do it.

            JKnottJ 1 Reply Last reply Reply Quote 0
            • johnpozJ
              johnpoz LAYER 8 Global Moderator @mcury
              last edited by

              @mcury said in /30 network - This IPv4 address is the network address:

              it will save some IPs for p2p links.

              why would it matter if your just using rfc1918?

              An intelligent man is sometimes forced to be drunk to spend time with his fools
              If you get confused: Listen to the Music Play
              Please don't Chat/PM me for help, unless mod related
              SG-4860 24.11 | Lab VMs 2.8, 24.11

              M 1 Reply Last reply Reply Quote 0
              • M
                mcury Rebel Alliance @johnpoz
                last edited by

                @johnpoz said in /30 network - This IPv4 address is the network address:

                why would it matter if your just using rfc1918?

                Easier to organize..
                I have a lot of ipsec tunnels in a hub and spoke that would be easier to manage, but yes, I don't think it's really necessary, or worth the open of a FR.

                dead on arrival, nowhere to be found.

                johnpozJ 1 Reply Last reply Reply Quote 0
                • johnpozJ
                  johnpoz LAYER 8 Global Moderator @mcury
                  last edited by johnpoz

                  @mcury assign a /24 for your tunnels and that gives you 64 /30s, or use a /23 ;) that is a lot of tunnels hehehe

                  An intelligent man is sometimes forced to be drunk to spend time with his fools
                  If you get confused: Listen to the Music Play
                  Please don't Chat/PM me for help, unless mod related
                  SG-4860 24.11 | Lab VMs 2.8, 24.11

                  M 1 Reply Last reply Reply Quote 1
                  • M
                    mcury Rebel Alliance @johnpoz
                    last edited by

                    @johnpoz said in /30 network - This IPv4 address is the network address:

                    assign a /24 for your tunnels and that gives you 64 /30s, or use a /23 ;)

                    you are right :) absolutely not necessary..

                    dead on arrival, nowhere to be found.

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                    • JKnottJ
                      JKnott @mcury
                      last edited by

                      @mcury said in /30 network - This IPv4 address is the network address:

                      I think only TNSR works with /31

                      I don't know about pfSense, but it certainly works with Linux & Cisco. IIRC, Windows still chokes on it though. On point to point links you don't need a broadcast or network address. In fact, you can get by with as little and the interface of the link.

                      PfSense running on Qotom mini PC
                      i5 CPU, 4 GB memory, 32 GB SSD & 4 Intel Gb Ethernet ports.
                      UniFi AC-Lite access point

                      I haven't lost my mind. It's around here...somewhere...

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                      • JKnottJ
                        JKnott @Bob.Dig
                        last edited by

                        @Bob-Dig said in /30 network - This IPv4 address is the network address:

                        But no one else does

                        Linux & Cisco do.

                        PfSense running on Qotom mini PC
                        i5 CPU, 4 GB memory, 32 GB SSD & 4 Intel Gb Ethernet ports.
                        UniFi AC-Lite access point

                        I haven't lost my mind. It's around here...somewhere...

                        johnpozJ Bob.DigB 2 Replies Last reply Reply Quote 0
                        • johnpozJ
                          johnpoz LAYER 8 Global Moderator @JKnott
                          last edited by

                          @JKnott /31 can make sense if you have limited amount of public IPs - but seems pretty pointless to worry about it if your using rfc1918 for them..

                          Who cares if you loose 2 IPs when you create a /30 when its rfc1918..

                          An intelligent man is sometimes forced to be drunk to spend time with his fools
                          If you get confused: Listen to the Music Play
                          Please don't Chat/PM me for help, unless mod related
                          SG-4860 24.11 | Lab VMs 2.8, 24.11

                          1 Reply Last reply Reply Quote 0
                          • Bob.DigB
                            Bob.Dig LAYER 8 @JKnott
                            last edited by

                            @JKnott said in /30 network - This IPv4 address is the network address:

                            Linux & Cisco do.

                            I had no luck with that on Debian but maybe I did something wrong. And I did not try elsewhere so you are most probably right. 😉

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