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    VLANs, What am I doing wrong?

    Scheduled Pinned Locked Moved L2/Switching/VLANs
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    • M
      marvosa @johnpoz
      last edited by marvosa

      Agreed. If you're essentially going to allow all VLANs, I would just remove the switchport trunk allowed command altogether.

      Although, best practice is to only allow the VLANs that are in use over the trunk.

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      • A
        Apathia @johnpoz
        last edited by Apathia

        @johnpoz I think I get it now. LAN2/RE1 is on the physical interface so it's "untagged". The switch throws this on VLAN1 as that's the default VLAN for anything without a tag?

        So essentially, the switch acts as if every packet is tagged, either explicitly or not. Non-explicit packets are thrown on the Native VLAN?

        If that's what it means then that does make sense. I also only used sw tr all vlan all because I was initially having issues with adding specific VLANs although that may have been due to having g0/2 misconfigured as access instead of trunk.

        Now that I have VLANs working, my AP is working just fine and assigning devices to the correct subnets.

        Thanks for all the help!

        My current config, btw:

        cisco#show running-config int g0/2
        Building configuration...
        
        Current configuration : 159 bytes
        !
        interface GigabitEthernet0/2
         description "rooter"
         switchport trunk encapsulation dot1q
         switchport trunk allowed vlan 10,20,99
         switchport mode trunk
        end
        
        cisco#show running-config int f0/2
        Building configuration...
        
        Current configuration : 154 bytes
        !
        interface FastEthernet0/2
         description "Wlan"
         switchport trunk encapsulation dot1q
         switchport trunk allowed vlan 10,20,99
         switchport mode trunk
        end
        
        
        johnpozJ 1 Reply Last reply Reply Quote 0
        • johnpozJ
          johnpoz LAYER 8 Global Moderator @Apathia
          last edited by

          Yeah that looks better.. And is fine if your using vlan 1 as native.

          I don't personally use vlan 1, this is habit from corp experience where vlan 1 is always disabled. And management lan is set to some other vlan.

          But there is really nothing technically wrong with doing that. But if your going to say at some point connect your other port into the same physical switch.. And run a network on the physical port along with vlans as well on that other port.

          You will need to understand how to change the native vlan on a trunk port, along with also understanding what pvid is. This where you set what vlan a switch puts untagged traffic into when it sees ingress into the port.

          Your old school cisco for sure can help you with understanding these concept. Cisco terms might be a bit different than other makers.. In general if you know what a tag or untagged vlan, and how the switch handles ingress traffic without a tag you will be cooking with gas ;)

          Glad you finally got it working how you want.

          For your next assignment ;) If you choose to accept it ;)

          Figure out how to put your AP management IP onto a tagged vlan..
          And how to change your native vlan g2 to something other than vlan1..

          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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          • A
            Apathia @johnpoz
            last edited by Apathia

            @johnpoz:

            Figure out how to put your AP management IP onto a tagged vlan..

            You mean this?
            43d9efc2-fbd6-4525-8376-c7d1e2dff7bc-image.png

            It was why I created the MGMT VLAN in the first place lol.. Once I figured out how to actually get the VLANs across the switch, the rest was relatively easy. Took me a bit to figure out why the AP would keep going offline when I switched it to the MGMT VLAN but I quickly clued into the PFSense rules, which again is what my plan was in the first place.

            And how to change your native vlan g2 to something other than vlan1..

            cisco#show running-config int g0/2
            Building configuration...
            
            Current configuration : 191 bytes
            !
            interface GigabitEthernet0/2
             description "rooter"
             switchport trunk encapsulation dot1q
             switchport trunk native vlan 2
             switchport trunk allowed vlan 10,20,99
             switchport mode trunk
            end
            
            cisco#
            
            johnpozJ JKnottJ 2 Replies Last reply Reply Quote 0
            • johnpozJ
              johnpoz LAYER 8 Global Moderator @Apathia
              last edited by johnpoz

              Do you have a vlan 2? Did you create one? ;)

              Or just copy that command from my example ;)

              But see how fast it clicks into place once you get what tagged and untagged mean.

              Welcome to the world of vlans! Now you just need a switch that isn't 20 years old, and does gig on all its ports ;) I would go insane with 100mbps.. Be like watching paint dry trying to move files around.. Gig is even a bottleneck, I connected my pc to my nas via 2.5gbps so could move the files back and forth when I work on them.. ;)

              But that switch is great for a lab.. How much juice does it draw? You might not want to leave it on 24/7 - those old things use to suck up some juice for sure.. 100w?

              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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              • A
                Apathia @johnpoz
                last edited by

                @johnpoz
                I do now:
                14f72a5b-371a-4e84-a445-cea230f3eb59-image.png
                f0d74afe-0db7-412b-ab86-f37c5d6db045-image.png

                This I presume means that if I enable another port on the cisco, remove it from the BlackHole VLAN, and plug something in then it'll default to VLAN 2?

                RE2/LAN is connected to an HP 2920-24G-PoE+ Switch. Not new, but not 10/100 either. This is what I use as my main network. I plan on getting VLANs set up on it too, but I also don't want to accidentally take myself offline when I mess things up so I want a decent handle on VLANs before I do anything with it. My "file server" is currently my media center PC so I don't have to worry about network transfer speeds too much as I play everything off it anyway. I do have an actual server (Intel something, can't remember which), but that thing not only sounds like a jet engine, but it also drastically increases my electric bill.

                I don't think either of the switches suck up much juice, the HP switch is currently reporting ~10W from 3 POE devices connected to it so I can't imagine it's too much. Last months electricity bill was surprisingly on par with the previous years, despite me now working from home and having these two switches. I will say though, the Cisco is whisper quiet compared to the HP.

                I might eventually chain the switches, Router --> HP --> Cisco, but I want to get a good handle on the VLANs and configuring things before doing that.

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

                  Does your HP also do vlans? If not I would do it that way I would do

                  router - cisco - hp

                  You can put a dumb switch downstream of a smart switch, and just everything on that dumb switch will just be 1 vlan.

                  What specific models of these switches? Can look up watch the cisco pulls. Is it 2950T-24, those are not all that bad only 30W max..

                  edit:
                  What do you want that rule to do? Your only going to be able to go to wan net, that doesn't allow you to do really anything.. Your not even allowing that network to query pfsense for dns.

                  wan net is not the internet, its just the network your wan is attached to..

                  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

                  A 1 Reply Last reply Reply Quote 0
                  • JKnottJ
                    JKnott @Apathia
                    last edited by

                    @apathia

                    Is that a Unifi AP? If so, you can select an interface or VLAN when you configure it, though you can also move between one or the other later, as I had to do recently, when my pfsense firewall died. On my AP, the management interface is on my main LAN.

                    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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                    • A
                      Apathia @johnpoz
                      last edited by

                      @johnpoz It's a WS-C3560-24PS-E, so looks like it it's 400+ W. The HP is an J9727A 2920-24G-PoE+ Switch, so it's also a managed switch. I think combined, they pull 800W max/

                      My goal with that rule was to restrict traffic, I was lazy and didn't want to add a separate rule restricting to the different VLANs but I guess that's not a thing.

                      @JKnott Yeah it is, I initially had it set up with defaults but now that I have a management VLAN, I've been moving appropriate devices over to it.

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

                        Well power MAX can for sure be misleading..

                        Great device to add to your tool belt, if you have any care to what devices draw.. Is a kill-a-watt meter..

                        Or a smart plug with power reading.. So you can plug a device in, and see what it actually draws.. Say leave it on the plug for 24 hours min.. And try and atleast use it a bit like you think you normally would..

                        Cost of elect can vary quite a bit.. But at the national average of like 12cents per kwh.. A 100W will cost you 100 Bucks a year. Not counting delivery cost of the elect as well, and taxes on that etc.. so going to be 100+ a year to run something that sucks 100w if left on 24/7/365

                        I have gotten pretty into how much something draws, even before I went solar.. So Im the blue line - guess when I went solar ;)

                        electric.png

                        I always use to be above even my non efficient neighbors (all the networking/computer toys) ;) The part I like the most is where I am under the 0... This is where I produced more than I used.. Which is the goal..

                        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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