Netgate Discussion Forum
    • Categories
    • Recent
    • Tags
    • Popular
    • Users
    • Search
    • Register
    • Login

    No DHCP on pfSense VLAN with Cisco Smart Switch

    Scheduled Pinned Locked Moved L2/Switching/VLANs
    147 Posts 7 Posters 99.8k Views
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • M
      marvosa @Cannondale
      last edited by

      @cannondale Can post the full running-config from the switch and the firewall rule(s) on the VLAN10 interface?

      johnpozJ C 2 Replies Last reply Reply Quote 0
      • johnpozJ
        johnpoz LAYER 8 Global Moderator @marvosa
        last edited by

        @marvosa he says he did post the config - but doesn't look full to me at all, maybe he snipped out stuff? Cuz its clearly missing a bunch of info..

        Maybe maybe a "sho tech-support" would be good thing to take a look.

        As to his rules on his vlan 10 interface, doesn't really matter at this point what those are - if his dhcp is enabled then their would be hidden rules to allow that, and doesn't matter what rules are there when he did his tcpdump -e and didn't see anything with vlan 10 tag.

        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
          marvosa @johnpoz
          last edited by marvosa

          @johnpoz said in No DHCP on pfSense VLAN with Cisco Smart Switch:

          he says he did post the config - but doesn't look full to me at all, maybe he snipped out stuff? Cuz its clearly missing a bunch of info..

          Yeah, I saw that. Agreed, it's clearly missing tons of info... was hoping to take a peek at the "full" config if possible. As mentioned, if a sh run doesn't get us there (and idk why it wouldn't), try attaching a show tech.

          @johnpoz said in No DHCP on pfSense VLAN with Cisco Smart Switch:

          As to his rules on his vlan 10 interface, doesn't really matter at this point what those are - if his dhcp is enabled then their would be hidden rules to allow that, and doesn't matter what rules are there when he did his tcpdump -e and didn't see anything with vlan 10 tag.

          I don't disagree. I'm more curious than anything... considering on occasion... what's been stated doesn't always match up with what's actually been configured.... so putting eyes on it can be helpful.

          TBH, if we're not seeing tagged vlan 10 traffic from the PFsense capture, then nothing's leaving the switch (or the capture was taken on the wrong interface). I'd personally do a write erase and re-configure the switch from the CLI. However, still curious to see the full config and the firewall rules regardless ;)

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

            @marvosa said in No DHCP on pfSense VLAN with Cisco Smart Switch:

            write erase and re-configure the switch from the CLI.

            It sure couldn't hurt - its not like he has anything fancy already on there - looks like everything is just vlan 1.. So not like he would have to take down his whole network while he redoes some crazy config.

            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
            • C
              Cannondale @marvosa
              last edited by

              marvosa, thanks for chiming in. I copied the previously posted from a backup made in the GUI Administration | File Management | File Operations. If there is another way to produce a more complete file, let me know.

              VLAN10 firewall rule below:
              Screenshot from 2023-05-21 15-11-59.png

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

                @cannondale said in No DHCP on pfSense VLAN with Cisco Smart Switch:

                produce a more complete file, let me know.

                a show run should give you the whole config..

                Or a show tech-support would spit out everything..

                So it doesn't page on you, not sure if works on sg250, but works on my sg300 I do a

                term datadump

                This prevents long outputs from stopping and have to hit key to see more, etc.

                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

                C 2 Replies Last reply Reply Quote 0
                • C
                  Cannondale @johnpoz
                  last edited by

                  @johnpoz said in No DHCP on pfSense VLAN with Cisco Smart Switch:

                  a show run should give you the whole config.

                  Output from show run:

                  Roth-SG250-50P-1#show run
                  config-file-header
                  Roth-SG250-50P-1
                  v2.5.9.16 / RCBS3.1_930_871_108
                  CLI v1.0
                  file SSD indicator encrypted
                  @
                  ssd-control-start
                  ssd config
                  ssd file passphrase control unrestricted
                  no ssd file integrity control
                  ssd-control-end cb0a3fdb1f3a1af4e4430033719968c0
                  !
                  !
                  unit-type-control-start
                  unit-type unit 1 network gi uplink none
                  unit-type-control-end
                  !
                  vlan database
                  vlan 10,20
                  exit
                  voice vlan state auto-triggered
                  voice vlan oui-table add 0001e3 Siemens_AG_phone________
                  voice vlan oui-table add 00036b Cisco_phone_____________
                  voice vlan oui-table add 00096e Avaya___________________
                  voice vlan oui-table add 000fe2 H3C_Aolynk______________
                  voice vlan oui-table add 0060b9 Philips_and_NEC_AG_phone
                  voice vlan oui-table add 00d01e Pingtel_phone___________
                  voice vlan oui-table add 00e075 Polycom/Veritel_phone___
                  voice vlan oui-table add 00e0bb 3Com_phone______________
                  no boot host auto-config
                  no boot host auto-update
                  no bonjour enable
                  bonjour interface range vlan 1
                  hostname Roth-SG250-50P-1
                  line telnet
                  exec-timeout 30
                  exit
                  username jer password encrypted $86$5/Jf/f1pY8/95XGv$kPRdzeRMBXmEdsjyTZ1l4+OqCg9fuZ7uKSe5I7LV9IbcgUpUgGQXoGLMEO1AZF52onsZ3HTShH3OYBSXslXbVA== privilege 15
                  username jer2 password encrypted $86$Jd6VBm9YYE9hsEqS$Wr7/T+o2oqDACWSHr0SNJrmwXG2QQ3MS+4EG1j6BknUM6Z8LMYb1/kokfIc3KefDaW5JkhtnW3+gJTnr3sbDJA== privilege 15
                  username cisco password encrypted $86$/AkLn2WkB5AHHhIy$e/TgE126IBbIHLLsdMMw6ozjTovM1bR132PxH3lGmJeltzZ4U3ug9F3ZaUl+BclKIcE60h2j7Sn6o7RYksS53g==
                  ip ssh server
                  ip http timeout-policy 0
                  clock timezone J -4
                  clock dhcp timezone
                  ip telnet server                                      
                  !
                  interface vlan 10
                   name "VL10"
                   no snmp trap link-status
                  !
                  interface vlan 20
                   name "VL20"
                   no snmp trap link-status
                  !
                  interface GigabitEthernet1
                   switchport mode trunk
                   switchport trunk allowed vlan 1,10,20
                  !
                  interface GigabitEthernet22
                   switchport access vlan 20
                  !
                  interface GigabitEthernet24
                   switchport access vlan 10
                  !
                  exit
                  Roth-SG250-50P-1#
                  
                  
                  M 1 Reply Last reply Reply Quote 0
                  • C
                    Cannondale @johnpoz
                    last edited by

                    @johnpoz said in No DHCP on pfSense VLAN with Cisco Smart Switch:

                    Or a show tech-support would spit out everything.

                    show tech-support output attached as file.

                    Cannondale show tech-support 20230521.txt

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

                      @cannondale ok this would explain why not working..

                      Port : gi22
                      Port Mode: 
                      Gvrp Status: disabled
                      Ingress Filtering: true
                      Acceptable Frame Type: admitAll
                      Ingress UnTagged VLAN ( NATIVE ): 1
                       
                      Port is member in: 
                       
                      Vlan               Name               Egress rule     Added by     
                      ---- -------------------------------- ----------- ---------------- 
                       20                VL20                Untagged          S         
                      
                      Port : gi24
                      Port Mode: 
                      Gvrp Status: disabled
                      Ingress Filtering: true
                      Acceptable Frame Type: admitAll
                      Ingress UnTagged VLAN ( NATIVE ): 1
                       
                      Port is member in: 
                       
                      Vlan               Name               Egress rule     Added by     
                      ---- -------------------------------- ----------- ---------------- 
                       10                VL10                Untagged          S         
                      

                      Notice the
                      Ingress UnTagged VLAN ( NATIVE ): 1

                      This is the PVID.. So your untagged traffic coming into the switch from your device would be on vlan 1, so no it would never go out port 1 tagged for the vlan 10 or 20 on these ports.

                      And your ports would be egress untagged on 10 and 20 of these ports.. But the answer from pfsense on its lan for dhcp would would be on vlan 1...

                      You should of been seeing the dhcp from these devices - just on the wrong dhcp server.

                      Port : gi1
                      Port Mode: 
                      Gvrp Status: disabled
                      Ingress Filtering: true
                      Acceptable Frame Type: admitAll
                      Ingress UnTagged VLAN ( NATIVE ): 1
                       
                      Port is member in: 
                       
                      Vlan               Name               Egress rule     Added by     
                      ---- -------------------------------- ----------- ---------------- 
                       1                  1                  Untagged          V         
                       10                VL10                 Tagged           S         
                       20                VL20                 Tagged           S         
                      

                      edit: notice one of my ports that I have a device on vlan 6, which is one that is tagged to pfsense, see the native vlan or pvid for that port is set to 6

                      sg300-28#show interfaces switchport gi18
                      Added by: D-Default, S-Static, G-GVRP, R-Radius Assigned VLAN, T-Guest VLAN, V-Voice VLAN
                      Port : gi18
                      Port Mode: Access 
                      Gvrp Status: disabled
                      Ingress Filtering: true
                      Acceptable Frame Type: admitAll
                      Ingress UnTagged VLAN ( NATIVE ): 6
                       
                      Port is member in: 
                       
                      Vlan               Name               Egress rule     Added by     
                      ---- -------------------------------- ----------- ---------------- 
                       6               W_Guest               Untagged          S         
                      

                      Also curious why all your ports mode is just blank

                      Port Mode:

                      It should be showing trunk or access.. see mine above for gi18, and then on the one that goes to my pfsense

                      sg300-28#show interfaces switchport gi5
                      Added by: D-Default, S-Static, G-GVRP, R-Radius Assigned VLAN, T-Guest VLAN, V-Voice VLAN
                      Port : gi5
                      Port Mode: Trunk
                      Gvrp Status: disabled
                      Ingress Filtering: true
                      Acceptable Frame Type: admitAll
                      Ingress UnTagged VLAN ( NATIVE ): 2
                       
                      Port is member in: 
                       
                      Vlan               Name               Egress rule     Added by     
                      ---- -------------------------------- ----------- ---------------- 
                       2                 Wlan                Untagged          S         
                       4                W_PSK                 Tagged           S         
                       6               W_Guest                Tagged           S         
                      

                      So your port 1 looks ok, other then the missing port mode that is odd. But your ports 22 and 24 should have the native vlan (pvid) set to vlan 10 and 20 etc..

                      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

                      C 1 Reply Last reply Reply Quote 0
                      • C
                        Cannondale @johnpoz
                        last edited by Cannondale

                        @johnpoz said in No DHCP on pfSense VLAN with Cisco Smart Switch:

                        Notice the
                        Ingress UnTagged VLAN ( NATIVE ): 1
                        This is the PVID

                        I do not see where PVID is exposed in the GUI for Access Mode on the membership screen in order to modify.

                        Screenshot from 2023-05-21 16-18-18.png

                        @johnpoz said in No DHCP on pfSense VLAN with Cisco Smart Switch:

                        Also curious why all your ports mode is just blank

                        As marvosa previously mentions, it may be a Cisco firmware thing. The GUI shows "Access" for all ports except port 1, which is "Trunk".

                        Can the PVID be changed in the CLI?

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

                          @cannondale said in No DHCP on pfSense VLAN with Cisco Smart Switch:

                          Can the PVID be changed in the CLI?

                          I don't think so not for a access port.. On my sg300 if I change the access port vlan it auto changes the pvid..

                          example here is port 28

                          sg300-28#sho interfaces switchport gi28
                          Added by: D-Default, S-Static, G-GVRP, R-Radius Assigned VLAN, T-Guest VLAN, V-Voice VLAN
                          Port : gi28
                          Port Mode: Access 
                          Gvrp Status: disabled
                          Ingress Filtering: true
                          Acceptable Frame Type: admitAll
                          Ingress UnTagged VLAN ( NATIVE ): 10
                           
                          Port is member in: 
                           
                          Vlan               Name               Egress rule     Added by     
                          ---- -------------------------------- ----------- ---------------- 
                           10              disabled              Untagged          S         
                          

                          If I then put in say vlan 6.. via the with the little arrows to remove it from 10 and add 6 while picking untagged..

                          guivlan.jpg

                          sg300-28#sho interfaces switchport gi28
                          Added by: D-Default, S-Static, G-GVRP, R-Radius Assigned VLAN, T-Guest VLAN, V-Voice VLAN
                          Port : gi28
                          Port Mode: Access 
                          Gvrp Status: disabled
                          Ingress Filtering: true
                          Acceptable Frame Type: admitAll
                          Ingress UnTagged VLAN ( NATIVE ): 6
                           
                          Port is member in: 
                           
                          Vlan               Name               Egress rule     Added by     
                          ---- -------------------------------- ----------- ---------------- 
                           6               W_Guest               Untagged          S         
                          

                          You could try putting it in vlan 10 or 20 from the cli and see if that works..

                          example - here is me moving it back to 10

                          sg300-28#sho interfaces switchport gi28
                          Added by: D-Default, S-Static, G-GVRP, R-Radius Assigned VLAN, T-Guest VLAN, V-Voice VLAN
                          Port : gi28
                          Port Mode: Access 
                          Gvrp Status: disabled
                          Ingress Filtering: true
                          Acceptable Frame Type: admitAll
                          Ingress UnTagged VLAN ( NATIVE ): 6
                           
                          Port is member in: 
                           
                          Vlan               Name               Egress rule     Added by     
                          ---- -------------------------------- ----------- ---------------- 
                           6               W_Guest               Untagged          S         
                          
                           
                          Forbidden VLANS: 
                          Vlan               Name               
                          ---- -------------------------------- 
                          
                           
                          Classification rules: 
                          sg300-28#conf t
                          sg300-28(config)#int gi28
                          sg300-28(config-if)#switchport access vlan 10
                          sg300-28(config-if)#exit
                          sg300-28(config)#exit
                          sg300-28#sho interfaces switchport gi28
                          Added by: D-Default, S-Static, G-GVRP, R-Radius Assigned VLAN, T-Guest VLAN, V-Voice VLAN
                          Port : gi28
                          Port Mode: Access 
                          Gvrp Status: disabled
                          Ingress Filtering: true
                          Acceptable Frame Type: admitAll
                          Ingress UnTagged VLAN ( NATIVE ): 10
                           
                          Port is member in: 
                           
                          Vlan               Name               Egress rule     Added by     
                          ---- -------------------------------- ----------- ---------------- 
                           10              disabled              Untagged          S         
                          
                           
                          Forbidden VLANS: 
                          Vlan               Name               
                          ---- -------------------------------- 
                          
                           
                          Classification rules: 
                          sg300-28#
                          

                          I don't really like that your gui doesn't show mode, nor the P that it has in its legends that should mark what the pvid is, etc. Maybe you want to roll back in the firmware.. Maybe there is something wrong with this firmware.. But it for sure is not going to work if untagged traffic coming from your device is going on to vlan 1 vs 10..

                          maybe you could just put 22 or 24 into trunk mode or general mode.. And be able to set the pvid, and just set vlan 10 or 20 to be untagged..

                          You might want to ask on the cisco forums.. I doubt you have support from cisco ;)

                          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

                          C 1 Reply Last reply Reply Quote 0
                          • C
                            Cannondale @johnpoz
                            last edited by

                            johnpoz, this is the output of sho interfaces switchport gi24 (VLAN10 port):

                            Screenshot from 2023-05-21 16-51-04.png

                            You are the expert here but it doesn't seem reasonable to not expose the PVID in the GUI for Access Mode ports if it is required for VLAN configuration.

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

                              @cannondale it doesn't need to be expose really since access port can only ever be in 1 vlan, and the pvid should be switched to the vlan you put the access port in.

                              But seems yours is not doing that..

                              Try toggle the vlan via cli and see if it switches the native (pvid) if it doesn't then its borked for sure. Not just gui, and I would try rolling back to previous firmware.

                              A work around would be to put it in general mode where the pvid should be able to be changed.. or set to trunk with just using untagged for egress of vlan and native you can set..

                              Mine exposes in that it shows what the pvid is in the gui..

                              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

                              C 1 Reply Last reply Reply Quote 0
                              • M
                                mvikman
                                last edited by

                                I would say that those differences what the switches are showing are caused by the different way that the firmwares show stuff.
                                My CBS250 switch shows config more or less the same way as Cannondale's and my network is working fine VLANs and all.

                                Also these so called business/small business switches don't have the full IOS and different generations seem to behave differently from each other...

                                pfSense Plus 24.11-RELEASE (amd64)
                                Dell Optiplex 7040 SFF
                                Core i5-6500, 8GB RAM, 2x 240GB SSD (ZFS Mirror)
                                HPE 561T (X540-AT2), 2-port 10Gb RJ45
                                HPE 562SFP+ (X710-DA2), 2-port 10Gb SFP+

                                johnpozJ 1 Reply Last reply Reply Quote 0
                                • C
                                  Cannondale @johnpoz
                                  last edited by

                                  Thanks for all your help johnpoz! You get the gold star for hanging in there on this issue!
                                  I think I'll try to roll back the firmware as a first step.
                                  When I acquired the switch, it had fw v2.4.0.94, which I upgrade to the latest (v2.5.9.16).
                                  It's possible that it was not upgraded for a reason!

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

                                    @mvikman said in No DHCP on pfSense VLAN with Cisco Smart Switch:

                                    business switches don't have the full IOS

                                    Very true - but its close enough that if you are cisco guy in the enterprise, its damn close ;)

                                    The basics all pretty much the same.. When I first got mine I didn't even use the gui, but figured what the hell lt has it - lets give it a look see.

                                    I do recall having impossible time trying to get the gui to load a ssl for https, had to do that from the cli.

                                    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
                                    • johnpozJ
                                      johnpoz LAYER 8 Global Moderator @Cannondale
                                      last edited by

                                      @cannondale said in No DHCP on pfSense VLAN with Cisco Smart Switch:

                                      I think I'll try to roll back the firmware as a first step.

                                      Did you try just changing the vlan from the cli, maybe its just a bug in the gui, and if you change the vlan at the client it correctly sets the pvid.

                                      Also prob look in the cisco forums - I will do a quick little gui now that we know its not changing the native vlan for access ports.

                                      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
                                      • M
                                        marvosa @Cannondale
                                        last edited by

                                        @cannondale

                                        interface GigabitEthernet1
                                         switchport mode trunk
                                         switchport trunk allowed vlan 1,10,20
                                        

                                        I'd remove vlan 1 from the allowed line on your trunk (Gi1).

                                        Too many odd things that aren't adding up. Rolling back the firmware may work, but if it doesn't, I'd still recommend rebuilding the config from scratch from the cli. You'll likely save yourself countless hours of more troubleshooting.

                                        C johnpozJ 2 Replies Last reply Reply Quote 0
                                        • C
                                          Cannondale @marvosa
                                          last edited by

                                          Thanks for the suggestions guys! You both have given me some additional options to try.

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

                                            @marvosa said in No DHCP on pfSense VLAN with Cisco Smart Switch:

                                            I'd remove vlan 1 from the allowed line on your trunk (Gi1).

                                            He is using that, as the native vlan.. Its just untagged so he wouldn't remove it.

                                            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

                                            C 1 Reply Last reply Reply Quote 0
                                            • First post
                                              Last post
                                            Copyright 2025 Rubicon Communications LLC (Netgate). All rights reserved.