Help I am Unable To Assign Management IP On 4600 Switch Because It is on SVI and DHCP

businessuer
businessuer Posts: 34  Freshman Member
Hi,
I have a 4600 switch in which Basic setting > ip setup> is 10.2.0.1 /24.
It is assigned to vlan 2.
I want to use 10.2.0.1 for management purpose.
I can ping in from my network but when I put the ip address in web browser I cannot go in.

I try to put another ip address 10.2.0.250 as ip address also vlan 2. but it doesnt work.
The error message is Error: There must be at least one iface associated with this VID for DHCP settings.

I try put 10.2.0.250 as loopback address. It doesnt allow me to. How to solve this problem?

Summary:
Created 10.2.0.1/24 (vlan 2) SVI and DHCP for management.
Can ping 10.2.0.1. Use web browser go in cannot.
Creation of 10.2.0.2 as loopback address or new ip interface fails.
Now need Zyxel help.!!
Pls help me!
«1

All Replies

  • Nebula_Adam
    Nebula_Adam Posts: 71  Zyxel Employee
    edited May 3
    Hi @businessuer

    Thanks for the information.
    From you description, we can only see that you've configured a VLAN 2 with 10.2.0.1/24 subnet.

    There are steps for you to confirm VLAN and DHCP settings:
    1. Created VLAN 2 with subnet 10.2.0.1/24 
    2. Fixed and untagged a port(s) for PC. (You may need to tagged a port(s) for your server)
    3. Set PVID 2 for the port, which the switchport you connected to your PC.
    4. Configure DHCP with VLAN 2 and subnet range as 10.2.0.0/24.
    (If you have created a VLAN with a subnet, you should be able to configure a DHCP for the VLAN)

    May you also share a screenshot of the error message" There must be at least one iface associated with this VID for DHCP settings" because I am unable to reproduce the issue.

    For loopback interface issue, you may try to ssh/telnet/console to switch and type command as workaround now. The loopback interface can be only added by using command, and modify IP address on web GUI, I will report your issue to our engineer.

    Adding Loopback interface command as below:
    interface loopback (0-7)
    ip address 10.2.0.2 255.255.255.0

    Sorry for the inconvenience and let me know the result of VLAN&DHCP issue.

    Adam
  • businessuer
    businessuer Posts: 34  Freshman Member
    Is it possible to add vlan for the loopback?
  • businessuer
    businessuer Posts: 34  Freshman Member
    The problem is that I am trying to ping from the wifi in the management.
    I can ping the ip.
    But I cannot use the web browser to go in.
    So it is not vlan configuration on switch issue.
    Pls advice.
  • Nebula_Adam
    Nebula_Adam Posts: 71  Zyxel Employee
    edited May 3
    @businessuer,

    Thanks for the update.
    May you check that if the HTTP service is enabled on switch via console?

    or you may check your gateway device to see if it blocks HTTP service for this switch.

    Furthermore, you should not have overlapped IP subnet in a switch. 10.2.0.1/24, 10.2.0.250, and 10.2.0.2 are overlapped.
    Adam
  • businessuer
    businessuer Posts: 34  Freshman Member
    Hi,
    Dear Adam.
    I am using XGS 4600. 
    This is the documentation: https://prodotti.zyxel.it/USERSGUIDE/XGS4600-SERIE.pdf
    On pg86, it states that loopback address can be applied.

    Q1 However, I want to check if it is possible to put it as vlan?
    I want to purposely add overlapped subnet. 
    My switch is running as a DHCP Server.
    The SVI is 10.2.0.1. (vlan 2) 
    The DHCP pool is 10.2.0.1/24.
    It is giving ip addresses for a management vlan. 
    Using wifi I can ping 10.2.0.1.
    But I cannot http or https this ip.
    How do  I http or https this ip?
    What should i do if I cannot create overlapping subnet?


  • Nebula_Adam
    Nebula_Adam Posts: 71  Zyxel Employee
    edited May 4
    @businessuer

    We are sorry for the loopback interface part. 
    I've reported this issue to our engineer.

    Loopback interface is not allow to add VLAN.

    May we know why you would like to make an overlapping subnet?
    It's now possible to assign the subnet on the same switch. You should try to use another device to configure same subnet for making overlapped.

    Please also check remote-management to see if http or https is allowed right IP range ,and enabled http and https on your switch.


    Our switch is enabled http service by default, so it should not have problem to access web GUI of XGS4600 in your scenario.

    If you are unable to access the switch web GUI after checking remote-management, you may PM the configuration of switch to me so I can help you to check.

    Adam
  • businessuer
    businessuer Posts: 34  Freshman Member
    May we know why you would like to make an overlapping subnet?

    Very simple.
    Switch acts as dhcp server.
    The SVI is 10.2.0.1. (vlan 2) 
    The DHCP pool is 10.2.0.1/24.
    I want to add 10.2.0.1 as loopback interface so I can ping it and http https in. 

  • Nebula_Adam
    Nebula_Adam Posts: 71  Zyxel Employee
    @businessuer,

    I have to clarify that when you configured switch as:
    The SVI is 10.2.0.1. (vlan 2) 
    The DHCP pool is 10.2.0.1/24

    You should be able to ping and access switch web GUI after your client gets DHCP IP address. The premise is that if your remote-management is allowing DHCP IP subnet or is 0.0.0.0-0.0.0.0 and HTTP/HTTPS. 

    I want to add 10.2.0.1 as loopback interface so I can ping it and http https in. 
    For adding the loopback interface, please follow the images below:


    Then the loopback interface 0 will appear.

    Adam
  • businessuer
    businessuer Posts: 34  Freshman Member
    ok thank you. So will upgrade firmware to put vlan for loopback interface in new release?
  • Nebula_Adam
    Nebula_Adam Posts: 71  Zyxel Employee
    edited May 6
    @businessuer,

    Sorry, there is no plan to add vlan to loopback interface.
    Kindly inform you that you may try to search on the Internet and see that there is no any switch and router support VLAN on loopback interface.

    Kindly inform you that you may try to assign subnet for your loopback interface since 10.2.0.250 is overlapped to DHCP pool.
    May we also know that if you are able to access switch web GUI now via 10.2.0.1 or IP address of loopback interface now?

    Let me know if you have any question.
    Adam
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