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DHCP for multiple subnets

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  • DHCP for multiple subnets

    Hello,

    I have configuration issue in our network. I have two L3 switches (DGS-3650, DXS-3350SR) connected by 1gbps bone (untagged VLAN ID 209)

    DGS-3650:
    VLAN default 1 - LAN,AD, DHCP (multiple scopes 192.168.0.0/24, 192.168.1.0/24,192.168.2.0/24,192.168.201.0/24)

    VLAN 1 - IP interface 192.168.1.254, DHCP relay configured to server 192.168.0.200

    VLAN 2 - IP interface 192.168.2.254, DHCP relay configured to server 192.168.0.200

    VLAN 209 - (used for connection to another L3 switch) - ip interface 192.168.209.1

    DXS-3350SR:
    VLAN default: (not use, ipnterface IP 192.168.208.1)

    VLAN 209 (used for connection to another L3 switch) - ip interface 192.168.209.2

    VLAN 201 - ip interface 192.168.201.254, configured DHCP relay 192.168.0.200

    My problem is that computer connected do port asigned to VLAN 209 doesnt obtain IP address from DHCP.

    If I set up static IP, I can ping to all other subnets, and from all other subnet I can ping back to this computer. Static routes ale configured correctly.

    If I connect computer to first switch to VLAN 1 or VLAN 2 it works great.

    Can anybody help me?

    Best regards

    Caspi
    Thanks

    Caspi

  • #2
    Re: DHCP for multiple subnets

    Do you have a relay agent configured for VLAN 209, and also a scope that matches the subnet information in DHCP?
    JM @ IT Training & Consulting
    http://www.itgeared.com

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    • #3
      Re: DHCP for multiple subnets

      Doesn't look like you have a dhcp scope configured for clients in Vlan 209 from what you typed.

      Also I wouldnt put clients in a vlan you are only using for L3 connectivity to another switch. I would create their own vlan and corresponding SVI.
      Last edited by auglan; 18th January 2012, 17:54.
      CCNA, CCNA-Security, CCNP
      CCIE Security (In Progress)

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      • #4
        Re: DHCP for multiple subnets

        Use the IP helper address on your switches.

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