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How do you do....it? Thread, DHCP Relay Agent in Technical; So the DHCP is in vlan 1? The ip range configured for VLAN 1 is 10.43.113.73 - 10.43.113.78 I assume ...
  1. #16

    FN-GM's Avatar
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    So the DHCP is in vlan 1?

    The ip range configured for VLAN 1 is 10.43.113.73 - 10.43.113.78

    I assume this is not what your using?

    For VLAN 1 what is the IP range do you use and what subnet mask?

    It looks like its not routing back to the DHCP because VLAN 1 is not configured correctly.
    Last edited by FN-GM; 12th February 2013 at 02:04 PM.

  2. #17

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    The ip range for VLAN 1 is 10.43.112.1 - 119.254 SN - 255.255.248.0
    The ip Range for VLAN 100 is 10.74.220.1 -221.254 SN - 255.255.254.0

  3. #18

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    Is Subnet mask configured as 255.255.248.0 in DHCP for VLAN 1?

    For vlan 100 why did you pick that IP please? Usually people would pick something like 10.74.221.254 for that range.

  4. #19

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    Quote Originally Posted by FN-GM View Post
    Is Subnet mask configured as 255.255.248.0 in DHCP for VLAN 1?

    For vlan 100 why did you pick that IP please? Usually people would pick something like 10.74.221.254 for that range.
    I chose that just because it was the first one available in that range. 255.255.248 is also configured in DHCP for VLAN 1

  5. #20

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    Urgh, right sorry i have been reading this wrong start again!! sorry I was reading it as 255.255.255.248 need to go to spec savers!

    I chose that just because it was the first one available in that range
    10.74.220.1 is. not 10.74.220.5

    Can you ping the DHCP ip (10.43.112.4) from VLAN 100?
    Last edited by FN-GM; 12th February 2013 at 02:18 PM.

  6. #21

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    Quote Originally Posted by FN-GM View Post
    Urgh, right sorry i have been reading this wrong start again!! sorry I was reading it as 255.255.255.248 need to go to spec savers!



    10.74.220.1 is. not 10.74.220.5

    Can you ping the DHCP ip (10.43.112.4) from VLAN 100?
    I set a static IP and i can ping the ip address of VLAN 100 and VLAN 1 but not the DHCP server

  7. #22
    timbo343's Avatar
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    Hav eyou authorised the DHCP server? I know its a simple question, often overlooked

  8. #23

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    Quote Originally Posted by timbo343 View Post
    Hav eyou authorised the DHCP server? I know its a simple question, often overlooked
    yes i have as its handing out DHCPs from VLAN 1.

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    Interestingly is saying 2 addresses in use when i display statistics for the scope but no leases appear. Is it worth un-authorising and re-authorising DHCP?

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    You have to authorise it per scope. It wont harm re-authorising.
    Attached Images Attached Images

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    Our core switch is a Cisco rather than a HP, I had to change its default operating mode from a Layer 2 switch to a Layer 3 switch before I started entering any config. Could this switch be the same? If its running in Layer 2 mode it wouldn't work....?

  12. #27

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    It will only authorise for the whole dhcp server not per scope. How do you authorise per scope?

  13. #28
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    Is DHCP-relay enabled on the switch? And does your DHCP server plug directly into this switch? I was told once that the server had to connect directly into it.

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    Quote Originally Posted by themightymrp View Post
    Is DHCP-relay enabled on the switch? And does your DHCP server plug directly into this switch? I was told once that the server had to connect directly into it.
    yes its enabled.

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    Just looking at the config, should there be a setting for ip default-gateway ?

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