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Wired Networks Thread, Slow DHCP IP Allocation in Technical; IP Range: 172.16.31.255 Subnet: 255.255.224.0 DHCP Relay: 172.16.0.1 (Domain Controller with DHCP) Primary Comms Master Switch: 172.16.0.40 Primary Comms Sub ...
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    Slow DHCP IP Allocation

    IP Range: 172.16.31.255
    Subnet: 255.255.224.0

    DHCP Relay: 172.16.0.1 (Domain Controller with DHCP)

    Primary Comms Master Switch: 172.16.0.40
    Primary Comms Sub Switch: 172.16.0.41

    Secondary Comms Master Switch: 172.16.0.50
    Secondary Comms Sub Switch: 172.16.0.51

    Master and Sub Switches are Stacked, Primary and Secondary Masters linked by Fibre Optic.

    For some reason it seems to take atleast 30 seconds for clients to be allocated with an IP address on the network. The switches are Cisco SGE-2000 Managed, any ideas as to possible causes of the slowness or settings which could be causing this?

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    SYNACK's Avatar
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    Do you have spanning tree on and have you made sure to set the spanning tree mode to portfast.

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    eversonj90 (4th August 2011)

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    ChrisH's Avatar
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    Image 5 STP operation mode.

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    eversonj90 (4th August 2011)

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    nephilim's Avatar
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    Image 5 set the STP to portfast. Was it a company that did the setup and did he do any documentation??

    *Edit*

    Chris you beat me too it! lol

  8. Thanks to nephilim from:

    eversonj90 (4th August 2011)

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    Contractor - no documentation. Wasn't my call on his involvement -.-

    STP Operation Mode Options: Classic, Rapid or Multiple?

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    nephilim's Avatar
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    Ring him and demand documentation...any contractor or network engineer worth his salt would do documentation with their work.

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    SYNACK's Avatar
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    Quote Originally Posted by eversonj90 View Post
    Contractor - no documentation. Wasn't my call on his involvement -.-

    STP Operation Mode Options: Classic, Rapid or Multiple?
    Rapid, same thing with a different name.

  12. Thanks to SYNACK from:

    eversonj90 (4th August 2011)

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    Thanks - all resolved!

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