ExtremeSwitching (EXOS)

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how to configure dhcp server in extreme switch and if you multiple vlan in switch how to apply dhcp in all vlan?

Johan Hendrikx

Johan Hendrikx04-22-2015 08:02

Sumit Johari

Sumit Johari05-28-2015 13:51

  • 1.  how to configure dhcp server in extreme switch and if you multiple vlan in switch how to apply dhcp in all vlan?

    Posted 04-22-2015 07:49
    how to configure dhcp server in extreme switch and if you multiple vlan in switch how to apply dhcp in all vlan?


  • 2.  RE: how to configure dhcp server in extreme switch and if you multiple vlan in switch how to apply dhcp in all vlan?

    Posted 04-22-2015 08:02
    Like this:

    configure vlan


  • 3.  RE: how to configure dhcp server in extreme switch and if you multiple vlan in switch how to apply dhcp in all vlan?

    Posted 03-30-2017 19:54
    Hi everybody.

    I have a question: Is it necessary to configure "enable bootprelay vlan X" in both SW´s:
    Acces SW (Layer 2) and in the Core SW (Layer 3),
    Or is enough only in Core SW (Layer



  • 4.  RE: how to configure dhcp server in extreme switch and if you multiple vlan in switch how to apply dhcp in all vlan?

    Posted 06-18-2021 05:11
    Hello How can I set 3 or 4 dns on dhcpvlan switch x150 or 450a?

    What is the meaning of timer based? Seconds, minutes or hours



  • 5.  RE: how to configure dhcp server in extreme switch and if you multiple vlan in switch how to apply dhcp in all vlan?

    Posted 06-18-2021 05:15
    Hello How can I set 3 or 4 dns on dhcpvlan switch x150 or 450a?

    What is the meaning of timer based? Seconds, minutes or hours



  • 6.  RE: how to configure dhcp server in extreme switch and if you multiple vlan in switch how to apply dhcp in all vlan?

    Posted 04-22-2015 09:04
    Dear Johan,

    i am using dhcp server (window server 2012) and only want to change all vlan take dhcp ip address from this server.


  • 7.  RE: how to configure dhcp server in extreme switch and if you multiple vlan in switch how to apply dhcp in all vlan?

    Posted 04-22-2015 09:14
    Oke:

    configure bootprelay add >dhcpserver>

    enable bootprelay vlan


  • 8.  RE: how to configure dhcp server in extreme switch and if you multiple vlan in switch how to apply dhcp in all vlan?

    Posted 04-22-2015 09:44
    thanks johan,

    I am currently using one dhcp in our environment need to change his ip address.what is command to change dhcp server ip address.
    after changing the dhcp ip address all vlan by default take ip address from the new dhcp server.
    its not required to use enable bootprelay commands for all vlan .because i have already enable bootprelay commands for all vlan.

    my current config_

    configure bootprelay add [i] vr VR-Default
    configure bootprelay dhcp-agent information check vr VR-Default
    enable bootprelay vr VR-Default vlan


  • 9.  RE: how to configure dhcp server in extreme switch and if you multiple vlan in switch how to apply dhcp in all vlan?

    Posted 04-22-2015 09:51
    To change the bootprelay addres:

    configure bootprelay add


  • 10.  RE: how to configure dhcp server in extreme switch and if you multiple vlan in switch how to apply dhcp in all vlan?

    Posted 04-22-2015 09:56
    Oke.

    By Default all vlan take ip address from this new dhcp server add


  • 11.  RE: how to configure dhcp server in extreme switch and if you multiple vlan in switch how to apply dhcp in all vlan?

    Posted 05-28-2015 09:20
    Hi Johan,

    If i will add a new dhcp server without delete the old dhcp server it will give any impact.
    @old server i will shut down but server entry will be remain and switch.


  • 12.  RE: how to configure dhcp server in extreme switch and if you multiple vlan in switch how to apply dhcp in all vlan?

    Posted 05-28-2015 09:22
    Hi Johan,

    We are using the vrrp between the extreme l3 switch please let me know which switch i will do the change first dhcp server ip address?

    Regards
    Sumit



  • 13.  RE: how to configure dhcp server in extreme switch and if you multiple vlan in switch how to apply dhcp in all vlan?

    Posted 05-28-2015 13:32
    Here is an article from our knowledge website explaining how to configure a DHCP server for a VLAN

    Browser View: https://gtacknowledge.extremenetworks.com/articles/How_To/How-to-configure-the-DHCP-server-on-a-VLAN-in-EXOS


  • 14.  RE: how to configure dhcp server in extreme switch and if you multiple vlan in switch how to apply dhcp in all vlan?

    Posted 05-28-2015 13:51
    Hi Summit, in addition to what Johan has outlined above,

    A VLAN will only request an IP address from a DHCP server that is configured globally, or explicitly enabled on that particular VLAN. In the two commands below, the first command adds a DHCP server to the vlan v1_vlan meaning, the switch can attempt to solicit an IP address from 192.168.0.1 for any client within v1_vlan. In the second command, the DHCP server 10.0.0.1 is enabled globally. What this means is that the clients in v1_vlan now have access to a second DHCP Server (10.0.0.1).

    configure bootprelay "v1_vlan" add 192.168.0.1
    configure bootprelay add 10.0.0.1[/code]
    Whether or not an IP address will be assigned to a client is not important at this stage, because the DHCP server has the responsibility to assign the correct IP address in the correct subnet by choosing the DHCP DISCOVER packet to respond to. Similarly, the DHCP client is responsible for accepting the appropriate DHCP OFFER from the DHCP server. Extreme's switches handle multiple DHCPs configured for a single VLAN using Sequential mode where the switch relays a DHCP DISCOVER packet for the first IP. If there is no offer from the Server after three tries, the Switch then attempts the second IP until an offer is received.

    I hope the above answer two of your questions. Finally, you'd have to elaborate a little further on how you've deployed VRRP. In an idea situation that would be an entirely different set of devices altogether, and if they are, then the DHCP packets simply transit through them enroute to the DHCP Server



  • 15.  RE: how to configure dhcp server in extreme switch and if you multiple vlan in switch how to apply dhcp in all vlan?

    Posted 04-22-2015 08:02
    Hi sir, if i have dhcp server configuration in my extreme switch.
    but i want to take my dhcp vlan 100 from my extreme switch tagged port 16 (where multiple service vlan are tagged) to my another cisco switch.

    is it possible without "enable dhcp port 16 vlan xyz" will work (because there are multiple vlan are tagged at 16th port and i do not want to enable dhcp port 16 and want to use 100 vlan on outside switch untagged port)


  • 16.  RE: how to configure dhcp server in extreme switch and if you multiple vlan in switch how to apply dhcp in all vlan?

    Posted 05-28-2015 13:51
    Thanks.....


  • 17.  RE: how to configure dhcp server in extreme switch and if you multiple vlan in switch how to apply dhcp in all vlan?

    Posted 03-30-2017 19:54
    Bootprelay needs to be enabled on the switch that is routing. As long as the device has L2 connectivity up to the routing switch bootprelay will take over from there.


  • 18.  RE: how to configure dhcp server in extreme switch and if you multiple vlan in switch how to apply dhcp in all vlan?

    Posted 03-30-2017 19:54
    Thank You Patrick Voss