Distributing IP Address'es Scopes for different VLANS.

sina2011sina2011 Member Posts: 239 ■□□□□□□□□□
in CCNA & CCENT
Hi Guys,


I was wondering how would i go about distributing different ip address scopes to different vlans and making sure each vlan gets the right ip address.

Any advice would be appreciated.

Thanks.
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  • Arthurg81Arthurg81 Member Posts: 20 ■□□□□□□□□□
    need to implement the ROAS design, subnet the IP you are given and apply each subnet to each subinterface on the Router.
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  • RouteMyPacketRouteMyPacket Member Posts: 1,104
    We do this via the ip helper address command. So when we have several VLANS and our DHCP server sits on a different VLAN, we use this command.

    interface vlan 2
    ip add 192.168.2.1 255.255.255.0
    ip helper-address 192.168.1.1

    interface vlan 3
    ip add 192.168.3.1 255.255.255.0
    ip helper-address 192.168.1.1


    Tada!


    Also, we can have multiple servers defined like

    interface vlan 2
    ip add 192.168.2.1 255.255.255.0
    ip helper-address 192.168.1.1
    ip helper-address 192.168.1.2

    interface vlan 3
    ip add 192.168.3.1 255.255.255.0
    ip helper-address 192.168.1.1
    ip helper-address 192.168.1.2
    Modularity and Design Simplicity:

    Think of the 2:00 a.m. test—if you were awakened in the
    middle of the night because of a network problem and had to figure out the
    traffic flows in your network while you were half asleep, could you do it?
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