Re: DHCP superscpes

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From: Phillip Windell (_at_.)
Date: 11/22/04 

Date: Mon, 22 Nov 2004 15:36:46 -0600

No superscopes! That is not what they are for,...in fact I have never really
seen their use explained clearly enough to make any real sense,..or at least
good enough to prove they are ever really unavoidably needed. There are
always better ways which end up preventing them from being needed.

Use a separate distinct scope for each subnet (VLAN). Leave the DHCP in a
single VLAN. Configure the Router(s) to forward DHCP Queries. The routers
will include the required information so the DHCP Server knows where it came
from and from what scope to pull from.

There is no functional difference between VLANs and physical LANs,...it
still works the same way. VLANs share the same cable physically but *not*
"logically", and it is only the "logical" realm that matters with VLANs. So
you do *not* have the same situation as running multiple physical LANs over
the same physical cable,....which is one of the described purposes of
Superscopes.

Ours here is a hybrid of VLAN and physical LAN,...everything works fine and
I am careful to never over-complicate things. 

-- 
Phillip Windell [MCP, MVP, CCNA]
www.wandtv.com
"KMNR" <KMNR@discussions.microsoft.com> wrote in message
news:9C8737D4-4983-471D-A8A1-117799578A8D@microsoft.com...
> My current network consists of multiple VLANS connected via the same
physical
> media.  I want to setup a DHCP superscope on our DHCP4 server to handle
> dynamic IP address allocation for each subnet.
> Our DHCP server currently resides in VLAN 1 and has a VLAN 1 subnet
address.
> How does the DHCP server determine which pool to assign the appropiate
> subnet address to the lease request, originating from different VLANS,
> understanding that requesting clients submit an all 1's broadcast to
initiate
> the DHCP lease process?

Relevant Pages

  • Re: My Network Places - Across WAN
    ... Are there issues I need to consider DHCP with multiple vlans? ... The wrkstn vlan is on a different vlan than my "new" AD dhcp server. ... then you may have to setup a DHCP Relay for each VLAN subnet. ...
    (microsoft.public.windows.server.active_directory)
  • Re: My Network Places - Across WAN
    ... Are there issues I need to consider DHCP with multiple vlans? ... The wrkstn vlan is on a different vlan than my "new" AD dhcp server. ... then you may have to setup a DHCP Relay for each VLAN subnet. ...
    (microsoft.public.windows.server.active_directory)
  • Re: 2 domains on the same subnet
    ... Forget the reservations. ... let me ask you: Is the separate VLan an option for you or not? ... DHCP server goes down, the domain B's DHCP won't give out an IP address to ...
    (microsoft.public.windows.server.active_directory)
  • Re: Multiple IPs on single NIC and multiple VLANs
    ... then it is possible for us to point these NIC to VLAN which you have ... are you using CISCO or MS dhcp server for VLAN configuration? ... you have to connect these 2 NIC cards to different subnet range / 2 ...
    (microsoft.public.win32.programmer.networks)
  • Re: arp-proxy
    ... address allocated by DHCP ... the MAC address for cust1 must never appear as a source MAC ... a broadcast from the service subnet should appear on all customer VLANs ... to the correct customer VLAN ...
    (freebsd-net)