Re: DHCP server assigning addresses on remote subnet

Yes, based on the router interface it came from,
Anthony,
http://www.airdesk.co.uk


"Scott" <Scott@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:9F1E2F8F-B35F-45DB-8935-9C4276500001@xxxxxxxxxxxxxxxx
Anthony,

Sorry, I misstated that. I was just reiterating that the address is
assigned
based on the scope that matches the IP subnet of the LAN IP Address for
the
FE interface on the router? Just trying to figure out how it knows which
scope to associate with - in the example of many remote subnets and many
address scopes.

"Anthony [MVP]" wrote:

The IP Helper is the address of the DHCP server, so if that were set
incorrectly there would be no reply,
Anthony,
http://www.airdesk.co.uk


"Scott" <Scott@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:F0C16D18-E551-442D-87D3-15700E7A7819@xxxxxxxxxxxxxxxx
So, based on that information. If there were many scopes created, and
the
LAN
IP Address was configured on the router was accidently set incorrect,
it
would request addresses from the wrong scope? (based on the subnet of
the
local LAN)?

"Anthony [MVP]" wrote:

Scott,
Yes, it knows where the request came from so it can allocate an
address
from
the correct range. The IP Helper is just forwarding the request, which
would
not cross the subnets otherwise,
Anthony,
http://www.airdesk.co.uk


"Scott" <Scott@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:17D37C0E-FED2-4DD3-9DCC-811A8E6F9DFE@xxxxxxxxxxxxxxxx
Stupid Question:

I have a remote subnet connected via a WAN link. The DHCP server is
installed on the opposite side of the WAN link. The Cisco router is
configured with the IP Helper Address command, to point to the DHCP
server's
IP Address, but does not specify an address range/subnet. The DHCP
server
is
configured for multiple subnets. If the Cisco router is configured
only
with
the address of the DHCP server, and not any details about which
range
to
obtain addresses from, how does the DHCP know from which pool to
assign
addresses to this remote subnet? Does it use the LAN address from
the
router
as an index?








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