Assign static IPs to port of a managed switch

Hallo group,

is the following scenario possible:

I want to connect 14 computer with GBit LAN via a GBit-Switch. Each of
the computers should get his IP via DHCP (the switch should act as DHCP
server). Every assigned IP address should depend on the port where the
computer is connected.

for example:
computer 1 is connected to port 1 of the switch and gets IP address
192.168.x.1,
computer 2 is connected to port 2 of the switch and gets IP address
192.168.x.2,
computer 3 is connected to port 3 of the switch and gets IP address
192.168.x.3,
....
computer 14 is connected to port 14 of the switch and gets IP address
192.168.x.14
via the DHCP Server running on the switch.

Is it possible to configure the DHCP server within the managed layer 2
or layer 3 switch to assign IPs depending on the connected port?
Is it possible use VLANs to get the same effect?

Thanks
Chris

In article <42bbc782$0$14559$(E-Mail Removed)>,
Christian Neuner <(E-Mail Removed)> wrote:
:I want to connect 14 computer with GBit LAN via a GBit-Switch. Each of
:the computers should get his IP via DHCP (the switch should act as DHCP
:server). Every assigned IP address should depend on the port where the
:computer is connected.

:Is it possible to configure the DHCP server within the managed layer 2
r layer 3 switch to assign IPs depending on the connected port?

Most *switches* will not act as DHCP servers at all. Whether any
particular switch will allow not only DHCP but location-sensitive DHCP
would depend greatly on the switch model and software revision,
which you have not specified.

:Is it possible use VLANs to get the same effect?

Not usually.


If you want port-specific DHCP then you should use a switch that
supports DHCP Forwarding, with Interface Tracking (Option 82).

--
"No one has the right to destroy another person's belief by
demanding empirical evidence." -- Ann Landers

On Fri, 24 Jun 2005 10:42:43 +0200, Christian Neuner
<(E-Mail Removed)> wrote:


>is the following scenario possible:


Probly not. As this is not DHCP anymore. You just want to automate the
setting of statics.

On second thought, you maybe able to tell a DHCP server, "assign this
IP to this MAC" but most likely that won't come from a switch. A
switch's main job is not DHCP. Some switches may have a rudimentary
DHCP server built-in, but not when you start to get fancy, then u need
an honest-to-God DHCP server running from a server box.

I could be wrong. <g>

Walter Roberson wrote:
> If you want port-specific DHCP then you should use a switch that
> supports DHCP Forwarding, with Interface Tracking (Option 82).

Thank you for the hint, I will look into that.

Christian

bobb wrote:
> On second thought, you maybe able to tell a DHCP server, "assign this
> IP to this MAC" but most likely that won't come from a switch.

This wouldn't help, because the IP adress should depend on the connected
port, not on the MAC adress.
For example if I connected a computer with the IP 192.168.x.5 (was
connected to port 5) to port 8 of the switch, it should get the IP
192.168.x.8.

Christian