ip address to mac-address

[pcfreak49]

I have a question how can a connection to a specific ip address mac-address

[cadet alain]

Hi,

Completely unintelligible question, Can you reformulate more clearly please.

Regards.

Alain.

[pcfreak49]

how can you have a MAC address to an ip address to

[cadet alain]

Hi,

Not much more understandable but anyway let's do some assumption, you mean:

- how to get MAC address corresponding to IP address ?

If it is the question then you have to look in arp cache, on a PC arp -a and on a Cisco Router  show ip arp.

Regards.

Alain.

[pcfreak49]

mac and remains always refer to the ip address

[cadet alain]

You want to configure a static arp entry?  Then in global config: arp "ip add" "mac add"

Regards.

Alain.

[pcfreak49]

Yes for that device always gets the same ip address

[cadet alain]

Ah ok so you want a device with a MAC address to get always the same IP with DHCP?

Then you configure a  network DHCP Pool  and then another one with the manual binding like this:

ip dhcp pool PARENT

network 192.168.1.0 /24

default-router x.x.x.x

ip dhcp pool CHILD

host 192.168.1.2 255.255.255.0

hardware-address xxxx.xxxx.xxxx or client-identifier 01xx.xxxx.xxxx.xx To see what to use just let your host get an IP from PARENT pool and then do show ip dhcp binding and you'll know what it uses.

Regards.

Alain.

[pcfreak49]

can you do that without DHCP or is it not possible

[cadet alain]

Hi,

of course  with a static IP but I suppose it has something to do with the ip vaste problem  post in  WAN routing and switching section?

If this is the case, AFAIK whether you ask for a static permanent IP whether you have dynamic DHCP given IP but not statically defined.

Regards.

Alain.

[pcfreak49]

so it'll only work if I have a static IP address from the isp

[cadet alain]

AFAIK if you want your WAN address to stay the same you have to ask for a static IP from ISP as they don't give DHCP addresses withi nfinite leases.

Regards.

Alain.