1841 - ip dhcp Pool StaticClients

[mauric]

Hello together

I'am Running in a small Office with me Router 1841 and i fight with DHCP Static Assigning.

here i have Printers, NAS, and Wifi AP, after confiugure this devices with Static DHCP in me

router i see only the Printers that will become the right assigned IP-Adresses.

the other Devices will take any other adresses from the free DHCP Range, but not this i want

to assign to Device.

After troblehooting and play with the Option:
clear arp-cache, and disconnect devices from the Switch, always the system will assign any

free ip from DHCP Range but never this that i have fix assigned with MAC Address.

 - Client-Identifier 0000.1234.0000.4321
 - Hardware-Address 0000.1234.0000.4321

if will change the Option from client-identifier <> Hardware-Address, i have the the same expiriences.

here me Example_

ip dhcp pool SRV_PRT_CH001
 host 192.168.1.11 255.255.255.240
 client-identifier 0011.321f.3092

ip dhcp pool Xerox
 host 192.168.1.12 255.255.255.240
 client-identifier 00AC.12Gf.2102

ip dhcp pool NAS
 host 192.168.1.13 255.255.255.240
 client-identifier abcd.0000.efgh.0000

ip dhcp pool CiscoAP
 host 192.168.1.14 255.255.255.240
 client-identifier 1234.abcd.5678.0000

Nothing DHCP Exclussion to this Static IP Adresses are set.

Please i don't see me Mistake, for any possible help i am Happy.

best Regards

Mauri

[johnlloyd_13]

hi,

could you use the keyword hardware-address instead?

ip dhcp pool SRV_PRT_CH001
 host 192.168.1.11 255.255.255.240
 hardware-address 0011.321f.3092

[mauric]

Hello

After troblehooting and play with the Option: clear arp-cache, and disconnect devices from the Switch, always the system will assign any free ip from DHCP Range but not this that i have fix assigned with MAC Address.

 - Client-Identifier 0000.1234.0000.4321
 - Hardware-Address 0000.1234.0000.4321

if changing the Option from client-identifier <> Hardware-Address, i have the the same result.

best regrads

Mauri

[Georg Pauwen]

Hello,

I think you need to add the Ethernet media type (01 for Ethernet) to the client identifier.

I have tried to convert the identifiers and added the leading 01, I am not sure if the conversion is right, but the 01 needs to be added.

client-identifier 00AC.12Gf.2102 --> 01AC.12Gf.2102

client-identifier abcd.0000.efgh.0000 --> 01ab.cd00.00ef.gh00

client-identifier 1234.abcd.5678.0000 --> 0112.34ab.cd56.7800

[mlund]

Hi

You are correct about client-identifier, but I think it is written in the format 0100.0012.3400.0043.21 if the hardware address is  0000.1234.0000.4321

/Mikael

[paul driver]

Hello

sh ip dhcp binding
debug ip dhcp server packet ( establish if user is using a client id or hardware address)

1.1.1.1/24 = mac address 1234.5678.9000

ip dhcp pool static
host 1.1.1.1 255.255.255.0
client-identifier 0112.3456.7890.00 ( 01 extension added to mac add of client)
default-router 1.1.1.254  < usually taken from primary dhcp pool but can be applied here also

or

ip dhcp pool static
host 1.1.1.1 255.255.255.0
hardware-address 1234.5678.9000 ieee802 <-- defined ieee network
default-router 1.1.1.254

res
Paul