Controller 4400 Internal DHCP

[fabianoleso]

Hy, I have a wireless controller 4400 and I am using internal DHCP.I am unable to receive a IP address from the switch connected to the controller.

Thr debug messages are:

DHCP Op: BOOTREQUEST(1), IP len: 300, switchport: 1, encap: 0xec00

Tue Sep 5 08:07:31 2006: 00:01:03:8d:43:5f dhcp option len, including the magic cookie = 64

Tue Sep 5 08:07:31 2006: 00:01:03:8d:43:5f dhcp option: received DHCP DISCOVER msg

Tue Sep 5 08:07:31 2006: 00:01:03:8d:43:5f dhcp option: skipping option 116, len 1

Tue Sep 5 08:07:31 2006: 00:01:03:8d:43:5f dhcp option: skipping option 61, len 7

Tue Sep 5 08:07:31 2006: 00:01:03:8d:43:5f dhcp option: requested ip = 10.0.10.30

Tue Sep 5 08:07:31 2006: 00:01:03:8d:43:5f dhcp option: skipping option 12, len 4

Tue Sep 5 08:07:31 2006: 00:01:03:8d:43:5f dhcp option: vendor class id = MSFT 5.0 (len 😎

Tue Sep 5 08:07:31 2006: 00:01:03:8d:43:5f dhcp option: skipping option 55, len 11

Tue Sep 5 08:07:31 2006: 00:01:03:8d:43:5f dhcpParseOptions: options end, len 64, actual 64

Tue Sep 5 08:07:31 2006: 00:01:03:8d:43:5f dhcpProxy: Dropping packet (no mscb) from STA 00:01:03:8d:43:5f, giaddr:0.0.0.0, udpSrcPort:68, op:1

Tue Sep 5 08:07:39 2006: 00:01:03:8d:43:5f dhcpProxy: Received packet: Client 00:01:03:8d:43:5f

------------------------

someboby can help me???

Thanks

[drees]

Make sure you have trunking setup correctly on the switch if you have multiple vlans. I've seen issues if you don't have this setup correctly. Also make sure that the scope is setup for the vlan that is requesting the address. If you specify the vlan on the controller, don't set a native vlan on the switchport's trunking configuration.

HTH,

Dave

[ankbhasi]

Hi Friend,

Can you please update if you have specified your magnagement ip address under DHCP address under interface screen.

While configuring interface there is an option where you specify the dhcp server ip address. Can you check and confirm.

Regards,

Ankur

[drees]

Yes, typically the IP address for the DHCP server is the management interface. You typically would not want to specify an interface that associates with a WLAN as it could be removed and break DHCP.

[segopala]

Hi ,

check the ip helper address it should be pointed to the mangement ip address of the controller

regards

Seema

[fabianoleso]

Thanks a lot...

So I am using GUI interface of controller in the task Controller--> Internal DHCP SERVER.

In this task I am unable to bind the DHCP scope to the management interface

[segopala]

hi ,

you have to create a scope for that vlan and on management interace for dhcp server give management ip address ;

so a sample cli to create scope is :

config dhcp create-scope 53

config dhcp address-pool 53 10.50.53.100 10.50.53.200

config dhcp default-router 53 10.50.53.1

config dhcp dns-servers 53 10.50.1.21

config dhcp domain 53 blr.airesace.com

config dhcp lease 53 120

config dhcp netbios-name-server 53 10.50.1.21

config dhcp network 53 10.50.53.0 255.255.255.0

config dhcp proxy enable

config dhcp enable 53

let me know if you face any problem ; send me the screen shot of the error

regards

seema

[fabianoleso]

thanks a lot!!!!