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Cisco AP 1131AG - Problem with assign IP

Hello

I have a Cisco AP 1131Ag with ip 192.168.1.100 and mask 255.255.255.0

ANd two laptops with PCI WIRELESS a/g

I have configurated a Ap with SSID : Ciscoap2010 , no security,no vlan

1.When a laptop detect new wireless,it show "other networks" but doesnt show "Ciscoap2010"

2. When in this laptop i have connected to "other network" and i execute start -> execute -> cmd and execute ipconfig shows 169.254.3.116 and mask 255.255.255.0... and doesnt show 192.168.1.XX and mask 255.255.255.0

Why doesnt show a ip in the range 192.168.1.1 to 192.168.1.254 exception 192.168.1.100

Thanks

5 REPLIES
Cisco Employee

Re: Cisco AP 1131AG - Problem with assign IP

Hi Roberto,

1) Because you didn't broadcast the SSID. Try typing "guest-mode" in the ssid configuration.

2) Mostly because you didn't configure a dhcp pool I guess ? Having the AP having an ip address is not enough for it to hand over ip addresses to clients.

Hope this helps.

Nicolas

===

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Community Member

Re: Cisco AP 1131AG - Problem with assign IP

Hi Nicolas

i did this steps:

1. choose SSID Ciscot2010 and selection SSID broadcast beacon

later in a laptop show "Ciscot2010" and "other networks" too... and it was the same networks... i dont know why it?

2. i havent configured the Ap to act as a DHCP server... only configured IP: 192.168.1.100,mask 255.255.255.0 and gateway 0.0.0.0

I want that the Ap assigns ip to my two laptops but i dont know it....

Also, i dont understand about "Exclude the wireless devices IP address from the range of adresses the wireless devices assigns"

3.Also i dont understand this example

AP(config)# ip dhcp exclude-address 172.16.1.1 172.16.1.20

this example means that if i configure in my AP this line command then each laptop receive a IP of this range?

Thanks

Cisco Employee

Re: Cisco AP 1131AG - Problem with assign IP

1. If this happened immediately after, it's normal. The laptop software still remembers "other network" and still displays it. It should go away.

If it doesn't, then it means it's another network than yours ... :-)

2. http://www.cisco.com/en/US/customer/docs/wireless/access_point/12.3_7_JA/configuration/guide/s37adm.html#wp1090319

3. The command "ip dhcp excluded-address" means that out of the whole range, the AP won't hand over this particular ip address. In usual cases, you configure a whole subnet as DHCP pool but you exclude the AP ip address and the switch/gateway ip address from that pool so that no clients can get those 2 ips.

Hope it clarifies.

Nicolas

===

Don't forget to rate answers that you find useful

Community Member

Re: Cisco AP 1131AG - Problem with assign IP

Thanks Nicolas

1.The link http://www.cisco.com/en/US/customer/docs/wireless/access_point/12.3_7_JA/configuration/guide/s37adm.html#wp1090319 doesnt valid....

2.Please do you can help me please in my case...

In this moment the AP have ip:192.168.1.100 and mask 255.255.255.0 and gateway 0.0.0.0

SSID :Ciscot2010 and no security....

What is the proccedure for AP act as DHCP?... What should i do in this case?

I hace a destokp wich management the AP,this destokp ip 192.168.1.2,mask 255.255.255.0

I want that AP give ip and mask to laptops.

Do you give me a example of it....

Thanks

Cisco Employee

Re: Cisco AP 1131AG - Problem with assign IP

You can also just search for the AP config guide on cisco.com to reach the link I put.

A copy/paste of the content :

Configuring the Access Point to Provide DHCP Service

These sections describe how to configure the wireless device to act as a DHCP server:

Setting up the DHCP Server

Monitoring and Maintaining the DHCP Server Access Point

Setting up the DHCP Server

By default, access points are configured to receive IP settings from a DHCP server on your network. You can also configure an access point to act as a DHCP server to assign IP settings to devices on both your wired and wireless LANs.

The 1100 series access point becomes a mini-DHCP server by default when it is configured with factory default settings and it cannot receive IP settings from a DHCP server. As a mini-DHCP server, the 1100 series access point provides up to 20 IP addresses between 10.0.0.11 and 10.0.0.30 to a PC connected to its Ethernet port and to wireless client devices configured to use no SSID, and with all security settings disabled. The mini-DHCP server feature is disabled automatically when you assign a static IP address to the 1100 series access point. Because it has a console port to simplify initial setup, the 1200 series access point does not become a DHCP server automatically.


Note When you configure the access point as a DHCP server, it assigns IP addresses to devices on its subnet. The devices communicate with other devices on the subnet but not beyond it. If data needs to be passed beyond the subnet, you must assign a default router. The IP address of the default router should be on the same subnet as the access point configured as the DHCP server.


For detailed information on DHCP-related commands and options, refer to the Configuring DHCP chapter in the Cisco IOS IP Configuration Guide, Release 12.3. Click this URL to browse to the "Configuring DHCP" chapter:

http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fipr_c/ipcprt1/1cfdhcp.htm

Beginning in privileged EXEC mode, follow these steps to configure an access point to provide DHCP service and specify a default router:

Command
Purpose

Step 1

configure terminal

Enter global configuration mode.

Step 2

ip dhcp excluded-addresslow_address [high_address ]

Exclude the wireless device's IP address from the range of addresses the wireless device assigns. Enter the IP address in four groups of characters, such as 10.91.6.158.

the wireless device assumes that all IP addresses in a DHCP address pool subnet are available for assigning to DHCP clients. You must specify the IP addresses that the DHCP Server should not assign to clients.

(Optional) To enter a range of excluded addresses, enter the address at the low end of the range followed by the address at the high end of the range.

Step 3

ip dhcp poolpool_name

Create a name for the pool of IP addresses that the wireless device assigns in response to DHCP requests, and enter DHCP configuration mode.

Step 4

networksubnet_number
[
mask | prefix-length]

Assign the subnet number for the address pool. The wireless device assigns IP addresses within this subnet.

(Optional) Assign a subnet mask for the address pool, or specify the number of bits that comprise the address prefix. The prefix is an alternative way of assigning the network mask. The prefix length must be preceded by a forward slash (/).

Step 5

lease { days [ hours ] [ minutes ] |
infinite }

Configure the duration of the lease for IP addresses assigned by the wireless device.

days—configure the lease duration in number of days

(optional) hours—configure the lease duration in number of hours

(optional) minutes—configure the lease duration in number of minutes

infinite—set the lease duration to infinite

Step 6

default-routeraddress [address2 ... address 8]

Specify the IP address of the default router for DHCP clients on the subnet. One IP address is required; however, you can specify up to eight addresses in one command line.

Step 7

end

Return to privileged EXEC mode.

Step 8

show running-config

Verify your entries.

Step 9

copy running-config startup-config

(Optional) Save your entries in the configuration file.

Use the no form of these commands to return to default settings.

This example shows how to configure the wireless device as a DHCP server, exclude a range of IP address, and assign a default router:

AP# configure terminal
AP(config)# ip dhcp excluded-address 172.16.1.1 172.16.1.20
AP(config)# ip dhcp pool wishbone
AP(dhcp-config)# network 172.16.1.0 255.255.255.0
AP(dhcp-config)# lease 10
AP(dhcp-config)# default-router 172.16.1.1
AP(dhcp-config)# end

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