Aironet 1142 Console Unavailable

iphoneguru27 · ‎04-05-2016

Hello all,

I am currently having difficulty configuring my AP. The Cisco Aironet 1142's that I bought from a working environment have been factory reset, and checked for issues throughly. That being said, I am unable to access the CLI from the console port, or through telnet. Whenever I try via telnet, I receive a 'no password set' error and termination. I've tried multiple cables, including the AIR-CONCAB1200 cable and a crossover cable from a friend, but had no luck. I would like to flash the image with an autonomous one, however I cannot even open a tftp session as I cannot get in. Has anyone else had this issue? Any help is greatly appreciated!

Peter Paluch · ‎04-05-2016

Hi,

With a lightweight firmware, it is possible that the console is unresponsive. The method for reverting a lightweight AP to autonomous mode is described in these two documents:

https://web.archive.org/web/20090124191043/http://cisco.com/en/US/docs/wireless/access_point/conversion/lwapp/upgrade/guide/lwapnote.html#wp160918

https://reggle.wordpress.com/2013/01/12/converting-a-cisco-lightweight-access-point-to-standalone-mode/

Check these out!

Best regards,
Peter

iphoneguru27 · ‎04-06-2016

I've tried the latter of the posts, but am confused. I've got the AP blinking red/orange now and that is in recovery mode. However, it won't bind to 10.0.0.1 so I can TFTP into it. I have the following configurations changed for my Router and Switch respectively.

Current configuration : 1149 bytes
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
!
hostname CISCO_R1
!
boot-start-marker
boot-end-marker
!
enable secret 5 $1$xrBZ$QZ.v510UOZgYXANqBZI/r/
enable password 7 0822455D0A16
!
clock timezone CDT -6
no aaa new-model
ip subnet-zero
ip cef
!
!
no ip domain lookup
ip dhcp excluded-address 10.0.0.1 10.0.0.4
!
ip dhcp pool DHCP_POOL
network 10.0.0.0 255.255.255.0
default-router 10.0.0.2
dns-server 10.0.0.2
domain-name ciscolab.local
!
!
!
!
!
interface Ethernet0/0
ip address 192.168.4.1 255.255.255.0
shutdown
full-duplex
!
interface Serial0/0
no ip address
shutdown
!
interface Ethernet0/1
ip address 10.0.0.2 255.255.255.0
full-duplex
!
ip default-gateway 10.0.0.2
ip http server
ip classless
!

Current configuration : 2127 bytes
!
version 12.1
no service pad
service timestamps debug uptime
service timestamps log uptime
service password-encryption
!
hostname CISCO_SW1
!
enable secret 5 $1$B9Ad$Wn9RObNmRPpXefwMZlUc01
enable password 7 060506324F41
!
ip subnet-zero
!
no ip domain-lookup
!
spanning-tree mode pvst
no spanning-tree optimize bpdu transmission
spanning-tree extend system-id
!
!
!
!
interface FastEthernet0/1
switchport access vlan 10
duplex full
!
interface FastEthernet0/2
switchport access vlan 10
duplex full
!
interface FastEthernet0/3
switchport access vlan 10
duplex full
!
interface FastEthernet0/4
switchport access vlan 10
duplex full
!
interface FastEthernet0/5
switchport access vlan 10
duplex full
!
interface FastEthernet0/6
switchport access vlan 10
duplex full
!
interface FastEthernet0/7
switchport access vlan 10
duplex full
!
interface FastEthernet0/8
switchport access vlan 10
duplex full
!
interface FastEthernet0/9
switchport access vlan 20
!
interface FastEthernet0/10
switchport access vlan 20
!
interface FastEthernet0/11
switchport access vlan 20
!
interface FastEthernet0/12
switchport access vlan 20
!
interface FastEthernet0/13
switchport access vlan 20
!
interface FastEthernet0/14
switchport access vlan 20
!
interface FastEthernet0/15
switchport access vlan 20
!
interface FastEthernet0/16
switchport access vlan 20
!
interface FastEthernet0/17
!
interface FastEthernet0/18
!
interface FastEthernet0/19
!
interface FastEthernet0/20
!
interface FastEthernet0/21
!
interface FastEthernet0/22
!
interface FastEthernet0/23
!
interface FastEthernet0/24
!
interface Vlan1
no ip address
no ip route-cache
shutdown
!
interface Vlan20
ip address 10.0.0.3 255.255.255.0
no ip route-cache
!
ip default-gateway 10.0.0.2
ip http server

Peter Paluch · ‎04-06-2016

Hello,

How do you know that the AP won't bind to 10.0.0.1? According to the documents, it will bind to this IP address on its own, without needing a DHCP server. The latter document mentioned that a static ARP may be needed on the TFTP server for the AP's IP/MAC because the AP did not respond to ARP requests.

Best regards,
Peter

iphoneguru27 · ‎04-06-2016

Will try this later today. I am unfamiliar with creating a static ARP on a TFTP server, though. I recently changed my configuration files to bind to the 10.0.0.0/24 network. Could there be an issue with my configuration files?

Also I believe it isn't binding to 10.0.0.1 due to my nmap probes and the fact that the TFTP transmission times out

Starting Nmap 6.40 ( http://nmap.org ) at 2016-04-06 09:09 CDT
Nmap scan report for 10.0.0.2
Host is up (0.0017s latency).
Not shown: 998 closed ports
PORT STATE SERVICE
23/tcp open telnet
80/tcp open http
MAC Address: 00:30:85:9D:7F:41 (Cisco Systems)

Nmap scan report for 10.0.0.3
Host is up (0.0024s latency).
Not shown: 998 closed ports
PORT STATE SERVICE
23/tcp open telnet
80/tcp open http
MAC Address: 00:1B:0D:78:AE:C0 (Cisco Systems)

Nmap scan report for 10.0.0.5
Host is up (0.000010s latency).
All 1000 scanned ports on 10.0.0.5 are closed

I have created a static arp using 'arp -s 10.0.0.1 MAC:ADDRESS' but to no avail.

iphoneguru27 · ‎04-06-2016

I tried tonight and havent made any progress. So far I have power-cycled the AP, and gotten it into recovery mode (blinking red). I have it plugged into PoE and then into a switch, IP 10.0.0.3. The switch is plugged into a router IP 10.0.0.2. The AP is supposedly going to bind to 10.0.0.1, so I added the static arp. I have the IOS files ready to go. All thats left is that I still cannot connect to the AP. Should I just directly plug my computer into the AP, i.e. LAN port on PoE?

Edit: The TFTP server is on 10.0.0.5. I have a PC connected to the switch. I cannot ping the AP, or see it in any NMAP procedure.

iphoneguru27 · ‎04-06-2016

Any ideas?

johnlloyd_13 · ‎04-06-2016

hi,

what terminal emulation software did you use?

try using putty when connecting via console.

iphoneguru27 · ‎04-06-2016

I have been using minicom on xubuntu. I have tried putty but it still doesn't respond for the access point. I have access to my Router and Switch with either minicom or putty, so the program isn't the issue.