According to Cisco Systems the error “socket SO_UDPCHECKSUM option setting failed error” has no negative impact on the Cisco Catalyst 6500 series Switch. The work around is to remove IP SLA configuration or upgrade the IOS version.

This error appeared for the first time in the IOS version 12.2(33)SXI1 and this bug is fixed in following IOS versions

12.2(32.8.11)SX291
12.2(32.8.11)XJC273.11
12.2(33.2.4)SXI
12.2(32.8.1)YCA273.15
12.2(33)SXI3
12.2(32.8.15)YCA273.10
12.2(33)SXI4
15.0(1)SY

So if you happen to see the following error in your Cisco Catalyst 6500 Series switch don’t panic, the bug has least impact on device the only work around is either to remove the IP SLA or to upgrade the IOS of the device.

In my last post we looked at how to fix the corrupted IOS in a Cisco 1250 Wireless Access Point, the other way of recovering the corrupted IOS is by again by using a solar winds TFTP server, but in this procedure the access point loads itself the image file from the TFTP server. In order do so follow the below mentioned steps.

Step 1

Configure the PC with Solar Winds TFTP server with a class A Static IP Address range of 10.0.0.2 to 10.0.0.30.

Step 2

Make sure that the PC with the solar winds TFTF server contains the Cisco 1250 Wireless Access Point IOS image file (such as c1250-k9w7-tar.124-21a.JA1 in the Solar Winds TFTP server folder) and the TFTP server is activated.

Step 3

Rename the Cisco 1250 Wireless Access Point IOS image file in the solar winds TFTP server folder to the default image name –c1250-k9w7-tar.default for a Cisco 1250 Wireless Access Point.

Step 4

Connect the PC with solar winds TFTF server to the Cisco 1250 Access point with a  Category 6or Cat5 Ethernet cable (straight cable).

Step 5

Disconnect power from the Cisco 1250 Access point.

Step 6

Press and hold the MODE button while you reconnect power to the Cisco 1250 Access point.

Step 7

 Hold the MODE button until the status LED turns red (approximately 20 to 30 seconds), and release the MODE button until the console indicates

Button is pressed; wait for button to be released

Once you release the button you will see the Cisco 1250 Access Point starts downloading the default IOS image from Solar wind TFTP sever as shown below

Step 8

Wait until the Cisco 1250 access point reboots as indicated by all LEDs turning green followed by the Status LED blinking green.

Step 9

After the Cisco 1250 access point reboots, reconfigure the access point using the Command Line Interface (CLI) or GUI.

Also check demonstrated video to recover the IOS in Cisco 1250 Access Point.

 [kml_flashembed movie="http://www.youtube.com/v/ixv_Gmzpvwk" width="425" height="350" wmode="transparent" /]

In my previous post  I was talking about how to fix the corrupted IOS in Cisco 1250 Series Wireless Access Point. Now in this series let’s see how to fix the solution to fix the corrupted IOS in Cisco 1250 Series Wireless Access Point.

In the previous post we know that whenever an IOS is missing in the Cisco Wireless Access Point you will get the following error

The system is unable to boot automatically because there are no bootable files.

Followed by the promt

ap:

There are two ways to fix this problem, in this post I will show you how to fix the problem   by transferring the IOS file to the Cisco Access Point using a TFTP server.

Whenever you boot you IOS corrupted Cisco Access Point and when you get following error at the command prompt

ap:

Connect the corrupted access point to any Cisco Catalyst Switch and also connect your PC with a solar winds TFTP server installed to the same switch with the same subnet. In the following example we are configuring the IP address for the PC with Solar winds TFTP server and corrupted access point as follows

Follow the below mentioned steps

Step 1:

Assign the ip address, netmask and default gateway to the IOS corrupted access point by using set command as shown below.

ap:set IP_ADDR 10.0.0.10

ap:set NETMASK 255.255.248.0

ap:set DEFAULT_ROUTER 10.0.0.10

Step 2:

Initialized the TFTP server in the Cisco Access point by entering “tftp_init” command

ap: tftp_init

 Step 3:

Download the IOS image file for Cisco 1250 Series Access Point from Cisco Web Site (CCO id is required) and remove the file extension (.tar) as shown and copy the file to solar winds TFTP server directory.

Step 4:

Make sure that the solar winds TFTF server is started and the downloaded the IOS image file is placed in the TFTP server directory.

Step 5:

Extract the IOS file downloaded into the Cisco Access Point by using “tar -xtract” command to inflate the image file from your TFTP Server.

ap:  tar –xtract  tftp://10.0.0.8/c1250-k9w7-tar.124-10b.JDA3 flash:

Step 6:

Once the whole IOS file is extracted the set the boot path in your IOS corrupted Cisco Access Point as shown below

ap:  set BOOT flash: c1250-k9w7-mx.124-10b.JDA3/ c1250-k9w7-mx.124-10b.JDA3

Step 7:

Then you boot your Cisco Wireless Access Point by using a “boot’ command.

ap:  boot

Once the Cisco Wireless Access Point is booted you will see no errors and its working fine. I have also uploaded the video as well which might help you to recover the IOS in a Cisco 1250 Access Point. Same procedure can be applied on other Cisco Access Points as well with proper IOS files. 

 [kml_flashembed movie="http://www.youtube.com/v/NfSZeq4idHM" width="425" height="350" wmode="transparent" /]

These days we are upgrading the IOS for all Cisco 1250 Series Wireless Access Points. So far we don’t have any wireless management software or control cards. We are force to upgrade an IOS of each and every individual access point.

One of our aspiring, vibrant colleagues deleted the flash contents of the Cisco 1250 Series Access Point accidentally. He tried to repair but he had no clue what to do. He tried to find out a way but it was fruitless. After the IOS was deleted in the Cisco 1250 Series Access Point it was not booting and he was getting the following error.

The system is unable to boot automatically because there are no bootable files.

In upcoming post I will post a solution to how to upload an IOS in the corrupted Cisco 1250 Access Point.

[kml_flashembed movie="http://www.youtube.com/v/EMG8UosnSU0" width="425" height="350" wmode="transparent" /]

First and foremost is the TFTP server. The main problem you face is the file size limitations with the TFTP servers. Most of the TFTP servers won’t support more than 30 MB of IOS file to transfer. At that time I was using Solar Winds TFTP server which is an excellent software but cannot support more than 30 MB. The IOS transfer failed exactly after 30 MB of transfer. I was worried what might be the problem, after careful observation I figured out the problem lies with the Solar Winds TFTP server .Then I tried Cisco’s old TFTP server but the same problem. Later on I figured out TFTP server can support more than 30 MB of file transfer.

Hence after changing to 3Coms 3CDaemon Server  &  PacketTrap pt360 Tool Suite FREE edition I could able to transfer the IOS files more than 30 MB. So the main point is to make sure your TFTP server can support more than 30 MB of file transfer as always the image file for Cisco Catalyst 6513 Switch is more than 30 MB in size. Presonally I would recommend the TFTP server from PacketTRAP pt360  Tool Suite

Things to be considered for IOS upgrade series 2