TFTP problem on Cat2948G

snakayama · ‎06-20-2005

Hi everyone,

I have encountered TFTP problem on Cat2948G.

There are two Cat2948Gs on same VLAN segment and both Cat2948Gs are operating same CatOS version 8.3(2)GLX.

In this situation, one of Cat2948G can upload its configuration file to TFTP server. This Cat2948G's hostname is SW130-4D31, and the file name that TFTP server restored to its dedicated directory is SW130-4D31-confg.

But another one can not upload its configuration file to TFTP server.

This Cat2948G's hostname is SW130-4D32, and the file name that TFTP restored to its dedicated directory is SW130-4D32-confg.

TFTP server is UNIX machine (SUN) and the content of directory that TFTP server restored those uploaded configuration file is as follows,

-rw-rw-rw- SW130-4D31-confg

-rw-rw-rw- SW130-4D32-confg

Both file already exist and have same permission (666).

The following output is the console message when "write net" and "copy config tftp" command executed on failed Cat2948G.

SW130-4D32> (enable) wr net

This command shows non-default configurations only.

Use 'write network all' to show both default and non-default

configurations.

IP address or name of remote host? [192.168.10.70]

Name of configuration file?[SW130-4D32-confg]

Upload configuration to SW130-4D32-confg on 192.168.10.70 (y/n) [n]? y

.................

.............................

..

TFTP connection fail(-2).

TFTP: Abnormal Termination

SW130-4D32> (enable) copy config tftp

This command uploads non-default configurations only.

Use 'copy config tftp all' to upload both default and non-default

configurations.

IP address or name of remote host [192.168.10.70]?

Name of file to copy to [SW130-4D32-confg]?

Upload configuration to tftp:SW130-4D32-confg, (y/n) [n]? y

.................

.............................

..

TFTP connection fail(-2).

Write file tftp:SW130-4D32-confg error (TFTP write error)

Cannot write buffer to file

Cannot copy from config: to tftp:SW130-4D32-confg

The result of both command indicates TFTP connection failed with error code (-2).

I have investigated CCO Bug Navigator, field notice and Release note, but I don't find any useful, related information to isolate or resolve this

problem.

If you have any useful information please let me know.

Your information would be very appreciated.

Thank you in advance

alfredshum · ‎06-20-2005

Can you ping to the server?

Is there any firewall/ACL blocking the tftp traffic to and from that specific switch?

Do you have multiple L3 interfaces with IP addresses on that switch? Can you ping from the TFTP server to all of these L3 interfaces?

One quick test is to plug a PC (Windows! make it as dummy as possible) into the same subnet of your TFTP server and run tftpd32 or Solarwind TFTP server or whatever you think it's a good TFTP server. Then try using this new server with the problematic switch.

snakayama · ‎06-20-2005

Thank you very much for your advise.

The followings are the result of test.

ping from problematic Cat2948G to TFTP server was OK.

No any access filter or firewall which block TFTP traffic from

problematic Cat2948G exist.

TFTP between problematic Cat2948G and newly set up TFTP server

was failure, but returned error code was (-1) not (-2).

However TFTP between another Cisco device and newly set up TFTP

server was OK. So newly set up TFTP server worked fine.

The following message is the console log when executed TFTP

between problematic Cat2948G and newly set up TFTP server.

SW130-4D32> (enable) wr net

This command shows non-default configurations only.

Use 'write network all' to show both default and non-default configurations. IP address or name of remote host? [192.168.10.70] 192.168.10.29 Name of configuration file?[SW130-4D32-confg]

Upload configuration to SW130-4D32-confg on 192.168.10.29 (y/n) [n]? y .................

.............................

..

No response from host.

TFTP connection fail(-1).

TFTP: Abnormal Termination

SW130-4D32> (enable) wr net

This command shows non-default configurations only.

Use 'write network all' to show both default and non-default configurations. IP address or name of remote host? [192.168.10.29]

Name of configuration file?[SW130-4D32-confg]

Upload configuration to SW130-4D32-confg on 192.168.10.29 (y/n) [n]? y .................

.............................

..

No response from host.

TFTP connection fail(-1).

TFTP: Abnormal Termination

TFTP between problematic Cat2948G and TFTP server (SUN UNIX machine)

had succeeded in the past. And this problem has occurred suddenly.

Thank you in advance.

Best regards,

alfredshum · ‎06-20-2005

are you running the same CatOS version on both switches? Are there any changes applied to this problematic switch recently?

Did you try to reboot the switch and try tftp again?

glen.grant · ‎06-21-2005

Make sure you don't have any blank spaces in the name at the end , either in the switch or the tftp file that you created on the unix server . Try deleteing the file on the unix server and recreating it taking care to make sure that there is no blank spaces at the end of the file name .