Hi Robert,
I have disabled the Windows firewall and the connectivity problem has gone, thank you very much.
For the upgrading procedure I have been able to upgrade this switch (JL253A) using the procedure you explained, however, I haven't been able to upgrade my other switch (JL259A) to the same version. This is the output:
SW-ACCESS1# copy tftp flash 10.115.70.10 WC_16_03_0007.swi primary
The primary image will be deleted.
Continue (y/n)? y
020M
Validating and Writing System Software to the Filesystem ...
SW-ACCESS1# show flash
Image Size (bytes) Date Version
----------------- ------------ -------- --------------
Primary Image : 20530856 10/26/16 WC.16.02.0014
Secondary Image : 20530856 10/26/16 WC.16.02.0014
Boot ROM Version
----------------
Primary Boot ROM Version : WC.16.01.0003
Secondary Boot ROM Version : WC.16.01.0003
Default Boot Image : Primary
Default Boot ROM : Primary
SW-ACCESS1#
I don't know but the new software is not loaded into the primary flash, but the console doesn't throw any error. I have tried with the secondary flash and with the same result.
What could be the problem? Any workaround?
Regards,
Julián