02-23-2017 01:49 PM
How do I validate the compatibility of an old NEC 300 running FOS 5.3 with a 48K running 6.4.3c and an 8510 on 7.1.1? I'm looking to upgrade the FOS on the 48K and 8510 but I'm concerned it will break the ISL link.
03-03-2017 12:17 AM
Read the release note of the higher FOS version you would like to implement and check the compatibility with older versions.