C3750X-24-S-E=

C3750X-24-S-E= is a Cisco Catalyst legacy switching licence. It is software rather than hardware, so nothing ships: a key or entitlement is applied to equipment you already have. The catalogue describes it as Cisco 3750-X License C3750X-24-S-E= C3750X-24 IP Base to IP Services Paper License.

Before you go any further: this licence is for a platform the vendor no longer supports. Support for these Catalyst families ended between 2021 and 2026. We have left the listing up because people do still search for these part numbers, usually while working out what they have or what to do about it, and a page that tells you the truth is more use than a dead link.

What that means in practice. The licence may still function on equipment already running, because a perpetual licence does not stop working when support ends. What you cannot get is a software fix, a security patch, a hardware replacement under contract, or help from the vendor when something breaks. On anything carrying traffic that matters, or anything exposed to a network you do not control, that is the real risk rather than the licence itself.

What we would rather do than sell you this. Tell us what the equipment is actually doing and we will tell you what the current equivalent is and roughly what replacing it involves. If you are keeping the platform deliberately, which is a legitimate decision in plenty of cases, we can often still source licences and spares from secondary channels, and we would rather you heard the trade-off from us than discovered it later.

Note that this is a paper licence part number, fulfilled as a physical certificate rather than an electronic entitlement. The electronic equivalent is normally a separate part number, and for most buyers electronic delivery is quicker and easier to keep track of.

How these switches were licensed. Cisco sold this generation of Catalyst in feature tiers, typically LAN Base, IP Base and IP Services, with the more capable routing and multicast features reserved for the higher tiers. The licences in this family are either the tier itself or an upgrade from one tier to the next, and because the software was the same image throughout, the upgrade was a licence rather than a new install. Current Catalyst switches use subscription tiers instead, which is why these part numbers have no direct equivalent in today’s catalogue.

Green Code Technologies supplies Cisco and Huawei equipment and licences alongside HPE, Dell, Samsung and Netgear. We would rather tell you a part is no longer supported, or that we need to check it, than take an order for something that will not do what you need. Send us the platform, the software release and what you are trying to achieve and we will come back with a straight answer.