The short version. EOL means the manufacturer is winding the product down. EOS means standard support entitlements stop. EOSL means the manufacturer will not service the hardware at all, for anyone, at any price.
The complication is that almost no two manufacturers use the same names for these milestones.
The three milestones
End of life (EOL)
The product is being retired. For most manufacturers this is the point at which it stops being sold. Cisco is a notable exception: for Cisco, End of Life is the announcement, and End of Sale is the date it actually stops selling.
End of support (EOS)
Standard support entitlements stop. Depending on the manufacturer this can mean the end of software updates, the end of contract renewals, or the end of the ability to attach a new support contract to hardware that is not already covered.
End of service life (EOSL)
The final milestone. No replacement parts, no firmware or security patches, no engineering escalation, no contract renewal. The manufacturer considers the product obsolete.
The gap between the first and last of these is usually years, not months, which is why knowing which milestone a platform has actually reached matters more than knowing it is somewhere in the lifecycle.
What each manufacturer calls the final milestone
| Manufacturer | Term used | Worth knowing |
|---|---|---|
| Dell EMC | End of Service Life (EOSL) | The term most of the industry has standardised on. |
| HPE | End of Service Life (EOSL) | Also applied to Nimble platforms acquired by HPE. |
| Cisco | Last Date of Support (LDoS) | Cisco publishes five milestones. End of Life is the announcement, End of Sale is when it stops selling, and two further dates govern service contracts before LDoS. |
| NetApp | End of Support (EOS) | Preceded by End of Availability (EOA), the last date NetApp accepts an order. EOS typically falls around five years after EOA. |
| IBM | End of Support (EOS) | Preceded by End of Marketing and End of Development, at which point patches and updates stop but parts continue. |
| Juniper | End of Support Life (EoSL) | Same milestone, different capitalisation. |
| Brocade | End of Support Life (EoSL) | Now published under Broadcom. |
Terminology verified against manufacturer lifecycle documentation. Where a manufacturer is not listed here, the date is still tracked on the manufacturer pages below.
Why these dates are hard to pin down
Each manufacturer publishes lifecycle dates through a different channel, uses different names for the same milestone, and works to a different timeline. A platform can be past end of sale and still fully supported, or still orderable as a spare while the software has already stopped receiving patches.
That fragmentation is why third party EOSL trackers are frequently wrong. In dates we have checked directly against manufacturer documentation, we have found published figures off by three to four months. For planning a refresh or a support renewal, a date that is a quarter out is not a rounding error.
Every date on the manufacturer pages below is verified against the manufacturer's own lifecycle documentation rather than aggregated from other trackers.
What happens after EOSL
The hardware keeps working. Arrays, switches and servers routinely run for years past their final support date. What ends is the manufacturer obligation, and in practice most organisations hit one of three things first: a renewal quote that has climbed steeply, a failure with no route to a replacement part, or an audit requirement for supported infrastructure.
Scale Service supports hardware after the manufacturer stops, across storage, compute, network and tape platforms.
Common questions
Is EOL the same as EOSL?
No. End of life means the product is being retired and usually no longer sold. End of service life is the final milestone, after which the manufacturer provides no parts, patches or support at all. The two are often years apart.
What does Cisco call EOSL?
Last Date of Support, written LDoS. Cisco also uses End of Life to mean the announcement rather than the end of sale, which is a common source of confusion when comparing Cisco dates with other manufacturers.
What does NetApp call EOSL?
End of Support, or EOS. It follows End of Availability, which is the last date NetApp will accept an order, typically by around five years.
Can I keep running hardware after EOSL?
Yes. EOSL is a support milestone, not a shutdown. The hardware continues to operate. What ends is the manufacturer obligation to supply parts, patches and engineering support.