Cisco Switch Catalyst 9500

About the Catalyst 9500 Series

The Cisco Catalyst 9500 Series is the fixed-configuration core and aggregation platform of
the Catalyst campus family. Where a Catalyst 9300 sits in the wiring closet, the 9500 sits
one layer up — it aggregates a building's access switches and feeds the campus core or the
data centre, which is why every model in the range starts at 10G and goes up to 100G.

Two things separate the models in this range:

• The port layout — recorded in the model number. 12Q, 24Q and 32QC
  are 40G/100G-only platforms for spine roles; 16X, 24X, 40X and 48X are
  10G platforms for aggregation; the Y4C models (24Y4C, 48Y4C) are multirate —
  each port runs 1G, 10G or 25G, plus four 40/100G uplinks of their own.


• The software licence — recorded as the final letter. A is Network
  Advantage, E is Network Essentials.

All models are 1U fixed platforms with the same Catalyst IOS-XE software, the same
StackWise Virtual capability for pairing switches into one logical unit, and the same
optional network module slot — the C9500-NM-8X, which adds eight more 10G ports
without changing chassis.

How to Choose a Catalyst 9500 Model

1. How fast do the access ports need to be?

• 1G/10G aggregation — the 16X / 24X / 40X / 48X platforms, where the
  numbered ports are 10G SFP+ and the copper traffic arrives from 9300s below.


• 10G and 25G in the same chassis — the 24Y4C and 48Y4C. Every
  numbered port takes 1G, 10G or 25G optics, so the same switch serves a 10G today and a
  25G access layer tomorrow. This is the most flexible choice in the range.


• High-density 40G/100G — the 12Q / 24Q / 32QC models, intended as spine
  switches or as core devices where the traffic arriving is already aggregated.


• Pure 100G — the 32C, a 32-port 100G-only platform.

2. Do you need an uplink set beyond the numbered ports?

Several models carry dedicated uplink ports in addition to their access ports — for example
C9500-16X-2Q-A (16 x 10G access plus 2 x 40G uplinks) and C9500-40X-2Q-A
(40 x 10G plus 2 x 40G). Where the switch is the last hop before a 40G or 100G spine, these
bundle models save you from spending access ports on uplinks.

3. Which licence?

Network Essentials (E) covers the Layer 2 and basic Layer 3 feature set, including
routing, VRF-lite and StackWise Virtual. Network Advantage (A) adds the advanced
features — full Layer 3 routing protocols, SD-Access fabric membership, advanced security
and network virtualisation. Match the licence to the role: an aggregation switch that only
forwards does not need Advantage; a switch that will carry VRFs, participate in a fabric or
terminate routing domains does.

4. Copper or fibre access ports?

The Catalyst 9500 is predominantly a fibre platform — the numbered access ports take SFP+
or QSFP optics. Where you need to connect copper devices directly, either combine a 9500 as
the aggregation tier with 9300 access switches beneath it, or use one of the multirate
Y4C models and populate with the appropriate transceivers.

5. Do you need the expansion module or SSD?

The C9500-NM-8X network module adds 8 x 10GE ports to any Catalyst 9500 with a
spare module slot, which is usually cheaper than moving up a chassis size. The
C9K-F1-SSD-240G is a 240 GB pluggable SSD used for application hosting, logs and
tracing on the switch itself.

Catalyst 9500 Model Comparison

Prices are our current selling prices in US dollars, excluding shipping.
Click a model number for the full specification table and availability.

Expansion options

Frequently Asked Questions

What is the difference between the Catalyst 9500 and the Catalyst 9300?

They sit at different layers. The 9300 is a stackable access switch — it connects
endpoints such as phones, cameras, access points and PCs. The 9500 is a
fixed-configuration aggregation and core platform: it connects the 9300s together and runs
at 10G, 25G, 40G or 100G. A typical campus design uses 9300s in the closets and 9500s as the
building or campus aggregation layer.

Advantage or Essentials — how do I decide?

Essentials covers Layer 2 plus basic Layer 3, VRF-lite and StackWise Virtual. Advantage
adds full routing protocols, SD-Access fabric membership, advanced security and network
virtualisation. Choose Advantage if the switch will run routing protocols, join a
fabric, or host VRFs; choose Essentials where it only aggregates and forwards. The
licence is indicated by the last letter of the model number — -A or
-E.

Can two Catalyst 9500s be combined into one logical switch?

Yes, using StackWise Virtual, which pairs two chassis into a single logical device
for management and forwarding. Note that this is a different mechanism from the StackWise
cabling used on the Catalyst 9300 access switches — the two are not interchangeable and the
9500 pair uses its own uplink ports.

What do the "Y4C" models give me that the "X" models do not?

Multirate access ports. On C9500-24Y4C and C9500-48Y4C, each numbered port
accepts a 1G, 10G or 25G transceiver, and the four additional ports run at 40G or 100G. That
means a single chassis can serve a 10G access layer today and be re-populated with 25G
optics later without replacing the switch. The X models are fixed at 10G on the
numbered ports.

How many 10G ports can I add without changing chassis?

Eight. The C9500-NM-8X network module fits the spare module slot and adds 8 x 10GE
ports. It is listed in the expansion table above. If you need more than one module's worth
of additional ports, it is usually more economical to move to a larger fixed model or to a
second chassis.

Do you supply the transceivers and stacking cables as well?

Yes. Give us the model and tell us the distances between cabinets or buildings and we will
quote the correct optics and cabling alongside the switches.