C9500-24Y4C-E – 24×1/10/25G SFP28 – 4×40/100G QSFP28

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C9500-24Y4C-E Description

The C9500-24Y4C-E is a Cisco Catalyst 9500 Series high-performance fixed switch with Network Essentials for campus distribution blocks that need 25G fiber access with 100G uplinks. The switch has 24 1G/10G/25G SFP28 ports, four fixed 40G/100G QSFP28 uplinks, 2.0 Tbps of switching capacity, 1 Bpps of forwarding and 82,000 MAC addresses. Network Essentials covers Layer 2 and routed access with OSPF up to 1,000 routes, and the switch takes no network module.

Quick Specs

Parameter

Specification

Product ID

C9500-24Y4C-E

Product type

High-performance fixed core and aggregation switch

Network license

Network Essentials

Port configuration

24 x 1G/10G/25G SFP28 ports and 4 x 40G/100G fixed uplinks

SFP28 ports

24 ports, 25G/10G/1G capable

Fixed uplink ports

4 x 40G/100G QSFP uplinks

Switching capacity

Up to 2.0 Tbps

Forwarding rate

Up to 1 Bpps

Default power supply

C9K-PWR-650WAC-R 650W AC

Power supply slots

2

Power supply options

C9K-PWR-650WAC-R, C9K-PWR-650WACL-R, C9K-PWR-930WDC-R

Fan modules

C9K-T1-FANTRAY, up to 4 fans

Minimum software release

Cisco IOS XE Fuji 16.8.1a

Product Performance

Switching Capacity
Forwarding Rate
25G SFP28 Access Density

Key Features

24 SFP28 Ports At 1G, 10G Or 25G

Each of the 24 downlink ports negotiates 1G, 10G or 25G, so a fiber plant can move from 10G to 25G without a chassis change.

Four Fixed QSFP28 Uplinks

The uplinks run at 40G or 100G and are built into the chassis, since the platform accepts neither the C9500-NM-8X nor the C9500-NM-2Q.

Network Essentials Feature Scope

Network Essentials includes Layer 2, routed access with RIP, EIGRP Stub and OSPF up to 1,000 routes, and MACsec-128.

UADP 3.0 Table Scale

The UADP 3.0 ASIC switches up to 2.0 Tbps and holds 82,000 MAC addresses and 256,000 IPv4 routes.

Dual Supply Slots

Two slots accept the 650W AC, 650W AC low-voltage or 930W DC supply, and the C9K-T1-FANTRAY cools the chassis with up to four fans.

Cisco IOS XE 16.8.1a Minimum

The hardware needs Cisco IOS XE Fuji 16.8.1a or later and has 16 GB of DRAM and 16 GB of flash.

Application Scenarios

25G Aggregation With 100G Uplinks

A campus aggregation block connects 25G fiber links from access switches on the SFP28 ports and carries the traffic to the core over the fixed 40G or 100G uplinks.

Routed Access Distribution

A distribution layer that routes with OSPF toward the access switches terminates those links on the switch under Network Essentials.

25G Server Row Aggregation

A small data center row connects 25G hosts to the 24 SFP28 ports and sends the traffic upstream through the QSFP28 uplinks.

Product Comparison

Parameter

C9500-24Y4C-E

C9500-24Y4C-A

C9500-48Y4C-E

Network license

Network Essentials

Network Advantage

Network Essentials

Downlink ports

24 x 1G/10G/25G SFP28

24 x 1G/10G/25G SFP28

48 x 1G/10G/25G SFP28

Uplink ports

4 x 40G/100G QSFP28, no network module

4 x 40G/100G QSFP28, no network module

4 x 40G/100G QSFP28, no network module

Switching capacity

Up to 2.0 Tbps

Up to 2.0 Tbps

Up to 3.2 Tbps

Forwarding rate

Up to 1 Bpps

Up to 1 Bpps

Up to 1 Bpps

MAC addresses

Up to 82,000

Up to 82,000

Up to 82,000

Default power supply

C9K-PWR-650WAC-R 650W AC

C9K-PWR-650WAC-R 650W AC

C9K-PWR-650WAC-R 650W AC

Power supply options

C9K-PWR-650WAC-R, C9K-PWR-650WACL-R, C9K-PWR-930WDC-R

C9K-PWR-650WAC-R, C9K-PWR-650WACL-R, C9K-PWR-930WDC-R

C9K-PWR-650WAC-R, C9K-PWR-650WACL-R, C9K-PWR-930WDC-R

C9500-24Y4C-E and C9500-24Y4C-A are the same 24-port 25G hardware with four fixed 40G/100G QSFP28 uplinks, and C9500-24Y4C-E carries Network Essentials, which covers Layer 2 and routed access with OSPF up to 1,000 routes. Designs that need full BGP routing, VXLAN, BGP-EVPN, StackWise Virtual or MACsec-256 must order C9500-24Y4C-A, or move an Essentials switch up with the C9500-DNA-24Y4CEA upgrade license. More than 24 SFP28 access ports calls for C9500-48Y4C-E, which has 48 ports and up to 3.2 Tbps with the same uplinks and power options. Neither 24-port model takes a C9500-NM-8X or C9500-NM-2Q module.

Ordering Checklist

  • Subscription tier: Add a term-based Network Essentials subscription such as C9500-DNA-L-E-3Y, -5Y or -7Y. Every new order needs a subscription at the same tier as the -E license.
  • Power supplies: C9K-PWR-650WAC-R is the default; C9K-PWR-650WACL-R and C9K-PWR-930WDC-R are the other options. A second supply is preselected; C9500-SPS-NONE removes it. A single C9K-PWR-650WACL-R in a dual-supply setup causes abnormal operation and service interruption.
  • Power cord: Select a power cord for the destination country. The configuration cannot be completed without one.
  • RFID option: Select C9500-RFID to opt in or C9500-RFID-NONE to opt out. The choice is mandatory on this model and cannot be added after delivery.
  • Smart Account: Name the Smart Account on the order. New orders must specify one.

Optional Add-ons

Model

Description

C9K-PWR-650WAC-R

650W AC power supply supported on C9500-24Y4C-E

C9K-PWR-650WACL-R

650W AC power supply supported on C9500-24Y4C-E

C9K-PWR-930WDC-R

930W DC power supply supported on C9500-24Y4C-E

C9K-T1-FANTRAY

Fan tray supported on C9500-24Y4C-E with up to four fans

C9500-ACCKITH-19I=

19-inch rack mount accessory kit for Cisco Catalyst 9500 Series High-End switches

C9500-ACCKITH-23I=

23-inch rack mount accessory kit for Cisco Catalyst 9500 Series High-End switches

C9500-24Y4C-E Switch Front Panel

C9500-24Y4C-E

1

24 1G/10G/25G SFP28 ports

5

USB mini Type B console port

2

Uplink ports

6

RFID (Optional)

3

Ethernet management port

7

Console port (RJ-45 Serial)

4

Reset button

8

USB 3.0 host port

C9500-24Y4C-E Switch Rear Panel

The switch rear panel includes StackWise connectors, StackPower or XPS connectors, ports, fan modules, and power supply modules.

1

Power supply modules

5

PSU 1

2

Grounding pad

6

Fan 1

3

Fan modules

7

Fan 0

4

SATA SSD module

8

PSU 0

Components Delivered in the Shipping Box

The shipping box contains the model of the switch you ordered and other components needed for installation. Some components are optional, depending on your order.

1

Cisco Catalyst 9500 Series switch with optional network module1 (power supply and fan modules not shown)

7

Eight number-8 Phillips flat-head 0.312″ long screws

2

Product documentation and compliance document

8

Two M4.0 x 20mm Phillips pan-head screws (Black color)

3

Two 19-inch mounting brackets

9

Ground lug and two M4.0 x 8mm Phillips pan-head screws

4

Two Cable guides

10

(Optional) AC power cord2

5

Four number-12 pan-head 0.50″ long screws

11

(Optional) RJ-45 console cable1

6

Four number-10 pan-head 0.625″ long screws

12

(Optional) USB console cable1

cisco-catalyst-9500-switch-shipping-box

Specifications

Parameter Specification Parameter Specification
Product ID C9500-24Y4C-E Product type High-performance fixed core and aggregation switch
Network license Network Essentials Port configuration 24 x 1G/10G/25G SFP28 ports and 4 x 40G/100G QSFP uplinks
SFP28 ports 24 ports, all 25G/10G/1G capable Fixed uplink ports 4 x 40G/100G QSFP uplinks
ASIC Cisco UADP 3.0 Switching capacity Up to 2.0 Tbps
Forwarding rate Up to 1 Bpps Power supply slots 2
Power supply options C9K-PWR-650WAC-R, C9K-PWR-650WACL-R, C9K-PWR-930WDC-R Fan modules C9K-T1-FANTRAY, up to 4 fans
Rack units 1 RU Dimensions 1.73 x 17.5 x 18.0 in. (4.4 x 44.5 x 45.7 cm)
Weight 20.99 lbs (9.52 kg) with 2 power supplies and built-in fan AC input voltage 90 to 264 VAC
DC input voltage -40 to -72 VDC with C9K-PWR-930WDC-R Acoustic noise No greater than 71.5 LwAd dB
BTU output 1,454 BTU/hr with C9K-PWR-650WAC-R or C9K-PWR-650WACL-R; 1,484 BTU/hr with C9K-PWR-930WDC-R Minimum software release Cisco IOS XE Fuji 16.8.1a

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Need pricing, stock, or shipping details for the C9500-24Y4C-E ? Layer23-Switch can help you check current availability, lead time, and delivery options for this. Send us the part number, quantity, and destination country via live chat or email [email protected] for a fast quotation.

Quality Certifications

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    Philip Ruiz
    Posted on 28/04/2026
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    5.0

    We followed our standard procedure. No exceptions or workarounds needed.

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    5.0

    I’ve referred Layer23 to at least four peers. Positive feedback from all of them.

    Chen Moore
    Posted on 25/03/2026
    Verified Buyer
    5.0

    Verified the serial number — came back clean. Genuine product.

    Sarah Jenkins
    Posted on 22/08/2024
    Verified Buyer
    5.0

    Very professional handling of our PO. The sales rep was responsive and provided the invoice promptly. Smooth B2B transaction.

    Michael Chen
    Posted on 30/05/2024
    Verified Buyer
    5.0

    Great experience. The logistics team kept us updated on the tracking status throughout the process. Highly recommended for enterprise gear.

Questions & Answers

  • Can two C9500-24Y4C-E switches form a StackWise Virtual pair?

    No. StackWise Virtual needs Network Advantage on both members, and C9500-24Y4C-E carries Network Essentials. The feature was first supported on the Catalyst 9500 in IOS XE 16.9.1, so both members of a pair must be C9500-24Y4C-A.
  • Can the MAC table of C9500-24Y4C-E be resized with a custom SDM template?

    Yes, from IOS XE 17.3.1. A custom template can set the MAC table between 32K and 128K entries inside a shared 416K FIB resource pool, and L3 unicast between 64K and 256K. Netflow entries need 2x the pool space, and the template change requires a reload.
  • How long does C9K-PWR-930WDC-R hold up output in C9500-24Y4C-E?

    C9K-PWR-930WDC-R holds output for at least 8 ms. Input dips longer than that must be covered by the DC feed itself. The supply is hot-swappable and fits either of the two supply slots next to C9K-PWR-650WAC-R.
  • How much packet buffer does C9500-24Y4C-E have?

    C9500-24Y4C-E has a 36 MB unified buffer per ASIC, which serves both ingress and egress queuing. The system also carries 16 GB of DRAM and 16 GB of flash, as listed for the UADP 3.0 high-performance models.
  • Which SSD PIDs can be installed in C9500-24Y4C-E?

    C9500-24Y4C-E accepts the pluggable SATA SSDs C9K-F1-SSD-240G, C9K-F1-SSD-480G and C9K-F1-SSD-960G. The largest option is 960 GB, which Cisco positions for containerized application hosting. Support starts in IOS XE 16.8.1a, and no Network Essentials restriction is listed for the SSD slot.
  • How many PVST instances does C9500-24Y4C-E support?

    C9500-24Y4C-E supports 4,000 PVST instances, the figure listed for the UADP 3.0 high-performance models. The SDM template tables list 1,000 spanning-tree instances, so size VLAN-per-instance designs against the template in use.

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