C9300-24UXB-E – 24x10G mGig UPOE Ports – Higher-Scale Buffer – 560W PoE Budget

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C9300-24UXB-E Description

The C9300-24UXB-E is a Cisco Catalyst 9300 Series higher-scale stackable access switch for campus wiring closets that serve multigigabit endpoints and need deeper address and route tables. The switch has 24 multigigabit UPOE ports, a modular uplink slot, 640 Gbps of switching capacity, a 560W default PoE budget, a 64 MB packet buffer and Network Essentials licensing. As a higher-scale model it stacks only with other higher-scale Catalyst 9300 switches, not with standard C9300 units.

Quick Specs

Parameter

Specification

Product ID

C9300-24UXB-E

Product type

Higher-scale stackable access switch with modular uplinks

Downlink ports

24 x 100M/1G/2.5G/5G/10G multigigabit Cisco UPOE copper ports

Scale profile

Catalyst 9300 higher-scale model

Packet buffer

64 MB for the 24-port Multigigabit higher-scale model

Network license

Network Essentials

Uplink architecture

Modular uplink slot for Cisco Catalyst 9300 network modules

Default power supply

PWR-C1-1100WAC-P

Default PoE budget

560W

Stacking and StackPower

StackWise-480 with StackPower support

Expanded PoE budget

1440W with supported secondary power supply configuration

Minimum software release

Cisco IOS XE Gibraltar 16.12.1 introduced this switch

Switching and forwarding

640 Gbps standalone switching; 476.19 Mpps standalone forwarding

Product Performance

C9300-24UXB-E packet buffer
IPv4 route scale
Default UPOE power budget

Key Features

Multigigabit UPOE Downlinks

All 24 copper ports negotiate 100M, 1G, 2.5G, 5G or 10G and deliver Cisco UPOE, so one port type serves Wi-Fi access points and high-draw endpoints.

64 MB Packet Buffer

The 24-port multigigabit higher-scale model carries a 64 MB buffer, which gives bursty multigigabit traffic more headroom than standard Catalyst 9300 multigigabit models.

Larger Forwarding Tables

The higher-scale group supports 64,000 MAC addresses, 112,000 IPv4 routes, 56,000 IPv6 routes and 18,000 QoS and ACL entries.

Network Essentials Feature Scope

The -E suffix covers Layer 2 and OSPF routed access, while VRF, VXLAN, TrustSec, BGP and MACsec-256 need Network Advantage.

Higher-Scale Stacking Boundary

StackWise-480 supports up to eight members, but higher-scale models stack only with other higher-scale models and not with standard C9300 switches.

Modular Uplink Slot

Uplink media comes from a separate Catalyst 9300 network module, with options from 1G SFP to 25G SFP28 and 40G QSFP, so the access ports do not fix the uplink speed.

Application Scenarios

Large Campus Access Closet

In a wiring closet that serves many Wi-Fi access points and multigigabit desktops, the switch uses its 64,000 MAC address table and 112,000 route capacity to hold a large number of attached clients.

Multigigabit UPOE Floor

A floor of high-draw endpoints such as PTZ cameras and multigigabit access points can run from the 24 UPOE ports, with a second supply added when the 560W default budget runs short.

Higher-Scale Stack Group

A building that already runs higher-scale Catalyst 9300 members can add this switch to the same stack, since higher-scale models stack only with each other.

Product Comparison

Parameter

C9300-24UXB-E

C9300-24UXB-A

C9300-24UX-E

C9300-24UB-E

Downlink ports

24 x 100M/1G/2.5G/5G/10G UPOE

24 x 100M/1G/2.5G/5G/10G UPOE

24 x 100M/1G/2.5G/5G/10G UPOE

24 x 10/100/1000 UPOE

Available PoE power (default)

560W

560W

560W

830W

Network module uplinks

Modular

Modular

Modular

Modular

Network license

Network Essentials

Network Advantage

Network Essentials

Network Essentials

Stack bandwidth

480 Gbps; higher-scale models only

480 Gbps; higher-scale models only

480 Gbps; standard C9300 models only

480 Gbps; higher-scale models only

Switching capacity

640 Gbps

640 Gbps

640 Gbps

208 Gbps

Packet buffer

64 MB

64 MB

32 MB

32 MB

MAC addresses

64,000

64,000

32,000

64,000

IPv4 routes

112,000

112,000

32,000

112,000

C9300-24UXB-E is the Network Essentials version of the higher-scale 24-port Multigigabit UPOE switch also sold as C9300-24UXB-A, and the license tier is the only difference. A design that needs VRF, VXLAN, TrustSec, BGP or MACsec-256 on day one must order C9300-24UXB-A, since the upgrade term C9300-24-E-A-3, -5 or -7 applies only to an installed switch. The 64 MB buffer, 64,000 MAC addresses and 112,000 routes separate it from C9300-24UX-E, which has 32,000 MAC addresses and 32,000 routes, but higher-scale members stack only with other higher-scale models. Gigabit UPOE access with 830W of default PoE moves to C9300-24UB-E.

PoE Power Planning

Planning Item

Cisco Confirmed Value

Order Impact

Default PoE budget

C9300-24UXB-E is listed with 560W available PoE and PWR-C1-1100WAC-P as the default supply

Check whether the powered endpoint count fits the base order before adding a secondary supply

Secondary supply options

The C9300-24UXB-E power table lists 910W with a 350W secondary supply, 1275W with a 715W secondary supply, and 1440W with an 1100W secondary supply

Decide whether the second supply is for redundancy, more PoE budget, or both

UPOE port class

Cisco UPOE ports support Type 1, Type 2, Type 3, and Cisco UPOE powered devices up to 60W per port

Avoid substituting a PoE+, UPOE+, or data-only model unless the endpoint power class changes

StackPower design

Catalyst 9300 modular-uplink switches support StackPower for shared stack power planning

Add StackPower cabling only when the site design uses shared power across stack members

Ordering Checklist

  • Software subscription: Order a 24-port Essentials term: C9300-DNA-E-24-3Y, C9300-DNA-E-24-5Y or C9300-DNA-E-24-7Y. The configurator defaults to Cisco DNA Advantage with a 5-year term, which does not match a Network Essentials switch.
  • Uplink module: Keep the default C9300-NM-8X, pick C9300-NM-4G, C9300-NM-4M, C9300-NM-2Q or C9300-NM-2Y, or select C9300-NM-NONE. The uplink slot takes Catalyst 9300 modules only; C9300X modules do not fit.
  • Second power supply: A second PWR-C1-1100WAC-P is selected by default and C9300-SPS-NONE removes it. A single supply leaves the PoE budget at 560W.
  • Stacking cables: The default 50 cm StackWise cable and 30 cm StackPower cable ship unless C9300-STACK-NONE and C9300-SPWR-NONE remove them. A stack with members in different rows needs longer cables, which the 50 cm default does not cover.
  • Power cords: Select the cord type for the destination country; two cords ship with the switch. The configurator defaults to North America cords.

Optional Add-ons

Model

Description

C9300-NM-4G

Catalyst 9300 4 x 1GE SFP network module

C9300-NM-8X

Catalyst 9300 8 x 10G/1G SFP+ network module

C9300-NM-2Q

Catalyst 9300 2 x 40GE QSFP network module

C9300-NM-2Y

Catalyst 9300 2 x 25G/10G/1G SFP28 network module

C9300-NM-4M

Catalyst 9300 4 x 10G/mGig copper network module

NM-BLANK-T1=

Cisco Catalyst Type 1 network module blank spare

C9300-DNX-E-24-3Y

C9300 Cisco Catalyst Essentials 24-port 3 Year Term license

C9300-DNX-E-24-5Y

C9300 Cisco Catalyst Essentials 24-port 5 Year Term license

C9300-DNX-E-24-7Y

C9300 Cisco Catalyst Essentials 24-port 7 Year Term license

PWR-C1-1100WAC-P=

1100W AC Platinum-rated power supply spare

STACK-T1-50CM=

Data stack 50 cm cable option for C9300 and C9300X SKUs

STACK-T1-1M=

Data stack 1 m cable option for C9300 and C9300X SKUs

STACK-T1-3M=

Data stack 3 m cable option for C9300 and C9300X SKUs

C9300-24UXB-E Switch Rear Panel

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

1

Ground connectors

7

StackPower connectors

2

USB3.0–SSD port

8

AC OK (input) status LED

3

BEACON LED

9

PS OK (output) status LED

4

CONSOLE (RJ-45 console port)

10

StackWise-480 port connectors

5

MGMT (RJ-45 10/100/1000 management port)

11

Power supply modules

6

Fan modules

–

–

Rear Panel of a Cisco Catalyst 9300 Series Switch

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 9300 Series switch with optional network module1 (power supply and fan modules not shown)

9

Eight number-8 Phillips flat-head screws

2

AC power cord

10

Cable guide

3

Product documentation and compliance document

11

M4.0 x 20mm Phillips pan-head screw

4

Four rubber mounting feet

12

(Optional) RJ-45 console cable

5

Ground lug screw and ring terminal

13

(Optional) USB console cable

6

Two 19-inch mounting brackets

14

(Optional) StackWise-480/1T cable (0.5-meter, 1-meter, or 3-meter)

7

Four number-12 pan-head screws

15

(Optional) StackPower cable (0.3-meter or 1.5-meter)

8

Four number-10 pan-head screws

16

(Optional) StackWise-320 cable

cisco-catalyst-9300-switch-shipping-box

Specifications

Parameter Specification Parameter Specification
Product ID C9300-24UXB-E Product type Higher-scale stackable access switch with modular uplinks
Network license Network Essentials Downlink ports 24 x 100M/1G/2.5G/5G/10G multigigabit Cisco UPOE copper ports
Scale profile Catalyst 9300 higher-scale model Default power supply PWR-C1-1100WAC-P
Default PoE budget 560W PoE with 350W secondary supply 910W
PoE with 715W secondary supply 1275W PoE with 1100W secondary supply 1440W maximum by port rating
Uplink architecture Optional field-replaceable C9300 network module Supported network modules C9300-NM-4G, C9300-NM-8X, C9300-NM-2Q, C9300-NM-2Y, C9300-NM-4M
Stacking architecture StackWise-480 Stack members Higher-scale C9300 models only
Stack bandwidth 480 Gbps StackPower Supported
Software introduction Cisco IOS XE Gibraltar 16.12.1 introduced C9300-24UXB-E Packet buffer 64 MB
Flexible NetFlow entries 256,000 flows for higher-scale 24-port Multigigabit models MAC addresses 64,000
IPv4 routes 112,000 total routes IPv6 routes 56,000
Multicast routes 16,000 QoS entries 18,000
ACL entries 18,000 DRAM 8 GB
Flash 16 GB VLAN IDs 4094
Jumbo frames 9198 bytes Switching capacity 640 Gbps standalone
Switching capacity with stacking 1,120 Gbps Forwarding rate 476.19 Mpps standalone
Forwarding rate with stacking 833.33 Mpps Dimensions 1.73 x 17.5 x 20.2 in. (4.4 x 44.5 x 51.3 cm)
Power supply input PWR-C1-1100WAC-P supports 115 to 240 VAC autoranging UPOE support Type 1, Type 2, Type 3, and Cisco UPOE powered devices up to 60W per port

Quality Certifications

Customer Reviews

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    Daniel Wilson
    Posted on 24/03/2026
    Verified Buyer
    5.0

    I needed confirmation that the product was current. They had the answer immediately.

    Joseph Wright
    Posted on 20/03/2026
    Verified Buyer
    5.0

    Exactly what we needed. No complaints.

    Raymond Ortiz
    Posted on 29/01/2026
    Verified Buyer
    5.0

    Excellent customer service mentality — applies before, during, and after the sale.

    Legolas
    Posted on 25/07/2025
    Verified Buyer
    5.0

    Your shipping speed is unmatched.

    Aria Paxton
    Posted on 28/03/2025
    Verified Buyer
    5.0

    UPOE+ drives access points and video bars without injectors.

Questions & Answers

  • Can C9300-24UXB-E be stacked?

    Yes, but only with other higher-scale Catalyst 9300 models. C9300-24UXB-E stacks up to eight members over StackWise-480, and standard C9300 switches cannot join the stack. StackPower is supported across the stacked members.
  • What does Network Essentials on C9300-24UXB-E include?

    Network Essentials on C9300-24UXB-E covers Layer 2 and OSPF routed access. VRF, VXLAN, TrustSec, BGP and MACsec-256 are not part of this tier. The -E suffix carries this tier on the switch.
  • Can the secondary supply in C9300-24UXB-E be the 1900W model?

    Yes. PWR-C1-1900WAC-P is orderable on modular-uplink Catalyst 9300 switches and mixes with the other supplies, including the default PWR-C1-1100WAC-P. It delivers 1500W when fed at 115V and 1900W when fed at 230V, and it needs its own power cord, so check the cord type on the quote.
  • Is ThousandEyes bundled with an Essentials subscription for C9300-24UXB-E?

    No. TE-EMBEDDED-T, the ThousandEyes Network and Application Synthetics license, ships by default only with 3, 5 or 7-year Cisco Catalyst or Cisco DNA Advantage subscriptions. A Network Essentials subscription for C9300-24UXB-E does not include it, so an Advantage tier is needed to get it.
  • How long do PoE endpoints on C9300-24UXB-E stay dark after a reboot?

    Under 30 seconds when Fast PoE is set. Perpetual PoE covers an upgrade reload, a crash and a manual reboot, in a stack as well. Fast PoE restores endpoint power in under 30 seconds from stored power and needs perpetual-poe-ha on the port. Power loss and hibernation are not covered.
  • How many shared-power members can a StackPower ring hold when C9300-24UXB-E is one of them?

    A StackPower ring supports up to four members sharing power. Adding the XPS 2200 expandable power system lets up to eight members share power. The ring cables are CAB-SPWR-30CM and CAB-SPWR-150CM. Fixed-uplink C9300L and C9300LM switches have no StackPower, so a C9300-24UXB-E stack stays on modular-uplink members.
  • Which license tier must the other stack members of C9300-24UXB-E run?

    They must run the same license tier, Network Essentials, and the same IOS XE release as C9300-24UXB-E. Mixing an Advantage member into the stack is not allowed. All members use SSO and NSF, and only higher-scale models can be added, up to eight switches in one stack.
  • What QoS and ACL entry counts does C9300-24UXB-E support?

    C9300-24UXB-E belongs to the higher-scale group, so it holds 18,000 security ACL entries and 18,000 QoS entries. Standard Catalyst 9300 switches hold 5,120 of each. These counts do not change between Network Essentials and Network Advantage, and NetFlow reaches 256,000 on this 24-port mGig model.

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DataSheet Downloads

  • C9300-24UXB-E Datasheet

  • Cisco Catalyst 9300 Switch Datasheet