Can C9300-24UB-A be stacked?

Yes, but only with other higher-scale Catalyst 9300 models. C9300-24UB-A stacks up to 8 switches at 480 Gbps over StackWise-480 at one license level, and a standard Catalyst 9300 cannot join the stack. StackPower is supported.

What does Network Advantage on C9300-24UB-A include?

Network Advantage on C9300-24UB-A includes BGP, VXLAN, LISP, MPLS and MACsec-256, plus Layer 2 and routed access. The higher-scale tables of 112,000 IPv4 routes and 64,000 MAC addresses give these functions room to scale.

How many switches can share power in one StackPower ring with C9300-24UB-A?

A StackPower ring joins up to four switches with 1+N redundancy. With the XPS 2200 expandable power system, up to eight switches share power in a star topology. One eight-member data stack can also hold two power stacks. Order the ring cables as CAB-SPWR-30CM or CAB-SPWR-150CM, because StackPower works only on modular-uplink Catalyst 9300 models.

Can C9300-24UB-A use PWR-C1-1900WAC-P as its second power supply?

Yes. PWR-C1-1900WAC-P is listed as an orderable supply for modular-uplink Catalyst 9300 models and mixes with the other 9300 supplies. It outputs 1500W at 115V input and 1900W at 230V input, and it uses its own power cord. Each switch takes two supplies in N+1 redundancy.

Do PoE devices on C9300-24UB-A stay powered during a software reload?

Yes for soft reloads. Perpetual PoE keeps device power through an upgrade, a crash or a manual reboot, and it works across a stack. It does not cover power loss, front-end processor removal or hibernation. Fast PoE restores device power in under 30 seconds from stored power and needs perpetual-poe-ha configured on the port.

What multicast, SGT and NetFlow table limits does C9300-24UB-A support?

C9300-24UB-A runs the UADP 2.0 XL ASIC, so its tables are sized above a standard Catalyst 9300. The datasheet lists multicast 16,000, SGT 8,000 and NetFlow 128,000. It also lists host routes 48,000 and longest-prefix-match entries 64,000. Plan SGT and multicast policy for large closets against those ceilings.

Does a Network Advantage subscription for C9300-24UB-A include ThousandEyes?

Yes. The ThousandEyes Network and Application Synthetics license, PID TE-EMBEDDED-T, is included by default with 3, 5 or 7-year Cisco Catalyst or Cisco DNA Advantage subscriptions on Catalyst 9300 switches, for the same term as the subscription. It is not included with Essentials subscriptions.

Which USB SSD options can C9300-24UB-A use for external storage?

C9300-24UB-A takes an external USB 3.0 SSD, orderable as SSD-120G (120 GB) or SSD-240G (240 GB). The two drives are orderable across the Catalyst 9300 family and are not split by model. Fixed-uplink C9300L and C9300LM switches follow different stacking rules, but the storage options on C9300-24UB-A stay the same.

What must match across a StackWise-480 stack that includes C9300-24UB-A?

All members of the stack run SSO and NSF, and they need the same IOS XE release and the same license tier. A Network Advantage member such as C9300-24UB-A cannot join an Essentials stack. Only higher-scale members can be added, and a stack holds up to eight switches.

C9300-24UB-A – 24x1G UPOE Ports – Higher-Scale Buffer – 830W PoE Budget

Name: C9300-24UB-A - Cisco Higher-Scale 24-Port UPOE Advantage Switch
Brand: Cisco
SKU: C9300-24UB-A
Price: 4692.76 USD
Availability: InStock
Rating: 4.92 (13 reviews)

Brand: Cisco Category: Catalyst 9300 Switches Model: C9300-24UB-A

Rated 4.92 out of 5 based on 13 customer ratings

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C9300-24UB-A Description

The C9300-24UB-A is a Cisco Catalyst 9300 Series higher-scale stackable access switch for closets that aggregate large routing and policy tables alongside 24 Gigabit UPOE ports. The switch has 24 10/100/1000 Cisco UPOE ports, an 830W PoE budget on the default 1100W supply, a modular uplink slot, a 32 MB packet buffer and 112,000 IPv4 routes. It stacks only with other higher-scale models, and the -A suffix carries Network Advantage.

Quick Specs

Parameter	Specification
Product ID	C9300-24UB-A
Product type	Higher-scale stackable access switch with modular uplinks
Downlink ports	24 x 10/100/1000 UPOE copper ports
Higher-scale profile	32-MB packet buffer for higher-scale Gigabit Ethernet models
Uplink architecture	Modular uplink slot; C9300-NM-8X is the default C9300 order selection unless changed
Network license	Network Advantage
Default power supply	PWR-C1-1100WAC-P
Default PoE budget	830W
Minimum software release	Cisco IOS XE Gibraltar 16.12.1
Stacking and StackPower	StackWise-480 with StackPower support
Expanded PoE budget	1440W with supported secondary power supply configuration
Switching and forwarding	208 Gbps standalone switching; 154.76 Mpps standalone forwarding

Product Performance

Higher-Scale Packet Buffer

MAC Addresses

Standalone Switching Capacity

Key Features

Higher-Scale Table Sizes

The higher-scale group holds 64,000 MAC addresses, 112,000 IPv4 routes, 56,000 IPv6 routing entries and 18,000 QoS and ACL entries. A standard Catalyst 9300 holds 32,000 MAC addresses and 32,000 IPv4 routes.

32 MB Packet Buffer

The buffer is double the 16 MB of the standard 24-port Gigabit models, which helps when many downlinks burst toward the uplink at once.

Stacking Within The Higher-Scale Group

Stacks of up to eight switches run at 480 Gbps, but only with other higher-scale members and at one license level. A standard Catalyst 9300 cannot join the stack.

UPOE Budget Across 24 Ports

Each port can deliver up to 60W, and the default 1100W supply leaves 830W for PoE, about 34W per port if all 24 draw power at once. A second 1100W supply lifts the budget to 1440W, which covers a full 60W on every port.

Modular Uplink Slot

Uplinks come from a Catalyst 9300 network module such as the 8 x 10G/1G SFP+ C9300-NM-8X or the 2 x 40G C9300-NM-2Q, and the default configuration ships without one. Changing uplink speed later means swapping the module rather than the switch.

Network Advantage On Higher-Scale Hardware

Network Advantage adds BGP, VXLAN, LISP, MPLS and MACsec-256, and the larger route tables give those functions room to scale.

Application Scenarios

Aggregation Closet With UPOE Access

A building aggregation closet can power UPOE endpoints on its 24 copper ports and still hold the larger MAC and route tables that a closet collecting downstream switches builds up.

Large Routed Campus Edge

In a routed campus edge, the switch runs Network Advantage routing and segmentation against 112,000 IPv4 routes and 18,000 ACL entries rather than the 32,000 and 5,120 of a standard Catalyst 9300.

Higher-Scale Stack Of Closets

Several higher-scale switches can form one StackWise-480 stack in a large closet, with every member drawn from the higher-scale group.

Product Comparison

Parameter	C9300-24UB-A	C9300-24UB-E	C9300-24U-A	C9300-24UXB-A
Total 10/100/1000, Multigigabit copper or SFP fiber	24 x 10/100/1000 UPOE	24 x 10/100/1000 UPOE	24 x 10/100/1000 UPOE	24 x 10G/mGig UPOE
Uplink configuration	Modular uplinks	Modular uplinks	Modular uplinks	Modular uplinks
Network license	Network Advantage	Network Essentials	Network Advantage	Network Advantage
Available PoE power with default power supply	830W	830W	830W	560W
Maximum PoE power with 1100W secondary PS	1440W	1440W	1440W	1440W
Packet buffer per SKU	32 MB	32 MB	16 MB	64 MB
MAC addresses	64,000	64,000	32,000	64,000
Total number of IPv4 routes (ARP plus learned routes)	112,000	112,000	32,000	112,000
Switching capacity	208 Gbps	208 Gbps	208 Gbps	640 Gbps

C9300-24UB-A and C9300-24U-A both give 24 1G UPOE ports and an 830W default budget, but C9300-24UB-A is the higher-scale model with a 32 MB buffer, 64,000 MAC addresses and 112,000 IPv4 routes against 16 MB, 32,000 and 32,000, and it stacks only with other higher-scale models. Sites that need 10G/mGig UPOE access move to C9300-24UXB-A, which has 24 multigigabit ports, a 64 MB buffer and 640 Gbps standalone switching, but a lower 560W default PoE budget. C9300-24UB-E is the same hardware on Network Essentials for a closet that can drop Network Advantage; the way back up is an upgrade through C9300-LIC=, which cannot be bought with the switch.

PoE Power Planning

Planning Item	Cisco Confirmed Value	Order Impact
Default PoE budget	C9300-24UB-A is listed with 830W available PoE and PWR-C1-1100WAC-P as the default supply	Size the powered endpoint plan to the 830W default budget unless the power design adds a second supply
Secondary supply selection	Cisco ordering selects a secondary power supply by default unless the no-secondary-supply option is chosen	Decide whether the quote should keep redundant power or remove the secondary supply from the configuration
UPOE access profile	C9300-24UB-A is a 24-port 10/100/1000 UPOE model	Prevent replacement with data-only, PoE+, UPOE+, or mGig order lines unless the access-port requirement changes
StackPower	C9300-24UB-A supports StackPower	Add StackPower cables only when the site design requires shared power across compatible Catalyst 9300 stack members

Ordering Checklist

Subscription: Select C9300-DNA-A-24-3Y, -5Y or -7Y, the 24-port Cisco DNA Advantage term. New orders need a subscription of the same tier as the network license, and the configurator defaults to Advantage with a 5-year term.
Uplink module: Keep the default C9300-NM-8X, choose another C9300-NM module, or select C9300-NM-NONE. The uplink slot ships with C9300-NM-8X unless changed.
Second power supply: A second PWR-C1-1100WAC-P is added by default; C9300-SPS-NONE removes it. Without it the PoE budget stays at the single-supply 830W.
Stack and StackPower cables: A 50 cm StackWise cable and a 30 cm StackPower cable are added by default; C9300-STACK-NONE and C9300-SPWR-NONE remove them. A stack needs a StackWise cable of the right length, so a stand-alone switch can drop both.
Power cords: Select the cord type for the destination country. Two cords ship, and the configurator defaults to North American cords.

Optional Add-ons

Model	Description
C9300-NM-4G	Catalyst 9300 Series 4 x 1G network module
C9300-NM-8X	Catalyst 9300 Series 8 x 10G/1G network module
C9300-NM-2Q	Catalyst 9300 Series 2 x 40G network module
C9300-NM-2Y	Catalyst 9300 Series 2 x 25G/10G/1G network module
C9300-NM-4M	Catalyst 9300 Series 4 x 10G/mGig copper network module
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

C9300-24UB-A 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

Specifications

Parameter	Specification	Parameter	Specification
Product ID	C9300-24UB-A	Product type	Higher-scale stackable access switch with modular uplinks
Network license	Network Advantage	Minimum software release	Cisco IOS XE Gibraltar 16.12.1
Downlink ports	24 x 10/100/1000 UPOE copper ports	Network module slot	Modular C9300 network module slot
Supported network modules	C9300-NM-4G, C9300-NM-8X, C9300-NM-2Q, C9300-NM-2Y, C9300-NM-4M	Switching capacity	208 Gbps
Forwarding rate	154.76 Mpps	Switching capacity with stacking	688 Gbps
Forwarding rate with stacking	511.90 Mpps	Packet buffer	32 MB
DRAM	8 GB	Flash	16 GB
MAC addresses	64,000	VLAN IDs	4,094
IPv4 routes	112,000 total routes	IPv6 routes	56,000
Multicast routes	16,000	ACL entries	18,000
QoS entries	18,000	Flexible NetFlow entries	128,000 flows for higher-scale Gigabit Ethernet models
Jumbo frames	9,198 bytes	Stacking	StackWise-480
Stack bandwidth	480 Gbps	Stack mixing	Higher-scale C9300 models only
StackPower	Supported	Default power supply	PWR-C1-1100WAC-P
Default PoE budget	830W	Fan modules	3 field-replaceable fans

Quality Certifications

Customer Reviews

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Posted on 11/04/2026

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Secure packaging. Nothing was damaged. Trustworthy.

Questions & Answers

Can C9300-24UB-A be stacked?
Yes, but only with other higher-scale Catalyst 9300 models. C9300-24UB-A stacks up to 8 switches at 480 Gbps over StackWise-480 at one license level, and a standard Catalyst 9300 cannot join the stack. StackPower is supported.
What does Network Advantage on C9300-24UB-A include?
Network Advantage on C9300-24UB-A includes BGP, VXLAN, LISP, MPLS and MACsec-256, plus Layer 2 and routed access. The higher-scale tables of 112,000 IPv4 routes and 64,000 MAC addresses give these functions room to scale.
How many switches can share power in one StackPower ring with C9300-24UB-A?
A StackPower ring joins up to four switches with 1+N redundancy. With the XPS 2200 expandable power system, up to eight switches share power in a star topology. One eight-member data stack can also hold two power stacks. Order the ring cables as CAB-SPWR-30CM or CAB-SPWR-150CM, because StackPower works only on modular-uplink Catalyst 9300 models.
Can C9300-24UB-A use PWR-C1-1900WAC-P as its second power supply?
Yes. PWR-C1-1900WAC-P is listed as an orderable supply for modular-uplink Catalyst 9300 models and mixes with the other 9300 supplies. It outputs 1500W at 115V input and 1900W at 230V input, and it uses its own power cord. Each switch takes two supplies in N+1 redundancy.
Do PoE devices on C9300-24UB-A stay powered during a software reload?
Yes for soft reloads. Perpetual PoE keeps device power through an upgrade, a crash or a manual reboot, and it works across a stack. It does not cover power loss, front-end processor removal or hibernation. Fast PoE restores device power in under 30 seconds from stored power and needs perpetual-poe-ha configured on the port.
What multicast, SGT and NetFlow table limits does C9300-24UB-A support?
C9300-24UB-A runs the UADP 2.0 XL ASIC, so its tables are sized above a standard Catalyst 9300. The datasheet lists multicast 16,000, SGT 8,000 and NetFlow 128,000. It also lists host routes 48,000 and longest-prefix-match entries 64,000. Plan SGT and multicast policy for large closets against those ceilings.
Does a Network Advantage subscription for C9300-24UB-A include ThousandEyes?
Yes. The ThousandEyes Network and Application Synthetics license, PID TE-EMBEDDED-T, is included by default with 3, 5 or 7-year Cisco Catalyst or Cisco DNA Advantage subscriptions on Catalyst 9300 switches, for the same term as the subscription. It is not included with Essentials subscriptions.
Which USB SSD options can C9300-24UB-A use for external storage?
C9300-24UB-A takes an external USB 3.0 SSD, orderable as SSD-120G (120 GB) or SSD-240G (240 GB). The two drives are orderable across the Catalyst 9300 family and are not split by model. Fixed-uplink C9300L and C9300LM switches follow different stacking rules, but the storage options on C9300-24UB-A stay the same.
What must match across a StackWise-480 stack that includes C9300-24UB-A?
All members of the stack run SSO and NSF, and they need the same IOS XE release and the same license tier. A Network Advantage member such as C9300-24UB-A cannot join an Essentials stack. Only higher-scale members can be added, and a stack holds up to eight switches.

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C9300-24UB-A – 24x1G UPOE Ports – Higher-Scale Buffer – 830W PoE Budget

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C9300-24UB-A Description

Quick Specs

Product Performance

Key Features

Application Scenarios

Product Comparison

PoE Power Planning

Ordering Checklist

Optional Add-ons

C9300-24UB-A Switch Rear Panel

Components Delivered in the Shipping Box

Specifications

Quality Certifications

Customer Reviews

Questions & Answers

Can C9300-24UB-A be stacked?

What does Network Advantage on C9300-24UB-A include?

How many switches can share power in one StackPower ring with C9300-24UB-A?

Can C9300-24UB-A use PWR-C1-1900WAC-P as its second power supply?

Do PoE devices on C9300-24UB-A stay powered during a software reload?

What multicast, SGT and NetFlow table limits does C9300-24UB-A support?

Does a Network Advantage subscription for C9300-24UB-A include ThousandEyes?

Which USB SSD options can C9300-24UB-A use for external storage?

What must match across a StackWise-480 stack that includes C9300-24UB-A?

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