C9500-48Y4C-A-BUN – 2x48x25G SFP28 Switches – 8x100G SR-BiDi Optics

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C9500-48Y4C-A-BUN Description

The C9500-48Y4C-A-BUN is a Cisco Catalyst 9500 Series High Performance switch bundle for campus aggregation pairs that run 25G fiber downlinks. The bundle has two switches with 48 1G/10G/25G SFP28 ports and four 40G/100G QSFP28 uplinks each, plus eight QSFP-40/100-SRBD optics, and every switch offers 3.2 Tbps of switching capacity. Both switches carry Network Advantage, which adds StackWise Virtual, BGP, VXLAN and MACsec-256.

Quick Specs

Parameter

Specification

Product ID

C9500-48Y4C-A-BUN

Product type

High-performance switch and optics bundle

Switch quantity

2 x Cisco Catalyst 9500 High Performance 48-port 25G switches

Network license

Network Advantage

Per-switch downlink ports

48 x 1G/10G/25G SFP28

Per-switch fixed uplink ports

4 x 40G/100G QSFP28

Bundle downlink ports

96 x 1G/10G/25G SFP28

Bundle fixed uplink ports

8 x 40G/100G QSFP28

Switching capacity

Up to 3.2 Tbps per switch

Forwarding rate

Up to 1 Bpps per switch

Power supply slots

2 per switch

Fan modules

C9K-T1-FANTRAY high-performance fan tray

Minimum software release

Cisco IOS XE Fuji 16.8.1a

Product Performance

Matched Catalyst 9500 Hardware Pair
Included 40G/100G SR-BiDi Optics
Per-Switch Switching Capacity

Key Features

Two Switches In One Bundle

The bundle holds two complete Catalyst 9500 High Performance switches, which together provide 96 SFP28 downlinks and eight QSFP28 uplinks.

Eight SR-BiDi Optics Included

Eight QSFP-40/100-SRBD modules match the eight uplink ports across the pair. They run 40G or 100G over duplex multimode fiber with LC connectors.

1G, 10G And 25G SFP28 Downlinks

Each switch offers 48 SFP28 ports that accept 1G, 10G or 25G optics and cables, so mixed-speed fiber access blocks connect without media converters.

Fixed QSFP28 Uplinks

Each switch has four built-in 40G/100G QSFP28 uplinks and no network module bay, so uplink capacity per chassis stays at four ports.

Network Advantage On Both Switches

The license tier adds StackWise Virtual, BGP, VXLAN with BGP-EVPN, MPLS and MACsec-256, and the subscription follows the Cisco DNA Advantage path.

Redundant Power And Fan Tray

Every switch has two power supply slots for 650W AC, 650W AC low-voltage or 930W DC supplies, and a fan tray with up to four hot-swappable fans.

Application Scenarios

Matched Aggregation Pair

A campus distribution block can place the two switches side by side, each terminating 25G fiber links from access closets and sending the combined traffic to the core over its own QSFP28 uplinks.

Logical Core With StackWise Virtual

The two switches in the bundle can join as one logical core node under StackWise Virtual, giving downstream devices a multichassis EtherChannel across both chassis.

Multimode 40G/100G Uplinks

In a building where multimode LC fiber is already installed, the eight SR-BiDi optics light the four uplink ports on each switch over duplex multimode cabling.

Product Comparison

Parameter

C9500-48Y4C-A-BUN

C9500-48Y4C-A

C9500-48Y4C-E

Switches included

2

1

1

Downlink ports

96 x 1G/10G/25G SFP28

48 x 1G/10G/25G SFP28

48 x 1G/10G/25G SFP28

Fixed uplink ports

8 x 40G/100G QSFP28

4 x 40G/100G QSFP28

4 x 40G/100G QSFP28

Included optics

8 x QSFP-40/100-SRBD

0

0

Switching capacity

Up to 3.2 Tbps per switch

Up to 3.2 Tbps

Up to 3.2 Tbps

Forwarding rate

Up to 1 Bpps per switch

Up to 1 Bpps

Up to 1 Bpps

MAC addresses

Up to 82,000 entries per switch

Up to 82,000 entries

Up to 82,000 entries

Network license

Network Advantage

Network Advantage

Network Essentials

C9500-48Y4C-A-BUN and C9500-48Y4C-A use the same 48-port SFP28 switch, but the bundle is two switches with eight QSFP-40/100-SRBD optics, giving 96 SFP28 downlinks and 8 QSFP28 uplinks, while C9500-48Y4C-A is one switch with no optics. A site that needs a single chassis, or that sources its optics separately, should order C9500-48Y4C-A. Both carry Network Advantage; when the design needs only Layer 2, routed access with OSPF up to 1,000 routes, and MACsec-128, C9500-48Y4C-E provides Network Essentials on a single switch but gives up StackWise Virtual, BGP, VXLAN, and MACsec-256.

Ordering Checklist

  • Subscription tier: Add a term-based Catalyst Software Subscription or Cisco DNA subscription at the Network Advantage tier. Every new order needs a subscription at the same tier as the network license.
  • Second power supply: The configurator preselects a second supply; C9500-SPS-NONE removes it, and a redundant supply is ordered as C9K-PWR-650WAC-R/2. Check this line, or the switch ends up with one supply by mistake or an unneeded second one.
  • Low-voltage supply: Fill both slots when C9K-PWR-650WACL-R is chosen. One C9K-PWR-650WACL-R in a dual-supply configuration causes faults and service interruption.
  • Power cords: Select a power cord for each supply, because the configuration cannot be completed without a cord selection.
  • RFID option: Choose either C9500-RFID or C9500-RFID-NONE. The choice is mandatory at order time and cannot be added after the switch ships.

Optional Add-ons

Model

Description

C9K-PWR-650WAC-R/2

Redundant 650W AC power supply for the second power supply slot

C9500-ACCKITH-19I=

Catalyst 9500 Series High-End 19-inch rack mount accessory kit shared by C9500-32C-A, C9500-32QC-A, C9500-24Y4C-A, and C9500-48Y4C-A

Specifications

Parameter Specification Parameter Specification
Specification C9500-48Y4C-A-BUN Series Cisco Catalyst 9500 Series
Product type High-performance switch and optics bundle Switch quantity 2 x Cisco Catalyst 9500 High Performance 48-port 25G switches
Base PID C9500-48Y4C-A-BUN Included optics 8 x QSFP-40/100-SRBD
Network license Network Advantage Per-switch downlink ports 48 x 1G/10G/25G SFP28
Per-switch fixed uplink ports 4 x 40G/100G QSFP28 Bundle downlink ports 96 x 1G/10G/25G SFP28
Bundle fixed uplink ports 8 x 40G/100G QSFP28 ASIC Cisco UADP 3.0
Switching capacity Up to 3.2 Tbps per switch Forwarding rate Up to 1 Bpps per switch
DRAM 16 GB Flash 16 GB
Power supply slots 2 per switch Default power supply C9K-PWR-650WAC-R 650W AC per switch
Power supply options C9K-PWR-650WAC-R, C9K-PWR-650WACL-R, and C9K-PWR-930WDC-R Fan modules C9K-T1-FANTRAY high-performance fan tray
Rack units 1 RU per switch Dimensions 1.73 x 17.5 x 18.0 in. (4.4 x 44.5 x 45.7 cm)
Weight 21.96 lbs (9.96 kg) per switch with 2 power supplies and built-in fan Acoustic noise No greater than 71.5 LwAd dB
AC input voltage 90 to 264 VAC Included optic connector LC
Included optic fiber type Multimode fiber Included optic reach 100G: 70m on OM3 or 100m on OM4; 40G: 100m on OM3 or 150m on OM4
Minimum software release Cisco IOS XE Fuji 16.8.1a

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Quality Certifications

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    Ashley Cook
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    Received with original packaging and all accessories. Nothing missing.

    Roger Yamamoto
    Posted on 31/03/2026
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    Just placed another reorder without hesitation.

    Kathryn Müller
    Posted on 06/03/2026
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    5.0

    Our team had reservations. They were unfounded — Layer23 delivers.

Questions & Answers

  • What does C9500-48Y4C-A-BUN include?

    C9500-48Y4C-A-BUN includes 2 x C9500-48Y4C switches, Network Advantage licensing, and 8 QSFP-40/100-SRBD optics. It is a matched high-performance switch and optics bundle rather than a single chassis.
  • How many downlink and uplink ports are in C9500-48Y4C-A-BUN?

    C9500-48Y4C-A-BUN provides 96 x 1G/10G/25G SFP28 downlink ports and 8 x 40G/100G QSFP28 fixed uplink ports across both switches. Each chassis contributes 48 downlinks and 4 uplinks.
  • Does C9500-48Y4C-A-BUN use Network Advantage?

    Yes, C9500-48Y4C-A-BUN uses Network Advantage for its two-switch configuration. A single switch with Network Essentials instead follows the C9500-48Y4C-E order path.
  • What throughput does each C9500-48Y4C-A-BUN switch provide?

    Each switch in C9500-48Y4C-A-BUN supports up to 3.2 Tbps switching capacity and up to 1 Bpps forwarding. The bundle uses two Cisco UADP 3.0 switch platforms.
  • How does C9500-48Y4C-A-BUN differ from C9500-48Y4C-A?

    C9500-48Y4C-A-BUN contains two switches and 8 QSFP-40/100-SRBD modules, while C9500-48Y4C-A is a single Network Advantage switch without those optics. The per-switch port profile is the same.
  • Why would a buyer choose C9500-48Y4C-E over C9500-48Y4C-A-BUN?

    C9500-48Y4C-E is preferable to C9500-48Y4C-A-BUN when one Network Essentials switch is required instead of two Network Advantage switches with bundled optics. The approved switch quantity, optics scope, and license tier decide between them.
  • Which power, cooling, and software components support C9500-48Y4C-A-BUN?

    C9500-48Y4C-A-BUN uses 2 power supply slots per switch, C9K-T1-FANTRAY cooling, and Cisco IOS XE Fuji 16.8.1a as the minimum software release. The default supply is C9K-PWR-650WAC-R 650W AC.
  • When is C9500-48Y4C-A-BUN the wrong order?

    C9500-48Y4C-A-BUN is wrong when only one switch is needed, the included SR-BiDi optics do not match the fiber plant, or Network Essentials is approved. A single-switch PID keeps those decisions separate.

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