C9350-24Y – 24x25G SFP28 Ports – Modular Uplink – Fiber Aggregation Switch
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C9350-24Y Description
The C9350-24Y is a Cisco C9350 Series Smart Switch for campus distribution and server aggregation over 25G fiber. The switch has 24 SFP28 ports that run at 1G, 10G or 25G, a modular uplink slot for up to 400G and 2,000 Gbps of switching capacity across two Silicon One A100/L ASICs. Power over Ethernet is not available on any port, and the minimum software for the switch is Cisco IOS XE 26.2.1.
Quick Specs
|
Parameter |
Specification |
|---|---|
|
Product ID |
C9350-24Y |
|
Downlink ports |
24 x 1G/10G/25G SFP28 |
|
Network module slot |
1 modular uplink slot, up to 400G |
|
Supported network modules |
C9350-NM-2C, C9350-NM-4C, C9350-NM-8Y, C9350-NM-8L, C9350-NM-8M |
|
Switching capacity |
2,000 Gbps |
|
Forwarding rate |
1,488 Mpps |
|
ASIC |
2 x Cisco Silicon One A100/L |
|
Default power supply |
PWR-C2-500WAC-I 500W AC |
|
Power supply slots |
3 |
|
Stacking |
StackWise-1.6T, 1.6 Tbps, up to 8 members |
|
Network license |
Essentials or Advantage, Access Tier 1 Medium subscription |
|
Minimum software release |
Cisco IOS XE 26.2.1 |
Product Performance
Key Features
The 24 downlinks are multirate SFP28 ports. A server on 25G, a distribution link still on 10G and an older device at 1G can sit side by side on the same switch, each on the optic that matches its speed.
The uplink slot carries up to 400 Gbps toward the core. C9350-NM-4C adds four 100G/40G QSFP28 ports and C9350-NM-8L eight 50G SFP56 ports, each at up to 400 Gbps. C9350-NM-2C, C9350-NM-8Y and C9350-NM-8M cover 200G and smaller uplinks.
Two Silicon One A100/L ASICs give the switch 2,000 Gbps of switching and 1,488 Mpps of forwarding. That covers all 24 ports at 25G plus a full 400G uplink, counted in both directions. Each ASIC brings 18 MB of packet buffer, 36 MB in total.
With all 24 ports at 25G, the switch takes in 600G of downlink traffic. That load runs 1.5:1 over a 400G module such as C9350-NM-4C and 3:1 over a 200G module such as C9350-NM-2C.
StackWise-1.6T joins up to eight C9350 switches at 1.6 Tbps and lifts this switch to 3,600 Gbps of switching capacity inside a stack. Copper and fiber C9350 models can share the stack at one license level, so a 25G aggregation switch and Multigigabit access switches run as one system.
The default 500W supply sits in the first of three hot-swappable bays. With no PoE to carry, a second supply is there for N+1 redundancy rather than extra budget, and supplies of different ratings can share the chassis.
Application Scenarios
In a server room, application and storage servers connect over 10G or 25G SFP28 links, and the switch carries their traffic to the core through 100G uplinks on the network module.
A campus distribution block collects fiber uplinks from access closets on the SFP28 ports and hands them to the core over the 400G uplink slot.
At a regional site that runs AI inference near its users, inference servers and high-throughput storage arrays attach at 25G and share the switch’s 2,000 Gbps of switching capacity.
Product Comparison
|
Parameter |
C9350-24Y |
C9350-12Y |
C9350-24S |
C9350-48S |
|---|---|---|---|---|
|
Downlink ports |
24 x 1G/10G/25G SFP28 |
12 x 1G/10G/25G SFP28 |
24 x 1G SFP |
48 x 1G SFP |
|
ASIC |
2 x Silicon One A100/L |
1 x Silicon One A100/L |
1 x Silicon One A100/L |
1 x Silicon One A100/L |
|
PoE type |
No PoE |
No PoE |
No PoE |
No PoE |
|
Network module slot |
Up to 400G |
Up to 200G |
Up to 200G |
Up to 200G |
|
Supported network modules |
C9350-NM-2C, C9350-NM-4C, C9350-NM-8Y, C9350-NM-8L, C9350-NM-8M |
C9350-NM-2C, C9350-NM-8Y, C9350-NM-8M |
C9350-NM-2C, C9350-NM-8Y, C9350-NM-8M |
C9350-NM-2C, C9350-NM-8Y, C9350-NM-8M |
|
Network license |
Essentials or Advantage, Medium (up to 24 ports) |
Essentials or Advantage, Medium (up to 24 ports) |
Essentials or Advantage, Medium (up to 24 ports) |
Essentials or Advantage, Large (48 ports) |
|
Stacking |
StackWise-1.6T, 1.6 Tbps |
StackWise-1.6T, 1.6 Tbps |
StackWise-1.6T, 1.6 Tbps |
StackWise-1.6T, 1.6 Tbps |
|
Switching capacity |
2,000 Gbps |
1,000 Gbps |
448 Gbps |
496 Gbps |
C9350-24Y and C9350-24S both have 24 fiber ports, but C9350-24Y runs SFP28 at up to 25G against 1G SFP on the other model. Fiber links that stay at 1G can move to C9350-24S and its 448 Gbps of switching. Where 12 links at 25G are enough, C9350-12Y keeps the same SFP28 ports on one ASIC instead of two, with 1,000 Gbps of switching and a 200G uplink slot. Of these four models, only C9350-24Y takes the 400G C9350-NM-4C and C9350-NM-8L modules. A 1G fiber block with more than 24 links moves to C9350-48S, which takes the Large (48 ports) subscription tier instead of Medium (up to 24 ports).
Ordering Checklist
- Subscription tier: Select LIC-CS-AC1-M-E or LIC-CS-AC1-M-A, the Access Tier 1 Medium (up to 24 ports) subscription, with a term of 36 months or longer. Large (48 ports) SKUs do not match this switch.
- Uplink module: Put C9350-NM-2C, C9350-NM-4C, C9350-NM-8Y, C9350-NM-8L or C9350-NM-8M on its own line. The base switch ships with an empty uplink slot.
- SFP28 optics: Order an optic or cable for every port in use. The switch comes with only its 500W supply, an RFID module and two 19-inch brackets.
- Second power supply and cords: Add PWR-C2-500WAC-I/2, PWR-C2-850WAC-I/2 or PWR-C2-1600WAC-I/2 for N+1 redundancy, plus one cord per supply, such as CAB-TA-NA for a 500W or 850W unit and C9K-PWR-CAB-AC-US for a 1600W unit. Cords are not bundled with any supply.
- Stacking cables: A data stack needs STACK-T1A-50CM, STACK-T1A-1M or STACK-T1A-3M=, and none ship with the switch. Add CAB-SPWR-35CM or CAB-SPWR-100CM only when members will share power over StackPower+. Catalyst 9300 stack and StackPower cables are not compatible.
- HSECK9 for IPsec: IPsec needs OS Advantage and one HSECK9 per switch, every stack member included. Give Cisco the Smart Account and Virtual Account at order so SLAC is factory-installed; Catalyst Center cannot generate SLAC for this series.
Optional Add-ons
|
Model |
Description |
|---|---|
|
Cisco C9350 network module, 2 x 100G/40G QSFP28, up to 200 Gbps | |
|
Cisco C9350 network module, 4 x 100G/40G QSFP28, up to 400 Gbps | |
|
Cisco C9350 network module, 8 x 25G/10G/1G or 4 x 50G SFP56, up to 200 Gbps | |
|
C9350-NM-8L |
Cisco C9350 network module, 8 x 50G/25G/10G/1G SFP56, up to 400 Gbps |
|
C9350-NM-8M |
Cisco C9350 network module, 8 x Multigigabit RJ-45, up to 80 Gbps |
|
PWR-C2-500WAC-I/2 |
500W AC Platinum secondary power supply |
|
PWR-C2-850WAC-I/2 |
850W AC Platinum secondary power supply |
|
PWR-C2-1600WAC-I/2 |
1600W AC secondary power supply |
|
StackWise-1.6T stacking cable, 50 cm | |
|
StackWise-1.6T stacking cable, 1 m | |
|
StackWise-1.6T stacking cable, 3 m | |
|
CAB-SPWR-35CM |
StackPower+ cable, 35 cm |
|
CAB-SPWR-100CM |
StackPower+ cable, 100 cm |
|
C9350-FAN-I= |
C9350 port inlet fan module, spare |
Specifications
| Parameter | Specification | Parameter | Specification |
|---|---|---|---|
| Product ID | C9350-24Y | Product type | Stackable fiber access and aggregation switch |
| Network license | Switching Essentials or Switching Advantage | Minimum software release | Cisco IOS XE 26.2.1 |
| Downlink ports | 24 x 1G/10G/25G SFP28 | Network module slot | 1, up to 400G |
| Supported network modules | C9350-NM-2C, C9350-NM-4C, C9350-NM-8Y, C9350-NM-8L, C9350-NM-8M | Console port | USB Type-C and RJ-45 |
| Management port | RJ-45 10/100/1000 | USB port | USB Type-C |
| Switching capacity | 2,000 Gbps | Forwarding rate | 1,488 Mpps |
| Switching capacity with stacking | 3,600 Gbps | Forwarding rate with stacking | 2,678.4 Mpps |
| Packet buffer | 36 MB (18 MB per ASIC) | ASIC | 2 x Cisco Silicon One A100/L |
| DRAM | 16 GB | Flash | 18 GB |
| SSD storage | Up to 240 GB (USB 3.0 SSD slot) | App hosting resources | 2 x 1G/10G AppGig ports; 4 vCPU; 8 GB DRAM |
| MAC addresses | Up to 64,000 | VLAN IDs | 4,094 |
| Active VLANs | Up to 4,000 | Switched virtual interfaces | Up to 4,000 |
| PVST instances | Up to 1,000 | IPv4 routes | Up to 192,000 |
| IPv6 routes | Up to 96,000 | ARP entries | Up to 64,000 |
| NDP entries | Up to 32,000 | Multicast routes | Up to 8,000 (IPv4) / 4,000 (IPv6) |
| IGMP snooping groups | Up to 8,000 IGMP / 4,000 MLD | ACL entries | Up to 5,000 (IPv4) / 2,500 (IPv6) |
| QoS entries | Up to 2,000 (IPv4) / 1,000 (IPv6) | Flexible NetFlow entries | Up to 64,000 (IPv4) / 32,000 (IPv6) |
| Jumbo frames | 9,216 bytes | Stacking | StackWise-1.6T, 1.6 Tbps, up to 8 C9350 members |
| StackPower | StackPower+ 55V power sharing, up to 4 switches per ring | Management features | Cisco Catalyst Center or Meraki Dashboard |
| Default power supply | PWR-C2-500WAC-I 500W AC | Power supply slots | 3, hot-swappable |
| Power redundancy | Combined (default) or N+1 redundant | Power connector | AC IEC 60320 C16 |
| Fan modules | 3 field-replaceable, N+1 redundant, rear access | Airflow | Front to back |
| Dimensions (H x W x D) | 1.73 x 17.5 x 17.9 in. (4.4 x 44.5 x 45.6 cm) with 500W supply | Operating temperature | -5°C to 45°C up to 1,830 m (6,000 ft); -5°C to 40°C up to 3,000 m (10,000 ft) |
| Cold start temperature | 0°C | Storage temperature | -40°C to 75°C |
| Operating humidity | 10% to 95%, noncondensing | Operating altitude | Up to 3,000 m (10,000 ft) |
| Storage altitude | Up to 4,500 m (15,000 ft) | MTBF | 395,310 hours |
| Safety certifications | IEC 60950-1, EN 60950-1, IEC 62368-1, UL 60950-1, UL 62368-1, AS/NZS 60950.1, CAN/CSA-C22.2 No. 60950-1-07, CAN/CSA-C22.2 No. 62368-1-14, GB 4943, NOM-019-SCFI | EMC certifications | 47 CFR Part 15 Class A, EN 55032 Class A, CISPR 32 Class A, EN 55024, CISPR 24, EN 300 386, EN 61000-3-2, EN 61000-3-3, ICES-003 Class A, CNS13438 Class A, KN 32 Class A, KN 35, TCVN 7189 Class A, TCVN 7317, V-2/V-3 Class A |
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