Cisco C9300X-12Y-E Catalyst 9300X 12-Port 25G/10G/1G SFP28 Fiber Switch (Network Essentials)

The Cisco C9300X-12Y-E is a next-generation hardware-accelerated fiber access and distribution switch belonging to the premium Cisco Catalyst 9300X Series. This high-performance 12-port SFP28 switch supports line-rate 1G, 10G, and 25G optical connections natively across all downlink ports, running on the dependable Network Essentials software package.

Designed for high-bandwidth aggregation, dense storage area networks (SAN), and fiber-to-the-desk topologies, the C9300X-12Y-E provides massive stacking bandwidth via StackWise-1T (1 Tbps). Featuring an architecture built for flexible modular uplinks up to 100G, it is the ultimate core block for high-density fiber routing and enterprise optical distribution networks.

When auditing your network topology or drafting a hardware bill of materials (BOM), leverage the definitive parameters below for the Cisco Catalyst C9300X-12Y-E:

Future-proof your fiber infrastructure by pairing your C9300X-12Y-E with official hot-swappable expansion components:

• C9300X-NM-4C: Catalyst 9300X 4 x 100G QSFP28 Network Module

• C9300X-NM-4M: Catalyst 9300X 4 x 10G/25G SFP28 Multi-rate Module

• C9300X-NM-2C: Catalyst 9300X 2 x 100G QSFP28 Network Module

• C9300X-NM-8M: Catalyst 9300X 8 x 10G/25G SFP28 Multi-rate Module

• C9300X-STACK-KIT Cisco Catalyst 9300X Stacking Module Spare

• STACK-T1-50CM / STACK-T1-1M / STACK-T1-3M: Type 1 high-speed stacking cables (50cm, 1m, 3m options)

• PWR-C1-715WAC-P: 715W AC Platinum-certified Primary Power Supply Unit

A: There are two main differences: hardware generation and software licensing. The C9300X-12Y-E belongs to the "X" hardware generation, which features a faster architecture supporting 1 Tbps stacking bandwidth (StackWise-1T) and 100G modular uplinks, whereas the older C9300 generation tops out at 480 Gbps stacking. Regarding software, the -E suffix denotes Network Essentials, which covers essential Layer 2 and core Layer 3 routing (OSPF, Static, RIP). The -A suffix (Network Advantage) would unlock full enterprise protocols like BGP and EVPN-VXLAN.

A: Yes. All 12 downlink slots on the C9300X-12Y-E are completely backward compatible. You can deploy 25G SFP28, 10G SFP+, or 1G SFP optical transceivers, as well as Direct Attach Copper (DAC) cables and Active Optical Cables (AOC) in the same cages without any hardware reconfiguration.

A: Because this switch features a modular network module slot, you can expand your backbone bandwidth over time. For example, by inserting a C9300X-NM-4C module into the front expansion slot, you instantly add 4 x 100G QSFP28 ports to connect directly to your high-speed data center core switches.

A: This switch is backed by the official Cisco Enhanced Limited Lifetime Warranty (E-LLW). It provides Next-Business-Day (NBD) advance hardware replacement shipping (where logistically supported) and 90 days of 8x5 Cisco Technical Assistance Center (TAC) software support. For high-availability data layouts, optional Cisco Smart Net Total Care (SmartNet) contracts are available through our service desk.

A: Yes, but with a performance limitation. The C9300X-12Y-E natively supports StackWise-1T (1000 Gbps). When stacked with standard Catalyst 9300 models, the stacking fabric will automatically backward-adapt and drop down to the standard StackWise-480 (480 Gbps) speed of the slower models to maintain cluster synchronization.