Replacement for CSS11503-DC: Drop-In Alternatives We Stock
Looking for a replacement for the CSS11503-DC (CSS11503-DC - Cisco System Inc 11500 16 x Ports 1000Base-T + 3 x SFP Expansion Slot Layer 3 Managed Gigabit Ethernet Switch)? Pro Disk Network ships Cisco drop-in replacements and equivalent modern parts from US inventory. Every alternate below is in-stock today with same-day shipping for orders placed before 2pm ET. If your unit is still under warranty, contact our engineering team — we offer cross-shipping for B2B customers on Net 30 terms.
About the CSS11503-DC
| SKU | CSS11503-DC |
|---|---|
| Product | CSS11503-DC - Cisco System Inc 11500 16 x Ports 1000Base-T + 3 x SFP Expansion Slot Layer 3 Managed Gigabit Ethernet Switch |
| Stock status | In Stock |
| Detail page | View CSS11503-DC › |
Drop-in replacements for CSS11503-DC
Each part below is currently in our US warehouse, ships same-day for orders before 2pm ET, and includes our 90-day warranty. SKUs link to the full product page with photos, datasheets and B2B quote form.
N55-M8P8FP-RF - Cisco N55-M8P8FP 16 x Expansion Slot SFP+ (mini-GBIC) Expansion Module for Nexus 5000 Series Switch
SKU: N55-M8P8FP-RF
Price: $4,393.29
WS-C2960L-16TS-LL - Cisco Catalyst 2960 RJ-45 16 x Ports 10/100/1000Base-T + 2 x SFP Ports Layer 3 Managed Gigabit Ethernet Switch
SKU: WS-C2960L-16TS-LL
Price: $3,316.33
SFP-OC48-SR-RF - Cisco SFP-OC48-SR - Cisco 2.5Gb/s OC-48/STM-16 SR-1 Single-Mode Fiber 2km 1310nm Duplex LC Connector SFP Transceiver Module
SKU: SFP-OC48-SR-RF
Price: $113.36
641146-B21 - HP Cisco B22HP Fabric Extender - Expansion Module - 16 Ports
SKU: 641146-B21
Price: $163.16
N55-M16P - Cisco Nexus 5500 16 x Ports 10 Gigabit Ethernet Expansion Module
SKU: N55-M16P
Price: $286.84
WS-X6716-10G-3C - Cisco Catalyst 6500 Series 16 x Ports 10 Gigabit Ethernet Expansion Module
SKU: WS-X6716-10G-3C
Price: $610.53
WS-X6716-10GE - Cisco Catalyst 6500 Series 16 x Ports 10 Gigabit Ethernet Expansion Module
SKU: WS-X6716-10GE
Price: $695.91
658591-001 - HP Cisco Nexus B22 Fabric Extender 16 Ports Expansion Module
SKU: 658591-001
Price: $1,591.58
WS-X6716-10T-3C - Cisco Catalyst 6500 Series 16 x Ports 10 Gigabit Ethernet Expansion Module
SKU: WS-X6716-10T-3C
Price: $2,969.96
WS-X6716-10T-3CXL - Cisco Catalyst 6500 Series 16 x Ports 10 Gigabit Ethernet Expansion Module
SKU: WS-X6716-10T-3CXL
Price: $3,246.67
How we pick replacements
Every recommendation above was selected using these criteria:
- Drop-in compatibility — same form factor (2.5"/3.5", PCIe slot, SFP port, etc.), so it fits the original chassis without modification
- Equivalent or better performance — matched on RPM/IOPS/speed/throughput, never downgraded
- Same-brand-preferred — we list the OEM-equivalent first when available, then trusted aftermarket
- Warranty coverage — 90-day Pro Disk warranty on every part, with 1-year option for B2B
- In stock today — never recommend a part that is on backorder
Need help confirming compatibility?
Our engineers validate every replacement against your specific server, switch, or chassis model before shipment. Email sales@prodisknetwork.com with your platform model (e.g., Dell PowerEdge R740, HP DL380 Gen10, Cisco Catalyst 9300) and we will confirm the exact part number that drops into your hardware.