Replacement for LL-3550-EMI: Drop-In Alternatives We Stock
Looking for a replacement for the LL-3550-EMI (LL-3550-EMI - Cisco Enhanced Multilayer Software Image License 1 Switch(es) Standard License)? 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 LL-3550-EMI
| SKU | LL-3550-EMI |
|---|---|
| Product | LL-3550-EMI - Cisco Enhanced Multilayer Software Image License 1 Switch(es) Standard License |
| Stock status | In Stock |
| Detail page | View LL-3550-EMI › |
Drop-in replacements for LL-3550-EMI
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.
050-332-940 - Cisco RPS 2300 Redundant Power Supply For Catalyst 2950 / 2960 / 3550 / 3560 / 3750 / 3750e / 3560e
SKU: 050-332-940
Price: $168.84
800-27672-02 - Cisco RPS 2300 Redundant Power Supply For Catalyst 2950 / 2960 / 3550 / 3560 / 3750 / 3750e / 3560e
SKU: 800-27672-02
Price: $168.84
ACN-050-332-940 - Cisco 2300-Watt Redundant Power Supply for Catalyst 2950 2960 3550 3560 3750 3750-E
SKU: ACN-050-332-940
Price: $255.70
COM8X10ARA - Cisco RPS 2300 Redundant Power Supply for Catalyst 2950 / 2960 / 3550 / 3560 / 3750 / 3750e / 3560e
SKU: COM8X10ARA
Price: $357.09
PWR300-AC-RPS-N1 - Cisco 300-Watts AC Power Supply for 2950 / 3550
SKU: PWR300-AC-RPS-N1
Price: $405.26
AIR-CAS-3KC-K9 - Cisco Context-Aware Software - License - 3000 Client
SKU: AIR-CAS-3KC-K9
Price: $4,175.89
74-7105-01 - Cisco EHWIC-4ESG 4-Port Gigabit Ethernet Enhanced High-Speed WAN Interface Card
SKU: 74-7105-01
Price: $128.95
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.