WS-C3550-24PWR-EMI - Cisco Catalyst 3550 24-Ports 10/100BaseT + 2 x SFP (mini-Gbic) Layer 4 Managed Fast Ethernet Network Switch

WS-C3550-24PWR-EMI - Cisco Catalyst 3550 24-Ports 10/100BaseT + 2 x SFP (mini-Gbic) Layer 4 Managed Fast Ethernet Network Switch

SKU: WS-C3550-24PWR-EMI Brand: Cisco Browse: Cisco Network Switches Category: Network Switches
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Specifications

Part Identification

Order & Fulfillment Details

  • Condition

    Refurbished

    Quality Tier
    Professionally tested — new available on request

  • Warranty

    90-Day Pro Disk Network Warranty

    Coverage
    Advance replacement — we ship first, you return the faulty unit

  • Shipping

    Free over $150 — Same-Day Dispatch

    Cutoff
    Orders placed before 3pm ET

  • Returns

    30-Day Returns — US

    Return Window
    Original packaging required
Part Number / MPNWS-C3550-24PWR-EMI
ManufacturerCisco
CategoryNetwork Switches
ConditionRefurbished — new available on request
Warranty90-Day Pro Disk Network Warranty — advance replacement
ShippingFree over $150 — Same-Day Dispatch
Returns30-Day Returns — US
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The WS-C3550-24PWR-EMI is a Cisco network switches component. Pricing on the WS-C3550-24PWR-EMI is quote-based — email sales@prodisknetwork.com or use our live chat for a quote within one business day.

Reviewed by: — . Specifications, compatibility, and pricing for the WS-C3550-24PWR-EMI are shown on this page.

  • US-based LLC — 7345 W Sand Lake Rd, STE 210, Office 3208, Orlando, FL 32819
  • Same-Day US Shipping — orders before 3pm ET ship today via UPS
  • 30-Day Returns — pre-paid label on DOA and defective items

Looking for more Cisco parts? Browse the full Pro Disk Network Cisco catalog › Same-day US shipping, 30-day returns on every Cisco order.

Have technical questions about network switches? Real questions from IT engineers, answered by Pro Disk Engineering ›

Quick Answer: Is the WS-C3550-24PWR-EMI compatible with my switch?

Pro Disk Network validates every WS-C3550-24PWR-EMI against the target switch's published compatibility matrix before shipment. If you let us know your switch model and firmware version, we will confirm fitment and code the module appropriately (Cisco-coded, Juniper-coded, HPE-coded, etc.) at no extra charge.

How fast does the WS-C3550-24PWR-EMI ship?

Pro Disk Network dispatches the WS-C3550-24PWR-EMI same-day on orders confirmed before 3 pm ET. Multi-pallet projects requiring crating ship within 2 business days. International shipping (Canada, Mexico, EU, APAC) takes 3-7 business days via DHL Express or FedEx International Priority.

Email engineering for a compatibility check ›

Common Use Cases for WS-C3550-24PWR-EMI

The WS-C3550-24PWR-EMI is deployed by US enterprises, MSPs, government, and education customers across multiple infrastructure scenarios. Below are the most common deployment patterns Pro Disk Network sees in real-world orders.

  • DCI (Data Center Interconnect) — Inter-DC routing or aggregation. LR4/LR8 transceivers for 10–80 km, ER4 for 40 km, ZR4 for coherent long-haul.
  • Campus Distribution — Catalyst-class campus distribution between IDF and MDF closets. PoE+ where wireless APs and IP phones share infrastructure.
  • Branch / Edge — Smaller form-factor switches and routers for branch sites. SD-WAN-compatible or static-VPN-attached as the architecture dictates.

What is the WS-C3550-24PWR-EMI?

The WS-C3550-24PWR-EMI is a Cisco enterprise networking device, manufactured by Cisco. Pro Disk Network ships this part new and certified-refurbished from our US warehouse with same-day dispatch on orders placed before 3 PM ET, backed by a 30-day return guarantee.

Pros & Cons of WS-C3550-24PWR-EMI

Pros

  • Matched-pair option for redundant link orders
  • Cabling and DAC/AOC labels clearly mark optic class

Cons

  • Refurbished switches may show minor rack-rail wear
  • Power supplies sold separately on certain SKUs
  • Long-haul ZR4/CFP4 modules subject to export-control screening

Frequently Asked Questions about WS-C3550-24PWR-EMI

Is the WS-C3550-24PWR-EMI a genuine Cisco part?
Yes. Pro Disk Network sources every WS-C3550-24PWR-EMI as factory-original Cisco inventory. New units arrive sealed in OEM packaging; refurbished units are pulled from decommissioned Cisco servers, surface-tested, and re-warranted by Pro Disk Network for 90 days.
Is the WS-C3550-24PWR-EMI compatible with my switch?
Pro Disk Network validates every WS-C3550-24PWR-EMI against the target switch's published compatibility matrix before shipment. If you let us know your switch model and firmware version, we will confirm fitment and code the module appropriately (Cisco-coded, Juniper-coded, HPE-coded, etc.) at no extra charge.
How fast does the WS-C3550-24PWR-EMI ship?
Pro Disk Network dispatches the WS-C3550-24PWR-EMI same-day on orders confirmed before 3 pm ET. Multi-pallet projects requiring crating ship within 2 business days. International shipping (Canada, Mexico, EU, APAC) takes 3-7 business days via DHL Express or FedEx International Priority.
What is the warranty on the WS-C3550-24PWR-EMI?
New WS-C3550-24PWR-EMI units carry the full Cisco manufacturer warranty (typically 1 to 5 years depending on product line). Refurbished and bulk-OEM units include a Pro Disk Network advance-replacement warranty (90 days refurbished). DOA replacement is free within 30 days of receipt.
Do you offer bulk pricing for the WS-C3550-24PWR-EMI?
Email sales@prodisknetwork.com with the quantity and target ship date for a quote within one business day.

Volume Pricing for WS-C3550-24PWR-EMI

Similar Products

From the Same Series as WS-C3550-24PWR-EMI

Other parts that share the WS series prefix — useful when sourcing matched lots, hot-spare pools, or capacity-tier expansions.

  • WS-C3560-24TS-S — WS-C3560-24TS-S - Cisco Catalyst 3560 24 x Ports 10/100Base-T + 2 x 10GE (X2) Layer 3 Managed Fast Ethernet Network Switch — $219.67
  • WS-C3560-48PS-S — WS-C3560-48PS-S - Cisco Catalyst 3560 Series PoE-48 Ethernet Switch — $300.56
  • WS-C3560-48TS-S — WS-C3560-48TS-S - Cisco Catalyst 3560 48 x Ports 10/100Base-T + 4 x SFP Layer 3 Managed Fast Ethernet Network Switch — $237.95
  • WS-C3560CG-8PC-S — WS-C3560CG-8PC-S - Cisco Catalyst PoE RJ-45 8 x Ports 10/100/1000Base-TX + 2 x combo Gigabit SFP Gigabit SFP managed desktop Gigabit Ethernet Switch — $2,295.12
  • WS-C3560CX-12PD-S — WS-C3560CX-12PD-S - Cisco Catalyst 3560-CX Series PoE+ 12 x Ports 10/100/1000Base-T + 4 x SFP Layer 3 Managed Rack-Mountable Gigabit Ethernet Network Switch — $3,869.71
  • WS-C3560CX-12TC-S — WS-C3560CX-12TC-S - Cisco Catalyst 3560-CX Series 12 x Ports 10/100/1000Base-T + 4 x SFP Layer 3 Managed Rack-Mountable Gigabit Ethernet Network Switch — $2,096.38
  • WS-C3560CX-8PC-S — WS-C3560CX-8PC-S - Cisco ONE Catalyst PoE+ RJ-45 8 x Ports 10/100/1000Base-T + 1G Uplinks Layer 2 Managed Rack Mountable Gigabit Ethernet Switch — $2,222.77
  • WS-C3560CX-8PT-S — WS-C3560CX-8PT-S - Cisco One Catalyst 3560CX-8PT-S PoE+ RJ-45 8 x Ports 10/100/1000Base-T + 1G Uplinks Layer 2 Managed Rack Mountable Gigabit Ethernet Switch — $742.25
  • WS-C3560CX-8TC-S — WS-C3560CX-8TC-S - Cisco ONE Catalyst RJ-45 8 x Ports 10/100/1000Base-T + 1G Uplinks Layer 2 Managed Rack Mountable Gigabit Ethernet Switch — $1,889.48
  • WS-C3560CX-8XPD-S — WS-C3560CX-8XPD-S - Cisco ONE Catalyst PoE RJ-45 8 x Ports 10/100/1000Base-T + 1G Uplinks Layer 2 Managed Rack Mountable Gigabit Ethernet Switch — $3,333.38
  • WS-C3560G-24PS-E — WS-C3560G-24PS-E - Cisco Catalyst 3560G PoE 24 x Ports 10/100/1000Base-T + 2 x 10GE (X2) Layer 3 Managed Gigabit Ethernet Network Switch — $333.21
  • WS-C3560G-48TS-E — WS-C3560G-48TS-E - Cisco Catalyst 3560 48-Ports 48 x 10/100/1000Base-T + 4 x SFP Layer 3 Managed Gigabit Ethernet Network Switch — $760.00

Pro Disk Network Buyer’s Guide: Network Switches

Optic Coding, Vendor Lock-In, and Multi-Vendor Compatibility

If you are running a multi-vendor leaf-spine architecture (Arista leaves and Cisco spines, for example), order optics coded for each endpoint separately. Optics in DAC and AOC cables are factory-coded to each end and cannot be flashed in-field. Plan the coding split at design time and document it in your network drawings.

Bandwidth Sizing for Spine-Leaf, EVPN-VXLAN, and Hyperconverged Storage

Sizing network bandwidth for a leaf-spine fabric using the WS-C3550-24PWR-EMI starts with the workload mix. For general-purpose virtualisation, plan 10G server-to-leaf, 25G or 40G leaf-to-spine; oversubscription up to 4:1 is acceptable. For hyperconverged storage (vSAN, Ceph, Storage Spaces Direct), plan 25G server-to-leaf at minimum, 100G leaf-to-spine, oversubscription 1.5:1 maximum. East-west traffic dominates in HCI clusters and starves on oversubscribed fabrics.

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Network switches, routers, firewalls, NICs, SFP and QSFP transceivers, DAC cables, wireless access points.

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