The 4451-X is a Cisco routers component. Pricing on the 4451-X is quote-based — email sales@prodisknetwork.com or use our live chat for a quote within one business day.
The 4451-X is a Cisco routers part. Email sales@prodisknetwork.com with your system make, model, and serial number - we will confirm compatibility and ship same-day if in stock.
How fast does the 4451-X ship?
If in stock, the 4451-X ships same business day on US orders placed before 3 pm ET. Most US ZIP codes receive next-business-day or 2-day delivery via FedEx/UPS Ground or Express. Bulk and project orders shipping in pallets are typically dispatched within 24-48 hours.
The 4451-X 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.
Spine-Leaf Fabric — Top-of-rack 25G/100G aggregation between leaf and spine switches. Match speed and form factor across both endpoints.
Server Uplink — 10G/25G server-to-leaf uplink — pair with matching DAC or AOC at the host NIC to avoid optic mismatch.
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.
What is the 4451-X?
The 4451-X 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 4451-X
Pros
Matched-pair option for redundant link orders
Cabling and DAC/AOC labels clearly mark optic class
Cons
Third-party optic — some firmware revs require "service unsupported transceiver-type"
Bulk DAC orders may ship LTL on >100-pc reels
Confirm transceiver coding before mixing vendors in the same chassis
Frequently Asked Questions about 4451-X
Is the 4451-X a genuine Cisco part?
Yes. Pro Disk Network sources every 4451-X 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.
Will the 4451-X fit my system?
The 4451-X is a Cisco routers part. Email sales@prodisknetwork.com with your system make, model, and serial number - we will confirm compatibility and ship same-day if in stock.
How fast does the 4451-X ship?
If in stock, the 4451-X ships same business day on US orders placed before 3 pm ET. Most US ZIP codes receive next-business-day or 2-day delivery via FedEx/UPS Ground or Express. Bulk and project orders shipping in pallets are typically dispatched within 24-48 hours.
What is the warranty on the 4451-X?
New 4451-X 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 4451-X?
Email sales@prodisknetwork.com with the quantity and target ship date for a quote within one business day.
Other parts that share the 4451 series prefix — useful when sourcing matched lots, hot-spare pools, or capacity-tier expansions.
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445120-002 — 445120-002 - HP System Board (Motherboard) for ProLiant DL185 Gen5 / DL165 Gen6 — $194.74
445120-008 — 445120-008 - HP System Board for ProLiant DL185 G5 — $280.00
445120-00A — 445120-00A - HP System Board (Motherboard) for ProLiant DL185 G5 — $557.50
445120-00B — 445120-00B - HP System Board (Motherboard) for ProLiant DL185 G5 — $663.16
445122-001 — 445122-001 - HP PCI-x Riser Kit for ProLiant DL160 G5 DL165 G5 — $117.89
Pro Disk Network Buyer’s Guide: Routers
Optic Coding, Vendor Lock-In, and Multi-Vendor Compatibility
Networking optics — SFP, SFP+, QSFP+, QSFP28 — are physically interoperable across vendors but logically restricted by firmware coding. The 4451-X is coded for a specific vendor family at our factory step before shipping, which preserves the OEM warranty workflow and allows the optic to be recognised without ‘service unsupported-transceiver’ CLI overrides. Mixing third-party optics with same-vendor optics in the same chassis is safe; mixing across vendor codings sometimes triggers warnings in the switch log.
Bandwidth Sizing for Spine-Leaf, EVPN-VXLAN, and Hyperconverged Storage
For EVPN-VXLAN overlays, the 4451-X carries the underlay tunnels in addition to the workload traffic. Plan for VXLAN encapsulation overhead (50 bytes) plus MTU headroom; set the underlay MTU to 9216 (jumbo frames) and the overlay MTU to 9000. Make sure both the 4451-X and the connected NICs support jumbo frames — some older NICs cap at 9000-byte payloads even when jumbo-enabled.