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Old, obsolete, low or no value — we buy the Cisco SISR4451XUK9-38S (Cisco ISR 4451-X IOS XE UNIVERSAL) in bulk, working or not, and handle the logistics. No testing, no boxing, no cherry picking. The problem disappears.

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SISR4451XUK9-38S Lifecycle and Specs

Cisco support for the SISR4451XUK9-38S ended on October 31, 2025. Hardware past its last date of support can no longer be covered by a Cisco service contract, which is usually when organizations retire it.

Part numberSISR4451XUK9-38S
Cisco descriptionCisco ISR 4451-X IOS XE UNIVERSAL
Product familyCisco ASR 1000
End-of-life announcedApril 30, 2020
End of saleOctober 29, 2020
Last date of supportOctober 31, 2025

Dates and descriptions from Cisco’s end-of-sale and end-of-life announcement.

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