Cisco 1921

Network · 1U Rack / Desktop

Lifecycle confidence: ●●●●○ · Last refreshed 2026-05-31

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Lifecycle

Released
2009-07-01
General Availability
2009-10-01
End of Sale
2018-09-29
End of Support
2023-09-30
End of Service Life
2023-09-30

EOL

Failure Outlook

Age: 15.7 years

Failure likelihood: 78%

Likely to fail (most → least)

  • Internal AC power supply (single, non-redundant, 60W)
  • Internal USB flash memory (256MB, fixed)
  • Capacitors on main board
  • EHWIC slot connectors (wear from module swaps)
  • Fan assembly (continuous duty cycle)
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Indicative TPM Pricing

Indicative — not a quote.

SLA tierAnnualMonthly
9×5 NBD $300 – $550 $25 – $46
24×7 NBD $390 – $715 $32 – $60
24×7×4 onsite + parts $540 – $1,100 $45 – $92
24×7×4 remote only $270 – $770 $22 – $64

Pricing confidence: ●●○○○

Monthly = annual ÷ 12. Real TPM monthly billing is typically ~5–10% higher than this — use annual for accurate budgeting.

Get a real quote:

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Bushido is an information service. We do not sell maintenance contracts — partners listed above do.

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守

Security Advisories (0)

No advisories on file.

Parts Market

Whole unit: $40 – $150

Common parts

  • HWIC-1DSU-T1 (T1 WAN card) — $20
  • MEM-1900-512MB (512MB DRAM) — $15
  • EHWIC-4ESG (4-port GE EHWIC) — $30
  • PWR-1921-51W (51W AC Power Supply) — $25

Modern Replacements

Direct successor: Cisco ISR4221/K9 (2016) — ISR 4000 Series; multicore IOS XE; 2 GE WAN + 2 NIM slots; 35-75 Mbps throughput; SD-WAN capable

Current generation: Cisco C1111-8P (2018) — ISR 1100 Series; IOS XE; 8x GE LAN + dual GE WAN; SD-WAN/Catalyst SD-WAN ready; compact desktop form factor

Power / Rack

Idle: 30W · Typical: 45W · Max PSU: 60W

1U

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Standard Bill of Materials (at GA)

The base Cisco 1921 (CISCO1921/K9) ships as a 1U rack-mountable or desktop branch router with two onboard 10/100/1000 Mbps Gigabit Ethernet RJ-45 ports (LAN/WAN), two Enhanced High-Speed WAN Interface Card (EHWIC) slots supporting one double-wide or two single-wide EHWIC/HWIC modules, 512 MB DDR2 DRAM (fixed, non-expandable), 256 MB internal USB flash storage, one external USB 2.0 Type-A port, one RJ-45 serial console port, one USB mini-B console port, one RJ-45 auxiliary port, a hardware-accelerated IPsec/SSL encryption engine, and a single internal 60 W AC power supply. The unit ships with Cisco IOS Software Universal image with IP Base technology license activated; Security, Data, and UC licenses are available as add-on software activations. An optional 51 W PoE power supply (PWR-1921-51W) is available for modules requiring inline power.

ComponentDescriptionPart #QtyNotes
Chassis Cisco 1921 ISR G2 chassis, 1U rack/desktop, with 2x GE RJ-45 LAN/WAN, 2x EHWIC slots, console/aux ports CISCO1921/K9 1 SEC variant (CISCO1921-SEC/K9) includes Security license; DC variant (CISCO1921DC/K9) uses DC input
DRAM 512 MB DDR2 DRAM (fixed onboard, non-upgradeable) — 1 Default and maximum; soldered to motherboard — not a replaceable DIMM
Flash Storage 256 MB internal USB flash memory (fixed) — 1 Default and maximum internal flash; additional storage via external USB Type-A port
Power Supply Internal 60 W AC power supply, 100–240 V, 50/60 Hz PWR-1921-51W 1 Standard AC PSU; optional 51 W PoE PSU for PoE module support; no redundant PSU option
LAN/WAN Interfaces 2x onboard 10/100/1000BASE-T Gigabit Ethernet RJ-45 ports — 1 Integrated on motherboard; serve dual LAN/WAN role depending on configuration
EHWIC Slots 2x Enhanced High-Speed WAN Interface Card (EHWIC) slots — 1 Accepts 2x single-wide EHWIC/HWIC or 1x double-wide EHWIC-D; no ISM slot (unlike 1941)
IOS Software License Cisco IOS Universal Image with IP Base technology package license SL-1921-IP-BASE-K9 1 Security (SL-1921-SEC-K9), Data (SL-1921-DATA-K9), and UC licenses sold separately
Rack Mount Kit Optional 19-inch EIA rack-mount ears ACS-1921-RM-19 1 Wall-mount also supported per installation guide; not included by default in all SKUs

BOM reflects the standard base CISCO1921/K9 configuration at GA. EHWIC, HWIC, VWIC, and WLAN module variants (e.g., EHWIC-4ESG, HWIC-1DSU-T1, VWIC3-1MFT-T1/E1) are not enumerated. The SEC, DC-power, ADSL, T1, and 3G bundle SKUs have different default components. IOS software end of maintenance was September 2019; no further feature or security updates are issued. Service part numbers may have been superseded; cross-reference with Cisco's spare-parts portal before ordering.

BOM is AI-synthesized from public datasheets. Cross-reference with the vendor's spare-parts portal before ordering.

Firmware

  • IOS: 15.7(3)M10

Download pointer ↗

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Next Steps

  • Want a real maintenance quote? → See the partner list in the pricing block above
  • Want to replace it? → See the modern replacements section
  • Want to repair it yourself? → Check secondhand pricing in the parts market block
  • Want the latest firmware? → Vendor download page ↗
  • Want to verify our data? → Cross-reference with the vendor's own EOL bulletin and authoritative aggregators. Every field carries a confidence score above.

Bushido is an information service. We do not sell maintenance, parts, or support — partners listed above do.