Cisco 1921
Network · 1U Rack / Desktop
Lifecycle
- Released
- 2009-10-19
- General Availability
- 2010-01-01
- End of Sale
- 2018-09-29
- End of Support
- 2023-09-30
- End of Service Life
- 2023-09-30
EOL
When a vendor has not published an exact date, we render an estimated range with an explicit confidence score — never an empty cell. See how to read TPM library records honestly.
Failure Outlook
Age: 15.5 years
Failure likelihood: 78%
Likely to fail (most → least)
- Internal AC power supply capacitors
- Onboard flash (eUSB) corruption
- EHWIC slot connectors (wear/oxidation)
- Fan bearings (continuous operation units)
- NVRAM battery (config retention)
Indicative TPM Pricing
Indicative — not a quote.
| SLA tier | Annual | Monthly |
|---|---|---|
| 9×5 NBD | $150 – $350 | $12 – $29 |
| 24×7 NBD | $195 – $455 | $16 – $38 |
| 24×7×4 onsite + parts | $270 – $700 | $22 – $58 |
| 24×7×4 remote only | $135 – $490 | $11 – $41 |
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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Security Advisories (0)
No advisories on file.
Parts Market
Whole unit: $30 – $150
Common parts
- HWIC-1DSU-T1 T1/WAN card — $15
- AC Power Supply (PWR-1921-AC) — $25
- EHWIC-4ESG 4-port GE switch card — $20
- Rack-mount ears kit (ACS-1900-RM-19) — $10
Find parts for this unit
Bushido publishes the standard bill of materials above. For substitute part chains, current pricing, and serial- or service-tag-specific configurations, go straight to the manufacturer's own portal — the authoritative source. We don't scrape or resell parts data, and we earn nothing from these links.
Cisco — official sources
Cisco spare-part sourcing runs through Cisco Commerce / partners; the support product page lists compatible modules and optics.
No single manufacturer publishes a cross-vendor "alternative parts" list, and no one official aggregates across all vendors. Lenovo and HPE expose substitute chains publicly; Dell and Sun/Oracle keep them internal or gated. These links are the honest map of where each vendor's data actually lives. If a link is dead or a portal has moved, tell us and we'll fix it.
Modern Replacements
Direct successor: Cisco ISR4221/K9 (2016) — Direct 1RU branch replacement; IOS XE; 2x GE WAN ports; 2x NIM slots; up to 75Mbps with boost license
Current generation: Cisco Catalyst 1200 / ISR 1100 (2019) — C1111-8P (ISR 1100 series) is the current-gen compact branch router successor for small-branch deployments
Power / Rack
Idle: 20W · Typical: 35W · Max PSU: 60W
1U
Standard Bill of Materials (at GA)
The base Cisco 1921 (CISCO1921/K9) ships as a 1U ISR G2 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 doublewide or two singlewide EHWIC/HWIC modules, 512 MB of soldered DDR2 DRAM (fixed, not upgradeable), 256 MB of internal embedded USB (eUSB) flash storage (fixed), embedded hardware-based IPsec/SSL cryptographic acceleration, a single external USB 2.0 Type-A port for token/storage, an RJ-45 serial console port, a USB mini-Type B console port, a serial auxiliary port, and an internal 60W AC power supply. The unit ships with Cisco IOS IP Base Universal image pre-installed and licensed; Security (SEC) and other technology package licenses are optional activations on the same image. Rack-mount ears are NOT included by default and must be ordered separately.
| Component | Description | Part # | Qty | Notes |
|---|---|---|---|---|
| Chassis / Base Unit | Cisco 1921 ISR G2, 1U, 2x onboard GE, 2x EHWIC slots, IP Base IOS, 60W AC PSU | CISCO1921/K9 |
1 | Fixed 512MB DRAM / 256MB eUSB flash; memory is not field-upgradeable |
| DRAM | 512 MB DDR2 SDRAM (soldered on motherboard) | — |
1 | Fixed; not upgradeable. Maximum and default are both 512 MB. |
| Flash Storage | 256 MB embedded USB (eUSB) internal flash | — |
1 | Fixed; not upgradeable. Holds Cisco IOS Universal image and CCP Express. |
| Power Supply | 60W internal AC power supply | PWR-1921-AC |
1 | Optional DC power supply variant available (CISCO1921DC/K9). PoE PSU (PWR-1921-POE) available for PoE-capable EHWIC modules. |
| IOS Software License | Cisco IOS IP Base Universal image license (pre-installed) | L-FL-1921-IP-BASE |
1 | SEC, UC, DATA technology package licenses activatable on same universal image via PAK |
| EHWIC Slot Blank Cover | Blank cover/faceplate for empty EHWIC slots | EHWIC-BLANK |
2 | Ships with blanks; replaced when EHWIC modules are installed |
| Rack-Mount Kit | 19-inch EIA rack-mount bracket kit (NOT included by default) | ACS-1900-RM-19 |
1 | Must be ordered separately; wall-mount also supported per installation guide |
| Console Cable | RJ-45 to DB-9 serial console cable | CAB-CONSOLE-RJ45 |
1 | USB mini-Type B console cable (CAB-CONSOLE-USB) also supported |
BOM reflects the standard base CISCO1921/K9 configuration at GA. The CISCO1921-SEC/K9 variant adds a pre-activated Security license PAK. CISCO1921DC/K9 substitutes a DC power supply. EHWIC, HWIC, VWIC3, and WIC expansion modules (T1/E1, DSL, serial, 4-port GE switch, 3G wireless, etc.) are customer-ordered options not included in the base BOM. Rack-mount ears are explicitly not included in the default accessory kit and must be ordered separately (ACS-1900-RM-19). Vendor part numbers for fixed/soldered components (DRAM, flash) are not publicly listed as separately orderable spares. Service-parts numbers may have been superseded; always cross-reference with the Cisco 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)M9