Cisco 4321 Integrated Services Router

Series Cisco 4000 Series Integrated Services Routers
Overview Product Overview
Product Type Branch Routers
Status End of Sale EOL Details
Release Date 30-SEP-2014
End-of-Sale Date 07-NOV-2023
End-of-Support Date 30-NOV-2028
Product ID

Primary PIDs for this product line:

  • C1-CISCO4321/K9
  • C1-CISCO4321T-P/K9
  • C1-CISCO4331T-P/K9
  • C1-CISCO4351T-P/K9
  • C1-SDWAN-ADD-ATO
  • ISR4321-AX/K9
  • ISR4321-AX/K9-RF
  • ISR4321-AX/K9-WS
  • ISR4321-AXV/K9
  • ISR4321-AXV/K9-RF
  • ISR4321-AXV/K9-WS
  • ISR4321-B/K9
  • ISR4321-DNA
  • ISR4321-PM20
  • ISR4321-SEC/K9
  • ISR4321-SEC/K9-RF
  • ISR4321-SEC/K9-WS
  • ISR4321-V/K9
  • ISR4321-V/K9-RF
  • ISR4321-V/K9-WS
  • ISR4321-VSEC/K9
  • ISR4321-VSEC/K9-RF
  • ISR4321-VSEC/K9-WS
  • ISR4321/K9
  • ISR4321/K9++
  • ISR4321/K9-RF
  • ISR4321/K9-WS
  • ISR4321BR-V/K9
  • ISR4321BR/K9
  • ISR4321R-AX/K9
  • ISR4321R-AXV/K9
  • ISR4321R-SEC/K9
  • ISR4321R-V/K9
  • ISR4321R-VSEC/K9
  • ISR4321R/K9
  • ISR4321R/K9-PK
  • ISR4331/K9-RF
  • ISR4331/K9-WS
  • SI-ISR4321-IWAN/K9
  • SPIAD4321

Alternate PIDs for this product line:

  • ACCY-ISR4321R-PK
  • ACS-4320-BEZEL-RF
  • ACS-4320-BEZEL=
  • ACS-4320-PSU-RM
  • ACS-4320-PSU-RM=
  • ACS-4320-RM-19-RF
  • ACS-4320-RM-19=
  • ACS-4330-RM-19-RF
  • ACS-4330-RM-19=
  • BE4SBR-PWR
  • C1-4320-PERF-K9
  • C1-4320-PERF1-K9
  • C1A2UISR4320SK9
  • C1A2UISR4320SK9=
  • C1AUAISR4320SK9=
  • C1AURISR4320S
  • C1F1AISR4320SK9
  • C1F1AISR4320SK9=
  • C1F2UISR4320SK9
  • C1F2UISR4320SK9=
  • FL-4320-HSEC-K9
  • FL-4320-HSEC-K9=
  • FL-4320-PERF-K9
  • FL-4320-PERF-K9=
  • ISR4320U-MEM-MSATA
  • ISR4321-B/K9-WS
  • ISR4321-DNA-WS
  • ISR4321R-ACCY-PK
  • ISR4321R-PKG-PK
  • L-FL-4320-HSEC-K9
  • L-FL-4320-HSEC-K9=
  • L-SL-4320-SEC-K9=
  • LL-EAR-4321=
  • MEM-4300-2G-RF
  • MEM-4300-2G=
  • MEM-4300-8G
  • MEM-4300-8G-RF
  • MEM-4300-8G=
  • MEM-4300-8GU16G
  • MEM-4300-8GU16G-RF
  • MEM-4300-8GU16G=
  • MEM-4320-4G
  • MEM-4320-4GU8G
  • MEM-4320-4GU8G-RF
  • MEM-FLSH-4G=
  • MEM-FLSH-4GU16G
  • MEM-FLSH-4GU8G
  • MEM-FLSH-8G-RF
  • MEM-FLSH-8G=
  • NIM-1MFT-T1/E1
  • NIM-1MFT-T1/E1++=
  • NIM-1MFT-T1/E1-RF
  • NIM-1MFT-T1/E1-WS
  • NIM-1MFT-T1/E1=
  • NIM-24A
  • NIM-24A-RF
  • NIM-24A-WS
  • NIM-24A=
  • NIM-2BRI-NT/TE
  • NIM-2BRI-NT/TE-RF
  • NIM-2BRI-NT/TE-WS
  • NIM-2BRI-NT/TE=
  • NIM-2CE1T1-PRI
  • NIM-2CE1T1-PRI-RF
  • NIM-2CE1T1-PRI-WS
  • NIM-2CE1T1-PRI=
  • NIM-2FXO
  • NIM-2FXO-RF
  • NIM-2FXO-WS
  • NIM-2FXO=
  • NIM-2FXS
  • NIM-2FXS-RF
  • NIM-2FXS-WS
  • NIM-2FXS/4FXO
  • NIM-2FXS/4FXO-RF
  • NIM-2FXS/4FXO-WS
  • NIM-2FXS/4FXO=
  • NIM-2FXS=
  • NIM-2MFT-T1/E1
  • NIM-2MFT-T1/E1++=
  • NIM-2MFT-T1/E1-RF
  • NIM-2MFT-T1/E1-WS
  • NIM-2MFT-T1/E1=
  • NIM-4BRI-NT/TE
  • NIM-4BRI-NT/TE-RF
  • NIM-4BRI-NT/TE-WS
  • NIM-4BRI-NT/TE=
  • NIM-4E/M
  • NIM-4E/M-RF
  • NIM-4E/M-WS
  • NIM-4E/M=
  • NIM-4FXO
  • NIM-4FXO-RF
  • NIM-4FXO-WS
  • NIM-4FXO=
  • NIM-4FXS
  • NIM-4FXS-RF
  • NIM-4FXS-WS
  • NIM-4FXS=
  • NIM-4G-LTE-GA
  • NIM-4G-LTE-GA-RF
  • NIM-4G-LTE-GA-WS
  • NIM-4G-LTE-GA=
  • NIM-4MFT-T1/E1
  • NIM-4MFT-T1/E1++=
  • NIM-4MFT-T1/E1-RF
  • NIM-4MFT-T1/E1-WS
  • NIM-4MFT-T1/E1=
  • NIM-8MFT-T1/E1
  • NIM-8MFT-T1/E1++=
  • NIM-8MFT-T1/E1-RF
  • NIM-8MFT-T1/E1-WS
  • NIM-8MFT-T1/E1=
  • NIM-ES2-4
  • NIM-ES2-4-RF
  • NIM-ES2-4-WS
  • NIM-ES2-4=
  • NIM-LTEA-EA
  • NIM-LTEA-EA-RF
  • NIM-LTEA-EA-WS
  • NIM-LTEA-EA=
  • NIM-LTEA-EAPRM
  • NIM-LTEA-LA
  • NIM-LTEA-LA-WS
  • NIM-LTEA-LA=
  • NIM-LTEA-LAPRM
  • NIM-PVDM-128
  • NIM-PVDM-128-WS
  • NIM-PVDM-128=
  • NIM-PVDM-256
  • NIM-PVDM-256-RF
  • NIM-PVDM-256-WS
  • NIM-PVDM-256=
  • NIM-PVDM-32
  • NIM-PVDM-32-RF
  • NIM-PVDM-32-WS
  • NIM-PVDM-32=
  • NIM-PVDM-64
  • NIM-PVDM-64-RF
  • NIM-PVDM-64-WS
  • NIM-PVDM-64=
  • NIM-SSD
  • NIM-SSD-RF
  • NIM-SSD-WS
  • NIM-SSD=
  • NIM-VA-B
  • NIM-VA-B-RF
  • NIM-VA-B-WS
  • NIM-VA-B=
  • NIM-VAB-A
  • NIM-VAB-A-RF
  • NIM-VAB-A-WS
  • NIM-VAB-A=
  • NIM-VAB-M
  • NIM-VAB-M-RF
  • NIM-VAB-M-WS
  • NIM-VAB-M=
  • NIM-X-SSD
  • NIM-X-SSD=
  • NIMASYNC-BRA
  • NIMASYNC-BRA=
  • PKG-ISR4321R-PK
  • PVDM4-128
  • PVDM4-128++=
  • PVDM4-128-RF
  • PVDM4-128-WS
  • PVDM4-128=
  • PVDM4-256
  • PVDM4-256++=
  • PVDM4-256-RF
  • PVDM4-256-WS
  • PVDM4-256=
  • PVDM4-32
  • PVDM4-32++=
  • PVDM4-32-RF
  • PVDM4-32-WS
  • PVDM4-32=
  • PVDM4-64
  • PVDM4-64++=
  • PVDM4-64-RF
  • PVDM4-64-WS
  • PVDM4-64=
  • PWR-4320-AC
  • PWR-4320-AC-RF
  • PWR-4320-AC-WS
  • PWR-4320-AC=
  • PWR-4320-POE-AC
  • PWR-4320-POE-AC-RF
  • PWR-4320-POE-AC-WS
  • PWR-4320-POE-AC=
  • PWR-4320BR-AC
  • PWR-4320BR-AC=
  • SM-X-16FXS/2FXO
  • SM-X-16FXS/2FXO-RF
  • SM-X-16FXS/2FXO-WS
  • SM-X-16FXS/2FXO=
  • SM-X-24FXS/4FXO
  • SM-X-24FXS/4FXO-WS
  • SM-X-24FXS/4FXO=
  • SM-X-72FXS
  • SM-X-72FXS-RF
  • SM-X-72FXS-WS
  • SM-X-72FXS=
  • SM-X-8FXS/12FXO
  • SM-X-8FXS/12FXO-RF
  • SM-X-8FXS/12FXO-WS
  • SM-X-8FXS/12FXO=
  • SM-X-NIM-ADPTR
  • SM-X-NIM-ADPTR++=
  • SM-X-NIM-ADPTR-RF
  • SM-X-NIM-ADPTR-WS
  • SM-X-NIM-ADPTR=
  • SM-X-PVDM-1000
  • SM-X-PVDM-1000-RF
  • SM-X-PVDM-1000=
  • SM-X-PVDM-500
  • SM-X-PVDM-500-RF
  • SM-X-PVDM-500=
  • SP-NIM-1T1E1
  • SP-NIM-2T1E1
  • SP-NIM-4T1E1
  • SSD-MSATA-400G
  • SSD-MSATA-400G=
  • SSD-MSATA-50G
  • SSD-MSATA-50G=
  • WS-X45-SUP8-E-RF
  • WS-X45-SUP8-E-WS
Visio Stencil (5 MB .zip file)
This product is supported by Cisco, but is no longer being sold.
Routers-4321-ISR_frnt_rt-1000.jpg

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Network interface modules (NIM)
2
Maximum switched Ethernet LAN ports with PoE
N/A
EtherSwitch Service Module type (width)
N/A
PoE support (wattage) without PoE boost
120 W
Intrusion prevention
Yes
Cisco Cloud Web Security
Yes
Form factor
1 rack unit (RU), desktop
SSL VPN
No
Module online insertion and removal (OIR)
Yes
Power supply type
External: AC, PoE
Maximum switched Ethernet ports
N/A
Hardware VPN acceleration (DES, 3DES, AES)
No
Redundant power supply
No
Management port
1 GE (Integated Out of Band)
PoE support (wattage) with PoE boost
260 W
Integrated Services Card (ISC) slots
1 (PVDM 4)
Server virtualization platform (UCS E-Series)
N/A
Enhanced Services Module (SM-X)
N/A
Identity-based networking
No
Zone-based fiewall and NAT services
VRF-Aware Firewall and Network Address Translation (NAT)
USB Ports (type A)
1
Integrated WAN ports
1 GE / SFP 1 GE
Default/max DRAM
4 GB / 8 GB
Default/max Flash
4 GB / 8 GB
Performance
50 Mbps Upgradeable to 100 Mbps