Cisco 900 Series ISR C921-4P Gigabit Ethernet Router (2 WAN + 4 LAN) - CISCO
SKU: C921-4PCisco › Cisco Routers & Access Points
฿23,735
Price includes 7% VATPrice updated November 1, 2026
In stock5 unitsManufacturer's warranty
For orders placed before 12:00 on a business day; weekends excluded
GenuineFree delivery from ฿5,000Tax invoice
Cisco 900 Series C921-4P router supports 2 WAN ports and 4 LAN ports with a managed switch, enabling efficient operation in small offices or data centers
Key features
- Supports 2 Gigabit Ethernet WAN ports with automatic failover
- 4-port managed LAN switch
- High-speed IPsec encryption support using AES and 3DES
- Threat protection with integrated intrusion prevention and firewall
- Network management via console port and central management console
Product description
The Cisco 900 Series ISR C921-4P is an integrated service router designed for highly stable and secure network operations. It supports 2 Gigabit Ethernet WAN ports with automatic failover via VRRP, HSRP, and MHSRP protocols to prevent network failure. This router can simultaneously run multiple services without performance degradation, such as firewall management, high-speed IPsec encryption using AES and 3DES, and intrusion prevention using hardware-accelerated security processing. The router includes a 4-port LAN switch that is manageable, supporting connections to multiple devices such as laptops, IP phones, or Access Points. It can be configured via console port or central management console for convenient setup, and supports remote management to reduce IT workload in branch offices.
More features
- Supports firmware and license updates via CLI
- Suitable for use in branch offices and small data centers
- Supports remote management to reduce IT team workload
- Has a USB 2.0 port for accessories
- Supports integration with IP Mobility systems
Pros and limitations
Pros
- Supports multi-protocol failover for high stability.
- Includes comprehensive security features built-in.
- Network management is possible from a central location and remotely.
- Supports IP Mobility operation after license activation.
- Features a USB 2.0 port and console port for initial configuration.
Limitations
- Flash memory cannot be upgraded.
- No weight or dimensions provided in metric units.
- Additional license configuration is required to use advanced features.
Who it is for
Ideal for branch offices or small data centers requiring a high-security router with failover support and centralized network management.
Specifications (23)
- Brand
- CISCO
- Model
- C921-4P
- Series
- 900 Series Integrated Services Routers (ISR)
- Console Port
- Yes
- Default DRAM
- 1 GB
- Certifications
- CE, FCC, RoHS
- LAN Interfaces
- 4-port GE managed switch
- LED Indicators
- VPN LED
- WAN Interfaces
- 2 ports Gigabit Ethernet (GE)
- Power Supply Type
- Internal power supply
- Security Features
- Integrated application inspection firewall, IPsec encryption (AES, 3DES), intrusion prevention, security hardware accelerator
- Integrated USB 2.0
- Yes
- IP Mobility Support
- Yes (after license activation)
- License Requirements
- license boot module c900 technology-package appxk9
- Management Interface
- Web-based tools, CLI, Cisco IOS® Software
- Maximum Flash Memory
- 2 GB
- LED Status Indicators
- Power, Reset, VPN
- Dimensions (H x W x D)
- 1.70 x 9.0 x 9.5 in. (4.32 x 22.86 x 24.13 cm)
- Firmware Upgrade Capability
- Yes
- Wireless Management Support
- Yes, unified control of wired and wireless networks from a common console
- Failover Protocols Supported
- Virtual Router Redundancy Protocol (VRRP), Hot Standby Router Protocol (HSRP), Multigroup HSRP (MHSRP)
- Remote Configuration & Management
- Yes
- Maximum Crypto Throughput (bit-rate policed)
- 250 Mbps
Datasheets and manuals straight from the manufacturer — select a document to open or download it.
13 questions
Frequently asked questions about this product
Compiled from manufacturer information
Does C921-4P support LTE connectivity?
Not supported directly. LTE-capable models include C921-4PLTEGB, C921-4PLTEAU, or C921-4PLTEAS, which feature additional LTE slots. C921-4P is Ethernet-only
How do I configure the license to enable IP Mobility?
To enable IP Mobility, enter the following CLI commands: `license right-to-use move appxk9` and `license boot module c900 technology-package appxk9`, then restart the device
How many LAN ports does C921-4P have, and is it manageable?
It has 4 Gigabit Ethernet LAN ports and is manageable via a managed switch, supporting VLAN, QoS, and port status monitoring
Can this router connect to the internet via LAN cable?
Yes, you can connect the two WAN ports to an ISP or main switch and configure failover or load balancing using VRRP or HSRP protocols
Can firmware be updated?
Yes, firmware updates can be performed via console port or web interface. Although flash memory cannot be upgraded, full firmware update support is available
What devices can be connected via the USB port?
It has a USB 2.0 port that can connect peripherals such as USB modems, flash drives, or remote management devices, but it does not support use as a primary storage device
What cable is needed for initial setup?
A console cable (e.g., RJ-45 to DB9) is required to connect to a computer, then use a terminal program such as PuTTY or Tera Term to access the CLI for initial setup.
Does this router support rack mounting?
No information specifies direct rack mounting support, but the device size (24.13 cm wide) may not be suitable for narrow racks. It is recommended to place it on a desk or wall instead.
Is it in stock?
The Cisco 900 Series ISR C921-4P Gigabit Ethernet Router (2 WAN + 4 LAN) - CISCO is in stock and ready to ship. Orders placed before 12:00 on a business day are delivered within 1–3 business days (Bangkok and vicinity) or 2–5 business days (other provinces). Order online at store.gist.co.th or contact our sales team at 092-251-4017.
How much does it cost?
The price is ฿23,735 (including 7% VAT). It is in stock and ready to ship. Business customers can request a quotation at sales@gist.co.th.
How long is the warranty?
The warranty follows the manufacturer's terms for each model; ask our sales team for the warranty period of this model. To make a warranty claim, call 092-251-4017 or 065-523-5262, or email sales@gist.co.th (Mon–Fri 9:00–18:00), then send the product with your order number to our head office, or bring it to the head office in person.
How long does delivery take?
Orders placed before 12:00 on a business day are delivered within 1–3 business days (Bangkok and vicinity) or 2–5 business days (other provinces). Free delivery on orders of ฿5,000 or more (a ฿150 delivery fee applies below this amount).
Is it genuine?
Genuine products sourced from distributors in Thailand, covered by the manufacturer's warranty. Full tax invoices are available.
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Genuine products
Sourced from distributors in Thailand and covered by the manufacturer's warranty
Warranty period
According to the manufacturer's terms for each model
Covered by the manufacturer's warranty; you can make claims through GIST
Claims through GIST
Ship the product to our head office or bring it in person
Warranty conditions
- A receipt or other proof of purchase is required
- The product must not have been modified or altered
- Damage caused by misuse is not covered by the warranty
- To make a warranty claim, call 092-251-4017 or 065-523-5262, or email sales@gist.co.th (Mon–Fri 9:00–18:00), then send the product with your order number to our head office, or bring it to the head office in person.Head office: 554 Sky Nine Center, Floor 12A, Room 554/62, Asok-Din Daeng Road, Din Daeng Subdistrict, Din Daeng District, Bangkok 10400
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