United States
Q
What is the Cisco ISR 3900 Series Router and why is it suitable for enterprise networks?
A
The Cisco ISR 3900 Series Router is an integrated services platform delivering high-performance routing, security, and application services in a modular design. It offers scalability, advanced security, and service modules ideal for enterprise branch and WAN-edge deployments.
Q
What performance throughput can I expect from the Cisco ISR 3925?
A
The Cisco ISR 3925 delivers up to 50 Mbps of base forwarding performance and up to 100 Mbps with an enhanced performance license; it scales up to 2 Gbps cumulatively with Performance on Demand. This flexibility supports medium-sized branch offices with encryption and application services.
Q
Which security features are integrated into the Cisco ISR 3900 Series?
A
It integrates Cisco Advanced Firewall, Intrusion Prevention System (IPS), IPsec VPN, URL filtering, and Cisco Umbrella malware defense. These services provide multi-layer security without sacrificing throughput.
Q
How scalable is the Cisco ISR 3900 Series Router?
A
The ISR 3900 Series supports up to four NIMs and two Service Modules, with Performance on Demand to unlock higher throughput tiers. This modular architecture enables seamless scalability as network demands grow.
Q
What interface and network modules does the ISR 3900 Series support?
A
Supports Cisco NIM, SM, SM-X, and EHWIC modules, offering Gigabit Ethernet, T1/E1, Serial, Fiber, and PoE options. This broad module ecosystem addresses diverse connectivity requirements.
Q
How does Performance on Demand licensing work on the ISR 3900?
A
Performance on Demand uses license activation keys to unlock incremental throughput tiers without hardware changes. You can scale performance from base levels to higher bandwidth as business needs evolve.
Q
Can the ISR 3900 Series support virtualized network functions?
A
Powered by Cisco IOS XE and Cisco NFV Infrastructure, the ISR 3900 can host virtual network functions like virtual routers, firewalls, and WAN optimizers. This reduces physical hardware and accelerates service deployment.
Q
What power options are available for the Cisco ISR 3900 Series?
A
Offers AC, DC, and redundant power supply options, including hot-swappable PSU support via Cisco RPS 2300. This ensures continuous operation and simplifies maintenance in mission-critical environments.
Q
How energy-efficient is the Cisco ISR 3900 Series?
A
With Cisco EnergyWise and variable-speed fans, the ISR 3900 dynamically adjusts power consumption to match workloads. This drives operational cost savings and lowers environmental impact.
Q
How do I configure IPsec VPN on a Cisco ISR 3900 router?
A
To configure IPsec VPN, define ISAKMP policies, create transform sets, configure crypto maps and ACLs, then apply to interfaces via CLI. Cisco’s configuration guides provide detailed command references.
Q
What warranty and support options are available for the Cisco ISR 3900?
A
Includes a limited lifetime hardware warranty and optional Smart Net Total Care for 24/7 technical support, software updates, and advanced replacement. This maximizes network uptime and protects your investment.
Q
Can I manage the Cisco ISR 3900 Series using Cisco DNA Center?
A
Fully compatible with Cisco DNA Center for centralized policy, automation, and analytics; supports NetFlow, SNMP, and REST APIs. This integration streamlines orchestration and lifecycle management.
Q
What is the process to upgrade the IOS XE software on an ISR 3900?
A
Download the IOS XE image from Cisco, transfer it via TFTP or USB, verify with MD5, copy to flash, set the boot variable, and reload. Always backup configurations and review release notes prior to upgrade.
Q
What are common use cases for the Cisco ISR 3900 Series Routers?
A
Ideal for branch routing, WAN aggregation, secure remote access, application hosting, and SD-WAN edge deployments. It converges multiple services to simplify operations and reduce total cost of ownership.
Q
How does the ISR 3900 Series ensure high availability?
A
Supports redundant power supplies, Cisco RPS, HSRP, VRRP, and Stateful Switchover in dual-chassis deployments. These capabilities ensure high availability and minimal downtime.
Q
What are the ordering considerations and pricing factors for the Cisco ISR 3900?
A
Ordering factors include chassis model (ISR 3925/3945/3945E), performance license tier, module choices, power options, and service contracts. Tailoring these selections optimizes cost efficiency and ROI.
