ISR4321/K9

Q1: What software options are available for the Cisco ISR4321/K9?

A: The Cisco ISR4321/K9 uses a single Cisco IOS XE universal software image. This universal image includes all features and functionalities. Specific functions are enabled through Cisco Software Activation Licenses, streamlining software management across different network deployments.

Q2: What type of Cisco IOS software runs on the ISR4321/K9?

A: The ISR4321/K9 operates on Cisco IOS XE Software, consistent with Cisco's ASR 1000 series, ensuring feature-rich capabilities and ongoing updates.

Q3: Are the PoE interfaces on the ISR4321/K9 PoE+ capable?

A: Yes, PoE+ is supported on the SM-X Ethernet switch modules and FPGE ports, providing enhanced power capabilities for connected devices.

Q4: What type of power cables are used with the ISR4321/K9?

A: The ISR4321/K9 uses standard IEC C13 connectors for its power supplies, including PoE power supplies. No special cords are required, which simplifies installation.

Q5: What kind of backplane technology does the ISR4321/K9 use?

A: The ISR4321/K9 utilizes a multigigabit fabric (MGF) backplane, providing efficient, high-speed Layer 2 connectivity between modules.

Q6: Does the ISR4321/K9 support MDI crossover (MDI-X)?

A: Yes, MDI crossover (MDI-X) is supported on the ISR4321/K9’s onboard RJ-45 Ethernet interfaces, eliminating the need for crossover cables.

Q7: Do the ISR4321/K9’s front-panel Gigabit Ethernet ports support auto-failover?

A: Yes, auto-failover is supported on Gigabit Ethernet ports with both RJ-45 and SFP connections. If one connection type fails, the other becomes active seamlessly.

Q8: Can memory DIMMs of different sizes be used in the ISR4321/K9?

A: No, the ISR4321/K9 requires DIMMs of equal size for memory slots to function correctly due to memory interleaving.

Q9: How many DIMM slots does the ISR4321/K9 have?

A: The ISR4321/K9 router is equipped with one DIMM slot.

Q10: What memory upgrade options are available for the ISR4321/K9?

A: The ISR4321/K9 has 4 GB control-plane memory by default, upgradeable up to 16 GB depending on the platform. The 2 GB data-plane memory is fixed and currently not upgradeable.

Q11: What is the ISR4321/K9 router?

A: The ISR4321/K9 is a Cisco Integrated Services Router (ISR) designed for small to medium-sized businesses, providing secure, high-performance routing and application services for branch offices.

Q12: What connectivity options does the ISR4321/K9 support?

A: The ISR4321/K9 supports Ethernet, Wi-Fi, and cellular connectivity, ensuring flexible and reliable network access in diverse environments.

Q13: What security features does the ISR4321/K9 offer?

A: Security features on the ISR4321/K9 include firewall protection, VPN support, and intrusion prevention to safeguard network data and operations.

Q14: Which application services are supported by the ISR4321/K9?

A: The ISR4321/K9 supports advanced application services like Quality of Service (QoS), Network Address Translation (NAT), and integrated voice and video solutions.

Q15: Is the ISR4321/K9 easy to deploy and manage?

A: Yes, the ISR4321/K9 simplifies deployment and management with plug-and-play features, a user-friendly web interface, and remote management options for efficient administration.

Q16: How cost-effective is the ISR4321/K9?

A: The ISR4321/K9 offers an excellent balance of performance and features at a competitive price point, making it cost-effective for small to medium-sized businesses.

Q17: What are the main features of the ISR4321/K9?

A: The ISR4321/K9 includes a multi-core CPU, throughput of 50-100 Mbps, 2 WAN/LAN ports, 1 SFP port, and support for Security, Voice, WAAS, Intelligent WAN, OnePK, and AVC services.

Q18: What application scenarios are suitable for the ISR4321/K9?

A: The ISR4321/K9 is suitable for small to medium-sized enterprise branch offices requiring reliable routing, voice capabilities, and secure WAN connectivity.

Q19: How is the ISR4321/K9 installed?

A: Installation involves mounting the router, connecting WAN/LAN ports, and configuring the router via command-line or web interface following Cisco's setup instructions.

Q20: Does the ISR4321/K9 require regular software upgrades?

A: Regular firmware and software updates are recommended to maintain optimal performance, security enhancements, and new feature integrations.

Q21: Are there alternative routers to the ISR4321/K9?

A: Yes, alternatives include the Cisco ISR4331 for higher throughput requirements and the ISR4221 for more budget-conscious deployments with slightly reduced features.

Q22: What troubleshooting steps are common for the ISR4321/K9?

A: Common troubleshooting involves checking cable connections, verifying configurations, rebooting the router, and updating firmware as necessary.

Q23: What accessories are available for the ISR4321/K9?

A: Accessories include power supplies, rack-mounting brackets, additional NIM modules, and SFP modules for expanding connectivity options.

Q24: How does the ISR4321/K9 compare to similar Cisco routers?

A: The ISR4321/K9 offers a balanced combination of throughput, port density, and integrated features, positioning it between the ISR4221 and ISR4331 for SMB requirements.

Q25: Is the ISR4321/K9 compatible with older Cisco equipment?

A: Yes, the ISR4321/K9 maintains compatibility with older Cisco devices, ensuring smooth integration into existing network setups.