Description
The Cisco ISR4431-VK9 is a high-performance Integrated Services Router from the ISR 4000 Series, designed to deliver secure, reliable, and scalable networking for medium to large branch offices. Built with a modular architecture, the ISR4431-VK9 supports a wide range of connectivity options and services, including WAN, LAN, voice, and security. Its compact 1RU form factor houses dual multicore processors, enabling intelligent service delivery without compromising performance. The unit includes integrated Gigabit Ethernet ports and supports up to two Network Interface Modules (NIMs) and one Enhanced Service Module (SM-X), offering flexibility for future expansion.
This model features built-in hardware acceleration for encryption and supports Cisco’s Unified Communications capabilities, making it suitable for converged voice and data networks. It includes an IP Base license with Voice (VK9), providing support for voice gateway functionality and advanced telephony features. With dual power supply options and redundant fan trays, the ISR4431-VK9 is built for high availability and long-term reliability in demanding environments. Buyers of used units should expect a robust platform capable of handling complex routing tasks, with performance scaling up to 500 Mbps with the appropriate license upgrades.