Cisco S49EESK9-12254SG Ios Enterprise Services Ssh for Cat4900

Overview
The Cisco IOS Enterprise Services SSH for Catalyst 4900 (part number S49EESK9-12254SG) provides secure, encrypted remote access to Cisco Catalyst 4900 series switches. This software image enables network administrators to manage devices over a secure shell (SSH) connection, protecting credentials and configuration data from eavesdropping and unauthorized access. Designed for enterprise environments, the SSH service integrates seamlessly with existing Cisco IOS features and supports both IPv4 and IPv6 networking.

Key Features

• Secure encrypted remote login using SSH version 2
• Support for public key authentication and password authentication
• Compatibility with Cisco IOS security policies and AAA frameworks
• Integrated with Cisco TrustSec and other Cisco security services
• Low impact on CPU and memory resources for optimal performance
• Easy upgrade path from Telnet or earlier SSH implementations

Technical Specifications

• Supported platform: Cisco Catalyst 4900 series switches
• Software image size: approximately 12 MB
• Required IOS release: 12.2(54)SG or later
• CPU usage: less than 5 percent under typical load
• Memory usage: less than 10 MB of RAM
• Encryption algorithms: AES, 3DES, Blowfish
• Key length support: up to 4096 bits for RSA keys
• IPv4 and IPv6 address families supported

Applications
This SSH service is ideal for enterprises that need secure command line access to their switching infrastructure. It is commonly used in data centers, branch office networks, and campus environments where compliance with security standards such as PCI DSS, HIPAA, or ISO 27001 is required. Network engineers can use the encrypted session to perform configuration changes, firmware upgrades, and troubleshooting without exposing sensitive information to the network. The software also supports integration with centralized authentication systems like RADIUS and TACACS+ for streamlined user management across large deployments.