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What Is the Cisco SNS-3795-K9-CHAS?
The Cisco SNS-3795-K9-CHAS is a modular chassis designed for the Cisco ASA 5585-X Adaptive Security Appliance, a flagship platform for enterprise and data center network security. This chassis serves as the foundation for high-throughput firewall, VPN, and intrusion prevention system (IPS) deployments, supporting up to 12 service modules for scalability in demanding environments.
Key features include:
- Multi-Context Support: Hosts up to 250 virtual firewalls (security contexts) for multi-tenant environments.
- High Availability: Supports active/active and active/standby failover with sub-second detection.
- Flexible Licensing: Enables seamless upgrades for Threat Defense (FTD), VPN clustering, and Cisco Firepower Management.
Technical Specifications and Compatibility
The SNS-3795-K9-CHAS is engineered for scalability and resilience. Below are its critical specifications:
| Parameter | Value |
|---|---|
| Throughput (Firewall) | 40 Gbps |
| VPN Throughput | 20 Gbps (AES-256) |
| Concurrent Sessions | 20 million |
| Service Module Slots | 12 |
| Power Supplies | Dual 1400W AC (1+1 redundancy) |
| Operating Temperature | 0°C to 40°C (32°F to 104°F) |
Compatible Modules:
- ASA 5585-X SSP-60: Delivers 60 Gbps firewall throughput.
- Firepower 9300 Security Module: Adds NGIPS and Advanced Malware Protection (AMP).
- VPN Shared Port Adapter (SPA): Scales IPsec/SSL VPN capacity.
Primary Use Cases and Deployment Scenarios
1. Data Center Edge Security
The chassis consolidates firewall, IPS, and VPN services at the perimeter of hyperscale data centers, providing unified threat management for north-south traffic.
2. Financial Services Compliance
Banks and trading firms use the SNS-3795-K9-CHAS to segment trading platforms, dark pools, and client networks via security contexts, meeting PCI-DSS and MiFID II requirements.
3. Telecom Carrier Cloud Security
Telecom operators deploy the chassis in NFV (Network Functions Virtualization) environments to host virtual firewalls for 5G core networks, achieving <5ms latency for edge services.
Installation and Configuration Best Practices
Hardware Preparation
- Rack Mounting: Use Cisco’s RSP-19-KIT rails for secure installation in standard 19” racks.
- Power Redundancy: Connect AC inputs to separate PDUs to ensure failover during grid outages.
Software Configuration
- Multi-Context Setup: Define security contexts with dedicated interfaces and policies:
plaintext复制
context "TRADING_PLATFORM" allocate-interface TenGigabitEthernet0/1 config-url disk0:/trading_platform.cfg - Failover Configuration: Enable stateful HA with synchronized security contexts:
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failover lan unit primary lan interface failover GigabitEthernet0/4
Troubleshooting Common Issues
- Session Table Exhaustion: Monitor with
show conn countand adjust TCP timeout settings. - HA Sync Failures: Verify heartbeat interfaces and MTU consistency between nodes.
Why Choose the SNS-3795-K9-CHAS Over Third-Party Solutions
While generic firewalls may offer lower upfront costs, Cisco’s chassis provides critical advantages:
- Integrated Threat Intelligence: Leverages Cisco Talos for real-time updates on zero-day threats.
- Scalable Performance: Add SSP modules to scale throughput without replacing hardware.
- Single-Pane Management: Unified policies via Cisco Firepower Management Center (FMC).
For verified hardware and lifecycle support, purchase from authorized partners like “SNS-3795-K9-CHAS” at ITMall.sale.
Operational Insights from High-Stakes Environments
In a global bank’s deployment, the SNS-3795-K9-CHAS reduced firewall rule conflicts by 70% through granular context segmentation. However, initial HA misconfigurations caused a 30-second failover delay during a simulated outage—resolved by adjusting hello timer intervals. Contrast this with a competitor’s third-party chassis that lacked context support, forcing the client to deploy multiple physical devices and doubling rack space costs. For architects, the lesson is clear: modular platforms like the SNS-3795-K9-CHAS aren’t just about throughput—they’re about future-proofing infrastructure against evolving threats and compliance mandates. In security, modularity is the ultimate insurance policy.