What is the Cisco MEM-C8500-16GB and How Does
Core Functionality: Memory Expansion for High-Den...
Core Functionality of the EPA-10X10GE
The EPA-10X10GE is a high-density Ethernet port adapter designed for Cisco’s ASR 1000 Series Aggregation Services Routers. This module provides 10x 10Gbps SFP+ ports optimized for service provider edge and enterprise WAN aggregation. Unlike standard line cards, it integrates Cisco Quantum Flow Processor (QFP) technology for hardware-accelerated packet processing, enabling wire-speed NAT, QoS, and IPsec VPN performance.
Key Technical Specifications
- Port Density: 10x SFP+ slots (10Gbps per port, hot-swappable)
- Forwarding Capacity: 40 Gbps bidirectional throughput
- Compatibility: ASR 1009-X, ASR 1006-X chassis with Supervisor Engine V-10GE
- Software Features:
- NetFlow v9 for granular traffic visibility
- Stateful Switchover (SSO) for sub-second failover
- MACsec-256 encryption (requires Cisco IOS XE 3.16+)
Platform Integration and Limitations
Supported Cisco Systems
| Platform | Minimum IOS Version | Use Case |
|---|---|---|
| ASR 1009-X | 15.5(3)S5 | Metro-E core routing |
| ASR 1006-X | 15.4(3)S9 | SD-WAN headend aggregation |
Critical Constraints:
- No support for ASR 1001-HX due to power budget limitations
- Shared buffer architecture limits concurrent QoS policies to 8,000 entries
Deployment Scenarios
1. Service Provider Edge Routing
The EPA-10X10GE handles MPLS VPN and BGP/OSPF table sizes up to 1.2 million routes, making it ideal for Tier-2 ISP peering points. For example, aggregating traffic from 50+ DSLAMs in a regional network.
2. Enterprise WAN Encryption
With Cisco ESP-100/200 integration, it achieves 18 Gbps IPsec throughput using AES-256-GCM, sufficient for hybrid cloud connectivity across 50+ branch sites.
3. NFV Service Chaining
Supports Cisco NFVIS to host virtual firewalls (ASAv) or WAN optimizers, leveraging its 16GB dedicated memory partition.
User Concerns Addressed
Q: Can it interoperate with third-party 10G SFP+ modules?
A: Yes, but only with Cisco Digital Optical Monitoring (DOM)-enabled optics. Non-Cisco SFPs trigger “unsupported transceiver” alerts.
Q: How does it handle buffer congestion with 10G line rate?
A: The shared 12MB packet buffer uses Dynamic Threshold Scaling, but sustained 90%+ utilization requires enabling Explicit Congestion Notification (ECN).
Q: Is redundant power required for SSO?
A: Yes. Dual 1400W AC/DC power supplies are mandatory for stateful failover during grid fluctuations.
Performance Comparison: EPA-10X10GE vs. SPA-1X10GE-L-V2
| Parameter | EPA-10X10GE | SPA-1X10GE-L-V2 |
|---|---|---|
| Max Throughput | 40 Gbps | 10 Gbps |
| IPsec Acceleration | Yes (QFP) | No |
| Port Density | 10x10G | 1x10G + 4x1G |
| Virtualization Support | NFVIS Containers | LXC Only |
Takeaway: The EPA-10X10GE outperforms older SPAs in encryption and scale but requires ASR 1000-series chassis.
Purchasing Considerations
While Cisco discontinued the EPA-10X10GE in 2024, certified refurbished units with 90-day warranties remain available. For verified inventory and compatibility checks, visit [“EPA-10X10GE=” link to (https://itmall.sale/product-category/cisco/).
Final Perspective: Balancing Legacy and Modern Needs
The EPA-10X10GE remains a workhorse for organizations with existing ASR 1000 investments, particularly for MPLS-based service providers needing cost-effective 10G density. However, its lack of Flexible NetFlow IPv6 support and 400G migration path makes it unsuitable for greenfield deployments. For enterprises prioritizing SD-WAN and Zero Trust, upgrading to Cisco’s Catalyst 9500 with Cisco Silicon One architecture offers better long-term ROI.