Cisco EHWIC-D-8ESG | 8-Port Gigabit Ethernet WAN Module

Cisco EHWIC-D-8ESG Technical Overview & Capabilities

The Cisco EHWIC-D-8ESG is a double-wide, high-density Enhanced High-Speed WAN Interface Card that integrates Gigabit Ethernet switching directly into Cisco Integrated Services Routers (ISR) G2. Featuring 8 Gigabit Ethernet ports, it allows small-to-medium branch offices in Pakistan to combine routing and switching into a single chassis. This “switch-on-a-card” solution reduces the need for external switches, saving valuable rack space and simplifying network management for enterprises in Karachi, Lahore, and beyond.

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Key Performance Highlights

• High-Speed Switching: Provides 8 ports of non-blocking, line-rate 10/100/1000 Gigabit Ethernet switching, ensuring high-speed data transfer between local networked devices.

• Double-Wide Form Factor: Utilizes two EHWIC slots on the router to accommodate the high port density, providing a robust hardware foundation for branch office LANs.

• Advanced Layer 2 Features: Supports standard switching features including VLANs (802.1Q), Spanning Tree Protocol (STP), and Port Security to ensure a secure and organized local network.

• Low Latency Architecture: Designed to handle bandwidth-intensive applications such as high-definition video streaming and large file transfers without causing bottlenecks at the branch level.

• Integrated Management: Managed directly through the Cisco IOS CLI, allowing network administrators to configure both routing and switching from a single management console.

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Technical Specifications

Feature	Details
Model	EHWIC-D-8ESG
Interface Type	Double-wide EHWIC
Total Ports	8 × 10/100/1000 Gigabit Ethernet
Switching Capacity	Line-rate Layer 2 switching
VLAN Support	Up to 255 VLANs per card
Jumbo Frames	Supported (up to 9000 bytes)
Compatible Routers	Cisco ISR G2 (1921, 1941, 2901, 2911, 2921, 2951, 3925, 3945)
Quality of Service	Support for 802.1p CoS and DSCP-based prioritization

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Business Advantages for the Pakistan Market

1. Space and Cost Efficiency

In many Pakistani branch offices where server room space is limited, the EHWIC-D-8ESG eliminates the need for an external 8-port switch. By integrating switching into the router, businesses save on the cost of extra hardware, cabling, and separate power outlets.

2. Simplified Maintenance

For IT teams managing multiple sites across Pakistan, having fewer devices means fewer failure points. Monitoring and troubleshooting the branch LAN becomes easier when the switch ports are visible within the router’s operating system.

3. Professional Grade Security

Unlike consumer-grade switches, this module supports 802.1X authentication and Port Security. This is vital for banks and corporate offices in Pakistan that need to prevent unauthorized devices from accessing the internal network.

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Deployment Scenarios

• Branch Office Consolidation: Acting as the primary LAN switch for a small team of 5–8 users, connecting PCs, printers, and NAS devices.

• IP Surveillance Integration: Connecting and segmenting high-definition IP cameras onto a dedicated VLAN within the branch.

• Secure Retail Outlets: Powering the backend of retail stores by connecting POS terminals and inventory scanners directly to the secure branch router.

• Temporary Project Sites: Providing a quick, all-in-one networking solution for construction or engineering sites that require high-speed local data sharing.

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Related FAQs

1. Does the EHWIC-D-8ESG support Power over Ethernet (PoE)?

No, the EHWIC-D-8ESG is a data-only Gigabit switch module. If you require PoE to power IP phones or cameras, you should consider the EHWIC-4ESG-P or the EHWIC-D-8ESG-P (PoE-enabled) versions.

2. Can I install this card in a single EHWIC slot?

No. This is a double-wide module, meaning it physically occupies the space of two side-by-side EHWIC slots on the router’s backplane.

3. Does it support Gigabit speeds on all 8 ports simultaneously?

Yes. The card provides non-blocking, line-rate performance, meaning all 8 ports can operate at full Gigabit speeds for local traffic without interfering with each other.

4. Is this module compatible with Cisco 4000 Series ISRs?

No. The EHWIC architecture is designed for the Cisco ISR G2 series. The 4000 Series (NIM slots) requires a different module type for integrated switching.

5. Can I configure VLANs specifically for these ports?

Absolutely. You can create multiple VLANs in the router’s database and assign each of the 8 ports to a specific VLAN, just as you would on a standalone Catalyst switch.