Cisco Catalyst 2948G L3 Ethernet Switch

The Cisco Catalyst 2948G is a high-performance, fixed-configuration Ethernet switch designed for enterprise environments, offering extensive Gigabit Ethernet connectivity. This switch is built to handle demanding network traffic and provide reliable performance for various business applications.

## Technical Specifications

### General
* **Product Type:** Ethernet Switch
* **Form Factor:** Rack-mountable (1U)
* **Dimensions (H x W x D):** 1.73 x 17.5 x 17 inches (4.39 x 44.5 x 43.1 cm)
* **Weight:** 13 lb (5.9 kg)

### Performance
* **Switching Fabric Capacity:** Up to 22 Gbps (non-blocking) for the 2948G-L3 model. The 2948G-GE-TX model shares 12 Gbps of capacity (or 6 Gbps full-duplex) into its switching fabric for the 48 autosensing 10/100/1000BASE-T ports, with the 4 SFP ports operating at wire-speed.
* **Forwarding Rate:** More than 10 Mpps (million packets per second) for Layer 3 switching on the 2948G-L3 model. The 48 10/100/1000BASE-T ports on the 2948G-GE-TX can burst to Gigabit Ethernet line rate.
* **MAC Address Table Size:** Not explicitly detailed in the provided documentation.
* **Jumbo Frame Support:** Not explicitly detailed in the provided documentation.

### Interfaces and Ports
* **2948G-L3 Model:**
* 48 x 10/100 Ethernet ports (RJ-45 connectors)
* 2 x Gigabit Ethernet uplink ports with GBIC (Gigabit Interface Converter) support
* **2948G-GE-TX Model:**
* 48 x autosensing 10/100/1000BASE-T ports (RJ-45)
* 4 x SFP (Small Form-Factor Pluggable) ports (also referred to as mini-GBIC)
* **Management Ports:**
* 1 x RJ-45 console port
* 1 x 100Base-TX RJ-45 management port

### Network Protocols and Standards
* **Ethernet:** IEEE 802.3, 10BaseT
* **Fast Ethernet:** IEEE 802.3u, 100BaseTX
* **Gigabit Ethernet:** IEEE 802.3z, IEEE 802.3x
* **1000BaseX:** Supports various GBIC modules including 1000BaseSX, 1000BaseLX/LH, and 1000BaseZX
* **VLAN Trunking/Tagging:** IEEE 802.1Q, Cisco Inter-Switch Link (ISL)
* **Spanning-Tree Protocol:** IEEE 802.1D, Per-VLAN Spanning Tree Plus (PVST+)
* **Flow Control:** IEEE 802.3x
* **Ethernet Cable Support:** Category 3, 4, or 5 unshielded twisted-pair (UTP) cabling for 10BaseT ports

### Layer 3 Capabilities (2948G-L3 Model)
* **Routing:** Supports wire-speed routing of IP, IPX, and IP Multicast traffic.
* **Switching:** True Layer 3 switching performed by port-based ASICs.
* **Cisco Express Forwarding (CEF):** Utilized for Layer 3 switching based on a network topology map, enabling autonomous switching decisions at each port ASIC.
* **Protocol Support:** Capable of Layer 3 switching for IP, IPX, and IP multicast, while also offering Layer 2 switching for non-routable protocols like NetBIOS and DECnet LAT.

### Quality of Service (QoS)
* Multiple queues with Weighted Round Robin (WRR) scheduling are supported.

### Management
* **SNMP:** Management Information Base (MIB) II support.
* **Remote Management Protocols:** SNMP v1, v2c, v3, Telnet, RMON.
* **CiscoWorks2000:** Supported for network management applications.
* **Other Management Features:** DHCP support, Auto-negotiation, Trunking, VLAN Support, IGMP Snooping, Intrusion Detection System (IDS).
* **Remote Switch Port Analyzer (RSPAN):** Allows remote monitoring of ports.
* **VTP (VLAN Trunking Protocol):** Supports dynamic VLANs and dynamic trunk configuration.
* **CLI:** Command-line interface support is available.

### Electrical and Power
* **Power Consumption:** 130W (maximum) for the 2948G-GE-TX model.
* **AC Input Voltage:** 100–240 VAC (autoranging), 50–60 Hz.
* **Redundant Power Supply (RPS):**
* Optional external redundant power supply support for the 2948G-L3 model.
* The 2948G-GE-TX model supports connection to the Cisco RPS 675 (model PWR675-AC-RPS-N1=) for redundant power, which can power one failed device at a time.
* 110 – 220 Volt AC power inputs with redundant power supply support.
* RPS input: +12V at 13A.

### Environmental
* **Operating Temperature:** 32 to 113°F (0 to 45°C).
* **Storage Temperature:** –13 to 158°F (–25 to 70°C).
* **Operating Relative Humidity:** 10 to 85 percent (noncondensing).
* **Operating Altitude:** Up to 10,000 ft (3049 m).
* **Storage Altitude:** Up to 15,000 ft (4573 m).
* **Acoustic Noise:** 42 decibels (dB) based on ISO 7779 bystander position at 30°C ambient.

### Physical Indicators
* Per-port status LEDs.
* System status LEDs (system, power, RPS).

### Compatibility
* Uses the same feature-rich Cisco Catalyst OS software as the Cisco Catalyst 2948G, Cisco Catalyst 2980G-A, and Cisco Catalyst 4000 Series switches.
* Supports GBIC modules for Gigabit Ethernet uplinks.
* Supports SFP modules for Gigabit Ethernet uplinks on the 2948G-GE-TX model.

### Miscellaneous
* **Year 2000 (Y2K) Compliant:** Yes.
* **Mean Time Between Failure (MTBF):** 146,280 hours.

Why Choose Aumictech for Cisco 2948G?
At Aumictech, we specialize in supplying high-end networking equipment. Whether you need to upgrade your core network infrastructure, enhance your data center connectivity, or implement robust desktop Gigabit Ethernet solutions, our team ensures the Cisco 2948G delivers maximum performance and reliability for your application.