Cisco Catalyst WS-C4948-10GE Full English Product Description

1. Short Sales Title

2. Official Product Overview

1. Dedicated native 10GE X2 uplink ports (2 slots) instead of 4×1G SFP combo ports, supporting 10 Gigabit fiber backbone trunks to campus core or data center aggregation switchesCisco.
2. Upgraded 136 Gbps switching fabric and 102 Mpps forwarding rate for higher throughput with 10GE uplinksCisco.
3. Faster 666 MHz CPU and expanded memory to handle high-volume 10GE traffic and larger routing tablesCisco.
4. Side-to-side airflow (non-data-center optimized; front-to-back airflow only available on later WS-C4948E models).

Model Suffix Breakdown

• WS-C: Cisco Catalyst LAN Switch Platform Identifier
• 4948: Catalyst 4900 fixed server switch series, 48 copper downlink ports
• 10GE: Equipped with two dedicated X2-based 10 Gigabit Ethernet uplink slots (core differentiator from WS-C4948 with only 1G combo uplinks)

Front Panel Port Layout

1. 48 × 10/100/1000BASE-T RJ45 auto-sensing copper downlink ports for servers, virtualization hosts, workstations and IP phones
2. 2 × dedicated X2 10GE uplink slots for long/short reach 10G fiber backbone interconnections (X2 transceivers sold separately; no combo copper/SFP functionality)
3. Out-of-band management interfaces:
   • RJ45 RS232 serial console port
   • 10/100BASE-T dedicated isolated out-of-band Ethernet management port
4. Front LED array: System, power, fan, port link/activity, fault, UID beacon diagnostic indicators

Rear Compartment Layout

1. Dual independent hot-swappable power supply bays supporting 1+1 N+1 power redundancy
2. Integrated single hot-swappable variable-speed fan tray with multiple redundant fans
3. Airflow: Side-to-side (intake left, exhaust right; incompatible with standard hot/cold aisle data center rack design)

Supported Transceivers & Power Options

1. 10GE uplink transceivers: Cisco X2-10GB-SR/LR/ER/ZR optical modules
2. Power supplies: AC 1100W hot-swap PSU, DC 1100W telecom negative power PSU
3. No PoE support; designed exclusively for server rack data aggregation

3. Hardware & Physical Specifications

Core Switching Performance

• Total non-blocking switching fabric capacity: 136 Gbps full-duplex
• Wire-speed forwarding rate: 102 Mpps for Layer 2 bridging and hardware CEF IPv4 routing
• Shared packet buffer memory: 16 MB dynamic shared buffer across all ports (upgraded from 8MB on WS-C4948)
• Main CPU: 666 MHz processor (higher performance than 266 MHz CPU on base WS-C4948)
• System memory: 256 MB SDRAM, 128 MB internal flash storage
• MAC address table capacity: 55,000 MAC entries
• IPv4 routing table: 64,000 CEF routes; limited software-only IPv6 forwarding (full hardware IPv6 requires E-series WS-C4948E)
• TCAM ACL/QoS/security entries: 64,000 concurrent flow entries
• Maximum VLANs: 4094 standard 802.1Q tagged VLANs
• SVI routed interfaces: Up to 4094 inter-VLAN routed interfaces
• Jumbo frame support: Up to 9198 bytes MTU for bridged and routed traffic
• Maximum EtherChannel bundles: 8 ports per Gigabit EtherChannel (GEC); 2-port 10GE EtherChannel supported on uplinks

Power & Cooling System

• Power supply bays: 2 hot-swappable redundant slots for 1+1 power failover
• AC input range: 100–240V 50/60Hz; DC –48V telecom negative power
• Fan tray: Integrated multi-fan variable-speed hot-swappable assembly; single fan failure triggers SNMP alert without traffic outage
• Airflow direction: Side-to-side left intake, right exhaust (non-data-center optimized)
• Real-time monitoring: Fan speed, internal temperature, PSU voltage and fault logging via console and SNMP traps

Physical & Environmental Parameters

• Rack form factor: 1 RU standard 19-inch rack mount
• Dimensions (H × W × D): 4.45 cm × 43.2 cm × 40.6 cm (1.75 × 17.0 × 16.0 inches)
• Weight: 13.6 kg (30 lbs) bare chassis without power supplies; fully loaded max weight 17.2 kg (38 lbs) with dual PSUs installed
• Operating temperature: 0°C to 40°C (32°F–104°F); altitude up to 3000 meters
• Storage temperature: -40°C to 75°C (-40°F–167°F)
• Relative humidity: 10%–90% non-condensing
• Compliance Certifications: FCC Class A, UL 60950-1, CE, VCCI Class A, NEBS Level 3, RoHS compliant

4. Full Layer 2 & Layer 3 IOS Feature Set (Cisco IOS 12.2(25)EWA)

Layer 2 Switching Features

• IEEE 802.1D STP, 802.1w Rapid STP, 802.1s MSTP
• 802.1Q trunking + ISL proprietary trunk encapsulation, DTP dynamic trunk negotiation
• VTP v1/v2/v3 VLAN Trunking Protocol, private VLAN host isolation
• Port security, static/dynamic secure MAC address learning, MAC filtering
• 802.3ad LACP EtherChannel link aggregation (max 8 ports per bundle)
• Broadcast/multicast/unicast storm suppression
• IGMPv1/v2/v3 snooping, CGMP for IPTV and video multicast optimization
• Voice VLAN auto-detection for Cisco IP phone uplink aggregation
• Local SPAN, RSPAN remote traffic mirroring for monitoring
• 802.3x full-duplex flow control

Layer 3 Routing & Multicast Features

• Static IPv4 routing, RIP v1/v2, full multi-area OSPFv2, EIGRP, BGPv4
• Wire-speed hardware SVI inter-VLAN routing via CEF
• Limited software-only IPv6 forwarding (no hardware IPv6 acceleration; exclusive to E-series hardware)
• PIM-DM / PIM-SM multicast routing, MSDP support
• ECMP equal-cost multi-path load balancing across multiple uplinks
• Policy-Based Routing (PBR) available with Enterprise Services IOS license
• Basic VRF-Lite multi-tenancy segmentation

Advanced MQC QoS & Traffic Prioritization

• Hierarchical MQC modular QoS policy framework
• 8 hardware priority queues per physical port, bidirectional 802.1p CoS / DSCP mapping
• Ingress traffic policing, egress shaping, packet marking and remarking
• Pre-built Auto-QoS templates optimized for VoIP, video conferencing and IP surveillance traffic prioritization

Enterprise Security Suite

• IEEE 802.1X port-based NAC authentication with RADIUS/TACACS+ AAA identity integration
• DHCP Snooping, Dynamic ARP Inspection (DAI), IP Source Guard anti-spoofing protection
• Hardware-accelerated Port ACL, VLAN ACL (VACL) traffic filtering
• SSHv2 encrypted CLI management, SNMPv3 secure monitoring, encrypted startup-config files
• Control Plane Policing (CoPP) to protect supervisor CPU from DDoS attacks
• Rogue AP detection, private VLAN host isolation

Monitoring & Management

• Basic NetFlow v9 limited flow export (enhanced Flexible NetFlow exclusive to E-series WS-C4948E)
• Dedicated out-of-band Ethernet management port for isolated device access
• Cisco Discovery Protocol (CDP) for neighbor device discovery
• Smart Install zero-touch mass switch provisioning
• Cisco EnergyWise power efficiency monitoring for idle port power reduction

5. High Availability Capabilities

1. Dual hot-swappable redundant AC/DC power supplies (1+1 power failover protection)
2. Redundant variable-speed hot-swappable fan tray for cooling redundancy
3. Full OIR Online Insertion and Removal support for power supplies and fan trays (live replacement without chassis shutdown)
4. Sub-second Layer 2/Layer 3 convergence via Rapid STP and EIGRP/OSPF fast hello timers
5. No VSS virtual switching support (VSS introduced on WS-C4948E E-series models)

6. Typical Deployment Scenarios

1. SMB Medium Data Center Top-of-Rack Leaf Switch

   48×1G copper ports connect server racks, storage arrays and virtualization hosts; two dedicated X2 10GE uplinks trunk to campus aggregation/core switches, delivering high-speed east-west server traffic forwarding for small-to-medium data center leaf-spine architectures.
2. Medium Enterprise Building Distribution Aggregation

   Compact 1RU rack form factor fits limited wiring closet space; native 10GE fiber uplinks aggregate dozens of Catalyst PoE access switches, consolidating unified voice, video and surveillance traffic for entire multi-floor office towers.
3. Large Regional Branch Core Switch

   Serves as standalone multi-VLAN branch core, combining wire-speed Layer 3 inter-VLAN routing and high-capacity 10GE metro Ethernet WAN uplink aggregation without large modular Catalyst 4500 chassis footprint.
4. Legacy Catalyst 4500 Campus Core Uplink Expansion Companion

   Deployed as a dedicated high-speed 10GE uplink companion switch to expand fiber backbone port density for modular WS-C4507R+E / WS-C4510R+E campus core chassis.
5. Small Hospital / Education Unified Communications Aggregation

   Low-latency wire-speed forwarding supports medical thin clients, lab workstations and campus surveillance camera aggregation; redundant power eliminates downtime risks for mission-critical voice and video systems.

7. Standard Package Contents

Items Sold Separately (Not Included)

• AC or DC hot-swappable redundant power supply units
• X2 10GE optical transceivers for dedicated 10GE uplink slots
• RS232 serial console rollover cable
• Cable management accessories, fiber patch cords

Short Commercial Catalog Version (For Quotation & Datasheet Use)