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Cisco WS-C4948-E Switch Overview
WS-C4948-E belongs to the Cisco Catalyst 3130X Series Switches, it widely used in the campus local area network (LAN) access. The Cisco Catalyst 4948E Ethernet Switch is built from the start to deliver class-leading, full-featured server-access switching. The switch offers forty-eight 10/100/1000 Gbps RJ45 downlink ports and four 1/10 Gigabit Ethernet uplink ports and is designed to simplify data center architecture and operations by offering service provider-grade hardware and software in a one Rack Unit (1RU) form factor optimized for full-featured Top-of-Rack (ToR) data center deployments. The Cisco Catalyst 4948E, with its advanced multicast support, is optimized for multimedia applications. It supports Protocol Independent Multicast (PIM), Source-Specific Multicast (SSM), and Pragmatic General Multicast (PGM), providing end users with additional scalability to support multimedia applications.
Cisco WS-C4948-E Switch Parameters
| Device Type | Switch - 48 ports - Managed |
| Enclosure Type | Rack-mountable 1U |
| Subtype | Gigabit Ethernet |
| Ports | 48 x 10/100/1000 + 4 x SFP+ |
| Performance | Switching capacity : 176 Gbps ¦ IPv4 switching : 131 Mpps ¦ IPv6 switching : 110 Mpps |
| Capacity | QoS hardware entries : 32000 ¦ Switched virtual interfaces (SVIs) : 4000 ¦ Active VLANs : 4096 ¦ Spanning Tree Protocol instances : 3000 |
| MAC Address Table Size | 55K entries |
| Jumbo Frame Support | 9216 bytes |
| Routing Protocol | RIP-1, RIP-2, static IP routing |
| Remote Management Protocol | SNMP 1, SNMP 2, RMON 1, RMON 2, RMON 3, RMON 9, Telnet, SNMP 3, HTTPS, TFTP, SSH, SSH-2, CLI |
| Features | Hot swap module replacement, Layer 2 switching, DHCP support, auto-negotiation, VLAN support, IGMP snooping, MAC address filtering, Broadcast Storm Control, IPv6 support, Multicast Storm Control, Spanning Tree Protocol (STP) support, Per-VLAN Spanning Tree (PVST), tunnelling, DHCP snooping, Dynamic Trunking Protocol (DTP) support, Port Aggregation Protocol (PAgP) support, Access Control List (ACL) support, Quality of Service (QoS),Jumbo Frames support, MLD snooping, Dynamic ARP Inspection (DAI), Time Domain Reflectometry (TDR), Per-VLAN Spanning Tree Plus (PVST+) |
| Compliant Standards | IEEE 802.3, IEEE 802.3u, IEEE 802.3z, IEEE 802.1D, IEEE 802.1Q, IEEE 802.3ab, IEEE 802.1p, IEEE 802.3ad (LACP), IEEE 802.1w, IEEE 802.1x, IEEE 802.1s, IEEE 802.3ah, IEEE 802.1ag |
| Power Redundancy | Optional |
| Dimensions (WxDxH) | 44.5 cm x 49.3 cm x 4.4 cm |
| Weight | 6.4 kg |
Optical Transceivers for Cisco WS-C4948-E Switch
Based on the SFP (optical module form factor) Gigabit Ethernet ports accommodate range SFP (optical module form factor) optical transceivers, including Cisco 1000BASE-T, 1000BASE-SX, 1000Base-LX/LH, 1000BASE-ZX. For more information on these Cisco optical transceivers, please check the following table.
| MFG Part number | Description | Price |
| GLC-T | Cisco GLC-T Compatible 1000BASE-T SFP Copper RJ-45 100m Transceiver | US$13.02 |
| GLC-TE | Cisco GLC-TE Transceiver Module Compatible 1000M SFP Copper 100m | US$13.02 |
| GLC-SX-MM | Cisco GLC-SX-MM Compatible 1000BASE-SX SFP 850nm 550m DOM Transceiver | US$6.00 |
| GLC-LH-SM | Cisco GLC-LH-SM Compatible 1000Base-LX/LH SFP 1310nm 10km Transceiver | US$7.00 |
| GLC-ZX-SM | Cisco GLC-ZX-SM Compatible 1000BASE-ZX SFP 1550nm 70km Transceiver | US$24.00 |
| GLC-SX-MMD | Cisco GLC-SX-MMD Compatible 1000BASE-SX SFP 850nm 550m DOM Transceiver | US$6.00 |
| GLC-LH-SMD | Cisco GLC-LH-SMD Compatible 1000Base-LX/LH SFP 1310nm 10km DOM Transceiver | US$7.00 |
| GLC-BX-D | Cisco GLC-BX-D Compatible 1000BASE-BX-D SFP 1490nm-TX/1310nm-RX 10km DOM Transceiver | US$12.00 |
| GLC-BX-U | Cisco GLC-BX-U Compatible 1000BASE-BX-U SFP 1310nm-TX/1490nm-RX 10km DOM Transceiver | US$9.00 |
| CWDM SFP | 1.25G CWDM SFP 1270~1450nm 120km LC DDM Optical Transceiver | US$55.00 |
| DWDM SFP | Cisco DWDM-SFP-3033 Transceiver Module Compatible 1.25G DWDM SFP DWDM:1528~1564nm 80km | US$186.00 |
How to determine what types of optical transceivers for Cisco switches?
1. Finding the corresponding optical module compatibility matrix via Cisco official website.
2. On the running switches, enter the privileged mode and input # "show idprom interface gi1 / 0/48" command, you can query the optical module model and serial number, If not, try to input other two commands: xuxic or show idprom int g2/6
3. Checking the type and port based on the specification, it can be used as long as it is gigabit SFP optical module interface. But the specific models to be decided according to the actual demand, such as type, the actual use of distance, single-mode or multimode, single fiber or dual fiber etc. Welcome to consult Cozlink engineer.
Summary
The Cisco WS-C4948-E uses Gigabit Ethernet SFP optical transceivers to establish fiber optic connections. These transceivers are field-replaceable, and provide uplink interfaces when inserted in an SFP module slot. All of these fiber optic transceivers can be found in Cozlink with high quality and competitive price. Moreover, most of them have adequate inventory, which ensures the customers to enjoy same day shipping. In addition to providing optical transceivers, Cozlink also offers patch cords, fiber optic pigtails and high speed cables for your choice.
