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Cisco WS-CBS3125X-S Switch Overview
WS-CBS3125X-S belongs to the Cisco Catalyst 3120X Series Switches, it widely used in the campus local area network (LAN) access. The Cisco Catalyst Blade Switch 3120 represents the next-generation networking solution for blade server environments. Built on the market-leading Cisco hardware and Cisco IOS software, the Cisco Catalyst Blade Switch 3120 is engineered with unique technologies specifically designed to meet the rigors of blade server-based application infrastructure. Specifically, the switch is designed to deliver scaleable, high-performance, highly resilient connectivity while supporting ongoing IT initiatives to reduce server infrastructure complexity and total cost of ownership. The Cisco Catalyst Blade Switch 3120X for HP allows customers to connect the switch to the existing network fabric using Gigabit and 10 Gigabit Ethernet uplinks.

Cisco WS-CBS3125X-S Switch Parameters
| Device Type | Switch - 16 ports - Managed - stackable |
| Enclosure Type | Plug-in module |
| Subtype | Gigabit Ethernet |
| Ports | 16 x backplane + 2 x X2 + 4 x 10/100/1000 |
| Routing Protocol | RIP-1, RIP-2, HSRP, DVMRP, PIM-SM, static IP routing, PIM-DM, OSPFv3, PIM-SSM, RIPng |
| Remote Management Protocol | SNMP 1, RMON 1, RMON 2, Telnet, SNMP 3, SNMP 2c |
| Features | Auto-negotiation, ARP support, load balancing, IGMP snooping, IPv6 support, DHCP snooping, Dynamic Trunking Protocol (DTP) support, Port Aggregation Protocol (PAgP) support, Quality of Service (QoS), Jumbo Frames support, virtual blade switch (VBS) |
| Compliant Standards | IEEE 802.1D, IEEE 802.1p, IEEE 802.3ad (LACP), IEEE 802.1w, IEEE 802.1x, IEEE 802.1s |
| Dimensions (WxDxH) | 27.7 cm x 19.3 cm x 2.8 cm |
| Weight | 1.4 kg |
Optical Transceivers for Cisco WS-CBS3125X-S 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. 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-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 |
How to determine what types of optical transceivers for Cisco switches?
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