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WS-C2955S-12
Cisco WS-C2955S-12 Catalyst 2955 12-Port Fast Ethernet DIN R...
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WS-C2955S-12 is a fanless, managed Layer 2 industrial switch with twelve 10/100 RJ-45 access ports and two fixed 100BASE-LX single-mode fiber uplinks. Its DIN rail form factor suits industrial enclosures rather than a full-width rack installation. The Cisco Catalyst 2955 Series serves production-control, transportation, and utility networks that require industrial hardware alongside configurable Ethernet switching. Copper connections accommodate control equipment and other independently powered endpoints; the access ports do not supply PoE. The discontinued WS-C2955C-12 differs by using 100BASE-FX multimode fiber uplinks. For an existing installation, the defining selection point is the single-mode fiber connection, not a removable uplink card or a higher-speed optical upgrade. The fixed uplink architecture therefore needs to match the equipment at the other end of the fiber.
WS-C2955S-12 price for new stock is is available on request. Get immediate quote. WS-C2955S-12 refurb price is $681.45.
Request bulk order quote for WS-C2955S-12 for additional pricing. Browse the full Cisco 2955 Catalyst Switches series or explore all Cisco products.
13.6 Gbps switching fabric provides the internal switching architecture, while the model's 2.8 Gbps forwarding bandwidth describes its aggregate forwarding capability. 2 Mpps forwarding handles Ethernet frames across the installed interfaces. WS-C2955S-12 carries 32 MB DRAM and 16 MB flash memory, with an 8000-entry MAC address table for learned destinations. An 8 MB shared-memory architecture buffers traffic, and four hardware output queues support traffic scheduling. RSTP and MSTP support loop-controlled redundant topologies; LACP and PAgP provide link aggregation. IGMP snooping controls multicast delivery, while port security and Private VLAN Edge restrict endpoint communication. Management includes Cisco CMS through a web browser, console CLI, SSH, Telnet, and SNMP, with CiscoWorks integration. SPAN and RSPAN support traffic inspection without changing the access-port configuration. 23W maximum consumption establishes the switch's own power requirement. Inter-VLAN routing is not provided, so routed traffic requires a separate routing device.
WS-C2955S-12 is offered new sealed or certified refurbished; refurbished units are inspected and bench-tested for power-on and POST, every port linking at rated speed, and a clean boot. Specify condition, quantity, and any required PWR-2955-AC= on the purchase order. ORM Systems provides up to a 3-year extended warranty for new units and up to 1 year for certified refurbished units, plus 30-day returns on every condition, terms apply; Cisco service has ended. Enterprise and volume orders can use PO acceptance, Net-30 for government, and RMA with advance replacement, with regional stock and RMA across the UK, EU, US, and MEA.
| Key Specs | Key Spec Values |
|---|---|
Operating System | Cisco IOS |
Port Configuration | 12 x 10/100 RJ-45 / 2 x 100BASE-LX |
Max Power Draw | 23W |
Cooling | Fanless |
Lifecycle Status | Retired / Cisco support ended |
When an existing control cabinet must retain its local alarm wiring, the Catalyst 2955 provides two normally closed relay outputs for port, power, or temperature alarms. Specify the required relay behavior and verify the cabinet's external alarm connections before ordering a like-for-like replacement for the installed unit.
When several existing industrial cabinets need a common configuration, Cisco CMS can manage a cluster of 16 switches through one IP address. Management clustering does not create a hardware stack. Specify the command-switch role, management addressing, and configuration baseline before placing a multi-site hardware order.
When a staging bench uses AC rather than the plant's DC feed, the optional PWR-2955-AC= requires separate environmental consideration: its operating range is -10°C to 60°C. Include PWR-2955-AC= in the bench equipment order and verify ambient conditions before using the same power arrangement in an industrial cabinet.
PoE-powered endpoints without separate power
WS-C2955S-12 has non-PoE Ethernet ports and cannot supply endpoint power through network cabling; connected equipment must receive its operating power independently.
Gigabit single-mode fiber uplink connections
WS-C2955S-12 has fixed 100BASE-LX uplinks operating at 100 Mbps; those connections do not provide a 1G or 10G fiber uplink.
Cisco-supported production hardware
WS-C2955S-12 belongs to the retired Catalyst 2955 family, and Cisco service has ended. Purchasing another unit cannot restore manufacturer support for this hardware.
Inter-VLAN routing within the switch
WS-C2955S-12 provides Layer 2 switching rather than IP routing. Networks requiring traffic to cross IP subnets need a separate routing device.
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| WS-C2955S-12 |  WS-C2955C-12 |  WS-C2955T-12 |  CBS350-48P-4X-EU |  MS150-48FP-4X | |
|---|---|---|---|---|---|
| Depth | 128 mm | 128 mm | 127.8 mm | 350 mm | 340 mm |
| Ethernet Technology | Fast Ethernet | Fast Ethernet | Fast Ethernet | Gigabit Ethernet | Gigabit Ethernet |
| Form Factor | DIN Rail Mount | DIN Rail Mount | DIN Rail Mount | Rack-Mount 1U | Rack-Mount 1U |
| Height | 96 mm | 96 mm | 96 mm | 44 mm | 44 mm |
| Manufacturer Part Number | WS-C2955S-12 | WS-C2955C-12 | WS-C2955T-12 | CBS350-48P-4X-EU | MS150-48FP-4X |
| Power Consumption | 23W | 23W | 23W | 471.9W | 891.4W |
| Switching Capacity | 13.6 Gbps | 13.6 Gbps | 13.6 Gbps | 176 Gbps | 176 Gbps |
| Weight | 1.4 kg | 1.4 kg | 1.4 kg | 5.43 kg | 5.4 kg |
| Width | 205 mm | 205 mm | 205 mm | 445 mm | 482 mm |
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WS-C2955S-12 identifies the Catalyst 2955 family, the S single-mode 100BASE-LX uplink variant, and twelve 10/100 copper access ports. The two fiber uplinks are additional to those access ports. The ordering identity distinguishes this model from the family's multimode-fiber and copper-uplink variants.
The Catalyst 2955 supports Cisco CMS web management, console CLI, SSH, Telnet, and SNMP, with CiscoWorks integration and Cisco Network Assistant support. These are management paths for a configurable switch, not an unmanaged device. Select the management method and prepare the required configuration before installing a replacement unit.
WS-C2955S-12 is part of the retired Catalyst 2955 family, and Cisco support has ended. A new sealed or certified refurbished unit does not restart manufacturer service. Treat an order as legacy hardware procurement and confirm that the organization's maintenance plan can operate without Cisco support.
ORM Systems offers WS-C2955S-12 new sealed or certified refurbished, with up to a 3-year extended warranty for new units and up to 1 year for certified refurbished units. Returns are 30 days on every condition; terms apply. Cisco service and warranty coverage have ended for the retired Catalyst 2955 family.
WS-C2955S-12 uses two fixed 100BASE-LX single-mode fiber uplinks with LC connectors, operating at 100 Mbps with a maximum specified reach of 15 km. These are built-in optical connections rather than removable uplink cards. Match the far-end interface, cable termination, and optical link requirements before ordering patch leads.
WS-C2955S-12 accepts two external 24V DC power inputs and consumes a maximum of 23W. The optional PWR-2955-AC= converts AC to 24V DC for installations without an existing DC source. Specify whether the order will use cabinet DC power or include PWR-2955-AC= as a separate power accessory.
The Catalyst 2955 mounts on a DIN rail, and STK-RACKMNT-2955= provides a DIN rail adapter for installation in an equipment rack. The switch chassis measures 96 mm high, 205 mm wide, and 128 mm deep. Specify the mounting arrangement and STK-RACKMNT-2955= when rack installation is required.
The Catalyst 2955 does not form a hardware stack; Cisco CMS instead supports management clustering of 16 switches through one IP address. A management cluster does not combine switching capacity into a shared stack. Specify ordinary network connections between units rather than dedicated stacking hardware or stack cables.
WS-C2955S-12 provides Layer 2 switching and does not provide IP routing between subnets. Traffic classification using IP or transport-layer information does not change that routing limit. Keep inter-VLAN routing on a separate routing device when specifying how an existing industrial network will connect to other IP subnets.
WS-C2955S-12 has a 13.6 Gbps switching fabric, 2.8 Gbps forwarding bandwidth, and a 2 Mpps forwarding rate. These figures describe different aspects of switching performance and should not be substituted for one another. Evaluate the installed Fast Ethernet interfaces and uplink traffic when sizing an existing network replacement.
WS-C2955S-12 uses 100BASE-LX single-mode fiber uplinks, whereas WS-C2955C-12 uses 100BASE-FX multimode fiber uplinks. Both have twelve 10/100 copper access ports and belong to the discontinued Catalyst 2955 family. The S model matches existing single-mode links; the C model matches existing multimode links when replacing legacy equipment.
WS-C2955S-12 has two 100 Mbps fiber uplinks, while WS-C2955T-12 has two 10/100/1000 copper uplinks. Both belong to the retired Catalyst 2955 family. For legacy replacement, the S model fits an existing single-mode fiber connection, while the T model fits an existing Gigabit-capable copper uplink arrangement.
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