Specifications

Data Sheet
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Enhanced Hardware Features
The Cisco Catalyst 2955 Switch has been designed for deployment in harsh environments.
Through the use of special thermal design techniques and industrial-rated components, the
Cisco Catalyst 2955 is rated to operate at extreme temperatures (-40° to 60° C; -40° to 140° F).
Robust mechanical specifications allow for its deployment as a mobile platform and under extreme
vibration and shock environments (50G trapezoidal shock pulse). The compact form factor, DIN
rail mounting, and dual cabling orientations facilitate its deployment into industrial enclosures,
traffic control cabinets, and transportation vehicles. Two normally open relays can be associated
with the different port alarms, power alarms, and high temperature conditions to send an output
signal to other external mechanisms (visible or audible alarms, for example), HMIs, or PLCs for a
controlled shutdown. Dual power inputs provide for optional redundant power supplies,
guaranteeing an even higher level of resiliency and reliability.
Figure 1. Cisco Catalyst 2955 Series Switches
Table 1. Product Features and Benefits
Feature Benefit
Availability
Superior redundancy for fault
backup
●
IEEE 802.1D Spanning-Tree Protocol support for redundant backbone
connections and loop-free networks simplifies network configuration and
improves fault tolerance.
●
Support for Cisco Spanning-Tree Protocol enhancements such as UplinkFast,
BackboneFast, and PortFast technologies helps ensure quick failover
recovery, enhancing overall network stability and availability.
●
IEEE 802.1w Rapid Spanning-Tree Protocol (RSTP) provides rapid
convergence of the spanning tree, independent of spanning tree timers.
●
Per VLAN Rapid Spanning Tree (PVRST+) allows rapid spanning-tree
reconvergence on a per-VLAN spanning-tree basis, without requiring the
implementation of spanning-tree instances.
●
Provides unidirectional link detection (UDLD) and Aggressive UDLD for
detecting and disabling unidirectional links on fiber-optic interfaces caused
by incorrect fiber-optic wiring or port faults.