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Cisco Catalyst 2960-XR Configuration Guide

Cisco Catalyst 2960-XR
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Listening State
The listening state is the first state a Layer 2 interface enters after the blocking state. The interface enters this
state when the spanning tree decides that the interface should participate in frame forwarding.
An interface in the listening state performs these functions:
Discards frames received on the interface
Discards frames switched from another interface for forwarding
Does not learn addresses
Receives BPDUs
Learning State
A Layer 2 interface in the learning state prepares to participate in frame forwarding. The interface enters the
learning state from the listening state.
An interface in the learning state performs these functions:
Discards frames received on the interface
Discards frames switched from another interface for forwarding
Learns addresses
Receives BPDUs
Forwarding State
A Layer 2 interface in the forwarding state forwards frames. The interface enters the forwarding state from
the learning state.
An interface in the forwarding state performs these functions:
Receives and forwards frames received on the interface
Forwards frames switched from another interface
Learns addresses
Receives BPDUs
Disabled State
A Layer 2 interface in the disabled state does not participate in frame forwarding or in the spanning tree. An
interface in the disabled state is nonoperational.
A disabled interface performs these functions:
Discards frames received on the interface
Discards frames switched from another interface for forwarding
Does not learn addresses
Catalyst 2960-XR Switch Layer 2 Configuration Guide, Cisco IOS Release 15.0(2)EX1
20 OL-29424-01
Configuring Spanning Tree Protocol
Spanning Tree Protocol

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Cisco Catalyst 2960-XR Specifications

General IconGeneral
Stacking Bandwidth80 Gbps
Layer SupportLayer 2 and Layer 3
Jumbo Frame Support9198 bytes
RAM512 MB
Input Voltage100-240V AC
ModelCatalyst 2960-XR
Uplink Interfaces4 x 1G SFP or 2 x 10G SFP+
Downlink Interfaces24 or 48 x Gigabit Ethernet ports
Power SupplyInternal
MAC Address Table Size16, 000 entries
PoEAvailable on PoE models
Weight4.5 kg
Featuresenergy efficiency
StackingUp to 8 switches
Operating Temperature0 to 45°C

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