Level One GTL-2891 User Manual

GTL-2891 Version: 1

28-Port Stackable L3 Managed Gigabit Switch, 2 x
10GbE SFP+, 1 x 10GbE Module Slot

The GTL-2891 are a family of high-performance Gigabit Ethernet Layer 3 switches featuring 28 ports; with
24 10/100/1000BASE-T ports, 2 10G SFP+ ports, and one 10G dual port expansion slot. The switches are
ideal for high-performance server aggregations, such as enterprise data centers, where they can connect
high-end or network-attached files servers over fiber ports. They can also be deployed as a backbone
upgrade, or to provide Gigabit–to-the-desktop for power users. These switches are packed with features
and are a cost-effective solution that bring continuous availability, enhanced security, and advanced QoS
to the network edge, while maintaining simplicity of management.

Key Features

Dynamic ARP Inspection (DAI) protects switches against ARP spoofing

­Stacking up to 8 switches in one stack

­Support Operations, Administration, and Maintenance (OAM) mechanisms

­Ethernet Ring Protection Switching (ERPS) for Ethernet ring topologies with sub-50 ms failover

­capabilities
IEEE 802.1d/w Spanning Tree Protocol (STP) and port mirroring

­IEEE 802.3ad LACP for auto port aggregation

­Supports port-based VLAN, IEEE 802.1Q VLAN Tagging

­QoS control for traffic prioritization and bandwidth management

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Specifications

System Specifications

Standards & Protocols:

IEEE 802.1p Quality of Service (QoS)
IEEE 802.1x port authentication
IEEE 802.3x Ethernet frame start and stop requests
and timers used for flow control on full-duplex links
IEEE 802.3u CSMA/CD access method and physical
layer specifications for 100 BASE-TX Fast Ethernet
IEEE 802.3z CSMA/CD access method and physical
layer specifications for 1000 BASE Gigabit Ethernet
IEEE 802.1q Virtual LAN
IEEE 802.1d Spanning Tree Protocol
IEEE 802.3ad Link Aggregation Control Protocol (LACP)
IEEE 802.1s Rapid Spanning Tree Protocol
IEEE 802.1w Multiple Spanning Tree Protocol

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Memory:

Flash Memory : 128 MB
DRAM : 256 MB

Buffer Memory:

1.5 MB

Connectors and Cabling:

24 x 10/100/1000Mbps RJ45 port
2 x 10G SFP port
1 x RJ45 Console port
1 Slots for 2 x 10G Stacking /Uplink

Indicator:

LED indicaters : Port, Uplink, System, Diagnoustic

Transmission Method:

Store and Forward

Power Input:

AC Input : 100 to 240 V, 50-60 Hz, 1.5 A

Power Consumption:

35 W

Features

General:

OAM :
IEEE 802.3ah Link
IEEE 802.1ag Connectivity Fault
Management (CFM)
ITU-T Y.1731 performance and
throughput management
Stacking Features :
IP Clustering up to 36 devices,
bandwidth up to 20G
Hardware Stacking up to 8 units,
bandwidth up to 20G
Quality of Service(QoS):
Traffic Classification based on
IEEE 802.1p CoS, IP Precedence,
IP DSCP
Traffic Scheduling based on Strict
Priority, Weighted Round Robin,
Strict + WRR traffic scheduling
IGMP Snooping
MVR (Multicast VLAN Registration)
QinQ/Selective QinQ
G.8032 (ERPSv1/v2)
IPv4/IPv6 dual protocl stack
VLANs:

- Supports 4K IEEE 802.1Q VLANs

- Port-based

- GVRP/GARP

- VLAN Translation

- IEEE 802.1v Protocol-based VLANs

- MAC-based VLANs

- IP subnet-based VLAN

- Private VLAN (Community)

- Traffic Segmentation (port isolated)

- Guest VLAN

- Voice VLAN

- VLAN trunking

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