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• Layer 2 Features
o Complies with the IEEE 802.3, IEEE 802.3u, IEEE 802.3ab, IEEE 802.3z Gigabit
Ethernet standards
o Supports Auto-negotiation and half duplex/full duplex modes for all 10Base-
T/100Base-TX and 1000Base-T ports
o Auto-MDI/MDI-X detection on each RJ-45 port
o Prevents packet loss with back pressure (Half-Duplex) and IEEE 802.3x PAUSE
frame flow control (Full-Duplex)
o Supports VLANs
IEEE 802.1Q Tagged based VLAN
Port-Based VLAN
GVRP
Up to 255 VLANs groups, out of 4K VLAN IDs
o Supports Spanning Tree Protocol
STP, IEEE 802.1D Spanning Tree Protocol
RSTP, IEEE 802.1w Rapid Spanning Tree Protocol
o Supports Link Aggregation
Up to 4 Trunk groups
Up to 4 ports per trunk group with 800Mbps bandwidth (Full Duplex mode)
IEEE 802.3ad LACP (Link Aggregation Control Protocol)
Cisco ether-Channel (Static Trunk)
• Quality of Service
o 4 priority queues on all switch ports
o Traffic classification by:
Port-Based priority
IEEE 802.1p Class of Service
IP TOS (Type of Service) priority
o Supports strict priority and Weighted Round Robin (WRR) policies
o Ingress/Egress Bandwidth control on each port
• Multicast
o IGMP Snooping v1 and v2
o IGMP Query mode for Multicast Media application
GE-DSH-73/DSH-82 and DSH-82-PoE User Manual
Chapter 1: Introduction
5
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