User’s Manual of GS-5220 LCD Series
32
Layer 2 Features
■ Prevents packet loss with back pressure (half-duplex) and IEEE 802.3x pause frame flow control
(full-duplex)
■ High performance of Store-and-Forward architecture and runt/CRC filtering eliminates erroneous
packets to optimize the network bandwidth
■ Storm Control support
− Broadcast/Multicast/Unknown unicast
■ Supports VLAN
− IEEE 802.1Q tagged VLAN
− Up to 255 VLANs groups, out of 4094 VLAN IDs
− Supports provider bridging (VLAN Q-in-Q, IEEE 802.1ad)
− Private VLAN Edge (PVE)
− Protocol-based VLAN
− MAC-based VLAN
− Voice VLAN
■ Supports Spanning Tree Protocol
− IEEE 802.1D Spanning Tree Protocol
− IEEE 802.1w Rapid Spanning Tree Protocol
− IEEE 802.1s Multiple Spanning Tree Protocol, spanning tree by VLAN
− BPDU Guard
■ Supports Link Aggregation
− 802.3ad Link Aggregation Control Protocol (LACP)
− Cisco ether-channel (static trunk)
− Maximum 14 trunk groups, up to 4 ports per trunk group (GS-5220-24(U)P(L)4XV(R))
− Maximum 9 trunk groups, up to 2 ports per trunk group (GS-5220-16(U)P2XV(R))
− Maximum 12 trunk groups, up to 8 ports per trunk group (GS-5220-16T2XV(R)/GS-5220-24T4XV(R))
■ Provides port mirror (many-to-1)
■ Port mirroring to monitor the incoming or outgoing traffic on a particular port
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