CHAPTER 4.
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4-4
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4.3 Data Functions
OfficeServ 7100 functions as routers, switches, performs security function, or serves as
data network applications or data access interfaces (WAN, LAN).
4.3.1 Switches
802.1w Rapid Spanning Tree
Rapid Spanning Tree Protocol (RSTP) provides rapid convergence of the spanning tree and
provides for fast reconfiguration critical for networks carrying delay-sensitive traffic such
as voice and video. The specification for RSTP is IEEE 802.1w-2001.
The RSTP specification for provides compatibility with legacy STP based networks.
802.1p Packet Priority
The switch extracts the priority field from the Ethernet frame configured according to the
802.1p specification standard, and discriminatively processes the frame according to the
priority of the specified operation standard.
The packets are categorized into emergent packets and non-emergent packet and are processed.
VLAN (802.1Q)
The Virtual Local Area Network (VLAN) groups the related equipment in the work group
units according to the LAN operational policy regardless of the location of the user
equipment. The VLAN also processes switching for the work groups. The VLAN removes
the effects of unnecessary broadcasting packet and configures the stable switching subnet
only for the corresponding group by separating and processing the group in the virtual LAN.
Accordingly, the switch can provide the differentiated QoS services and the VLAN can be
configured based on the switch port and MAC address.
PoE (IEEE 802.3af) Function Supported
Power over Ethernet (PoE) is designed so that no additional power supply to the network
equipments used in wireless AP or other wired LAN is necessary. PoE allows the user to
send the data and the power simultaneously via one Ethernet cable, which reduces the
installation cost in most cases as well as provides the high flexibility in selecting the
installation site of the wireless AP and the network equipments.
QoS Function Supported
OfficeServ 7100 provides the function of 802.1p Packet Priority and Level Classification
Setup for supporting the Quality of Service (QoS). The 802.1p Packet Priority is the
expansion of the standard MAC header in the network packet. This expansion provides the
packets with priority by using 3-bit. The packet of the higher priority is treated
preferentially and is processed ahead than the packet of the lower priority.
The Level Classification Setup function gives the packets the levels of High/Low and
processes them according to their levels, which makes the differential services possible.
