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 specifica- tion 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 packets and are proc- essed.
The Virtual Local Area Network (VLAN) groups related equipment by work group accord- ing to the LAN operational policy, regardless of the location of the equipment. The VLAN also processes switching for work groups. The VLAN removes the effects of unnecessary broadcasting packets 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.
The system automatically configures the VLAN for IP phones, signal processing gateway, media gateway, and UMS required for OfficeServ 7400 services, and performs the QoS process. OfficeServ 7400 provides 32 VLAN groups.
The L2 switch (located in the lower layer of the IP router) can process IGMP (Internet Group Management Protocol) messages to allow Multicasting to be used. This is referred to as IGMP Snooping.
The IP layer multicast group information included in the IGMP message is reflected in the MAC filtering database, its own switching database. The group information is processed in the MAC multicast address format mapped with the IP multicast address.
IEEE 802.1x standards define the formats and the operational procedures of EAP over LAN (EAPoL) frame that can send/receive the Extensible Authentication Protocol (EAP) between terminals and the Access Point (AP). These standards are called the port security protocol because they can be used in the procedure permitting network access by the termi- nal only by acquiring the physical port license of the Bridge or wireless AP from the au- thentication server. This authentication procedure by ports enables control of charging poli- cies, usage restriction, band allocation, etc, separately.
Port Trunking Function Supported
Port Trunking means Port Aggregation, the collection of physical ports into logical ones. That is, like the 100 BASE-TX securing 100Mbps bandwidth, the function collects several ports into a logical port for expanding the bandwidth to be used.
PoE (IEEE 802.3af) Function Supported
Power over Ethernet (PoE) is designed so that no additional power supply to network equipment used in wireless or wired LAN is necessary. PoE allows the user to send the data and the power simultaneously via an Ethernet cable, thus reducing the installation cost in most cases and providing high flexibility in selecting the installation site for the equip- ment.
QoS Function Supported
OfficeServ 7400 provides the 802.1p Packet Priority and Level Classification Setup for supporting 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 pri- ority: a packet of higher priority is treated preferentially and is processed ahead of a packet of lower priority. The Level Classification Setup function gives the packets High/Low lev- els and processes them according to these levels, thus making the differential services pos- sible.
GARP/GVRP Function Supported
Generic Attribute Registration Protocol (GARP)/Generic VLAN Registration Proto-
col (GVRP) define a GARP application that provides the 802.1Q-compliant VLAN prun- ing and dynamic VLAN creation on 802.1Q trunk ports. GVRP is an application defined in the IEEE 802.1P standard that allows for the control of 802.1Q VLANs.
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Various Network Interface
OfficeServ 7400 provides the E0, E1, and E2 network interfaces (which are connected to the WAN through the Ethernet interface), and the serial network connected through the V.35, HSSI serial interface.
The OfficeServ 7400 configures a fixed routing table between each network interface to process the static routing. In this case, the routing table cannot be dynamically changed by the routing protocol, and specific routing services will be provided according to the pre-set routing policy.
WAN Interface (Ethernet, PPPoE, DHCP Client)
E0, E1, E2 Ethernet WAN Interface enables connection to the Internet using the Static IP, PPPoE, and DHCP client protocol.
V.35 Interface (PPP, HDLC, Frame Relay)
The OfficeServ 7400 accesses the Internet through the V.35 serial interface with a transfer speed of up to 2Mbps. In this case, the OfficeServ 7400 supports various environments us- ing functions such as PPP, HDLC, and Frame Relay Encapsulation.
HSSI Interface (PPP, HDLC, Frame Relay)
The Internet can be connected via the High Speed Serial Interface (HSSI) with a maximum transmission speed of 52Mbps. Generally, HSSI can use the equipment on a token-ring and Ethernet network for connecting to the equipment operating at the speed of a Synchronous Optical Network (SONET) OC-1 or T3 circuit.
The OfficeServ 7400 supports the ‘routing information exchanging’ protocol to react to network environmental change and to effectively process the routing.
y Routing Information Protocol version1 (RIPv1), RIPv2
These protocols are widely used for managing the routing information in a mid-size in- dependent network such as a group of LANs.
y Open Shortest Path First version2 (OSPFv2)
This routing protocol is used prior to the RIP in a large-size independent network. A router detects and reports any change in the routing table or the network to other routers. In this way, all routers share the same routing information.
y BGP4 (Border Gateway Protocol 4)
As an Exterior Gateway Protocol through which the Autonomous System (AS) sends/receives the routing information between other networks, Version 4 of BGP is cur- rently used. BGP4 uses various matrixes when selecting the optimized path to the destina- tion. BGP4 compares each matrix having priority and selects the optimized path.
y Internet Group Management Protocol (IGMP)
Internet Group Management Protocol (IGMP) protocol manages the multicast group op- erating at one Ethernet segment. It controls the segment so that a user can subscribe or secede as a member of the specific multicast group.
y Distance Vector Multicast Routing Protocol (DVMRP)
Distance Vector Multicast Routing Protocol(DVMRP) protocol supports the transmis- sion of multicast data in a network. This protocol sends the multicast data in a unicast packet format, and the packets are reassembled into multicast data at the destination. DVMRP can be operated in various network formats, including Ethernet, and can even be operated via routers that do not support multicast data. y Protocol Independent Multicast-Sparse Mode (PIM-SM) PIM-SM is designed to route multicast packets into multicast groups and to construct the allocation tree efficiently at WAN. This optimizes the number of data streams that can occur in this environment.
Routing between VLAN Groups
Communication between VLAN groups is done through routing between the groups.
HTBQ/Bandwidth on Demand (BoD)
The queuing process is differentially performed according to the level table where the routing process priority for a data server is defined.
The RTP (Real-Time Transport Protocol) packet is a VoIP media packet. The queuing proc- ess for the RTP packet is prior to that for other data packets, which helps to maintain the tone quality. This function is useful when using the VoIP function in a network where the VoIP packet that should be processed in real time and other packets for general office work are mixed.
This function checks the ToS (Type of Service) field of the IP header and processes it ac- cording to priority of the corresponding routing in the data server. This function reproduces the ToS field flowing into the data server, performs the routing process first of all, and heightens the process priority in the next HOFor AVAYA, NORSTAR, NEC, SAMSUNG, MITEL, PANASONIC, TOSHIBA telephone systems and voicemail call (866)206-2316 or email MasterTelephone@gmail.com
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