Suzhou Fu ProMOS Technologies Ltd. is the intelligent construction with high-tech enterprise qualification levels of security, professional undertaking weak engineering, computer room construction, closed-circuit monitoring system, anti-theft alarm system, intelligent building intercom system, the campus radio systems, multimedia conferencing systems, hospital call system, attendance Patrol System, LED electronic display, solar lighting and other projects, to provide professional design, construction, installation, commissioning and maintenance. Cisco Catalyst 2918 switches and enhanced by a full set of multicast filtering Spanning Tree Protocol (Spanning Tree Protocol, STP), to achieve the network scalability and higher availability. The standard Spanning Tree Protocol (STP) of improvements, such as PVST +, UplinkFast and PortFast, to achieve maximum network uptime. PVST + can perform Layer 2 load sharing on redundant links to efficiently use the extra capacity inherent in a redundant design. UplinkFast, PortFast, and BackboneFast all greatly reduce the standard 30-60 seconds Spanning Tree Protocol convergence time. The loop guard and bridge protocol data unit (BPDU) guard enhancements to avoid Spanning Tree Protocol loops. Configuring Cisco Catalyst 2918 Series switches consists of the following switches (see Figure 1): Cisco Catalyst 2918-24TT-C: 24 10/100 Ethernet ports and two 10/100 / 1000BAST-T uplink port Cisco Catalyst 2918-24TC- C: 24 10/100 Ethernet ports and two dual-purpose uplink port (10/100 / 1000BASE-T or SFP) Cisco Catalyst 2918-48TT-C: 48 10/100 Ethernet ports and two 10/100 / 1000BAST-T uplink port Cisco Catalyst 2918-48TC-C: 48 10/100 Ethernet ports and two dual-purpose uplink port (10/100 / 1000BASE-T or SFP) SFP-based Gigabit Ethernet port supports Cisco 1000BASE-SX, 1000BASE-LX and 100BASE-FX SFP transceiver. Features and Benefits Feature Benefit Table 1. Cisco Catalyst 2918 switches are easy to use and deploy? Quick Setup Chinese interface through a Web browser-based simplifies the initial configuration, without the need for more complex terminal emulation programs and CLI knowledge. ? DHCP through a boot server to automatically configure multiple switches, thereby simplifying the deployment of the switch. ? Auto-negotiation on all ports automatically selects half- or full-duplex transmission mode to optimize bandwidth. ? Dynamic Trunking Protocol (DTP) enables dynamic trunk configuration across all switch ports. ? Port Aggregation Protocol (PAgP) automates the creation of Cisco Fast EtherChannel or Gigabit EtherChannel groups ò to connect to another switch, router, or server. ? Link Aggregation Control Protocol (LACP) allows users to take advantage of the device to create compliance with IEEE 802.3ad Ethernet channel. This feature is similar to Cisco EtherChannel technology and PAgP. ? 1000BASE-SX, 1000BASE-LX / LH and 100BASE-FX physical interface through a field-replaceable SFP module support, providing flexibility in switch deployment. ? If you installed the wrong port on copper certain cable type (crossover or straight-through), depending on the medium interface crossover (auto-MDIX) automatically adjusts transmit and receive pairs. ? Time Domain Reflectometry (TDR) to diagnose and resolve cabling problems on copper ports. Manageability excellent manageability? Support Cisco IOS CLI. ? Use 802.1q tags, from any port to create VLAN trunks. ? Each switch can support up to 64 and 64 VLAN Spanning Tree (STP). ? Supports 4000 VLAN ID. ? Cisco VTP supports dynamic VLAN and dynamic trunk configuration across all switches. ? I高标准v3 snooping allow clients to join quickly leaves of multicast streams, will occupy a high-bandwidth video traffic transmission only to the requesting user. ? Embedded Remote Monitoring (RMON) software agent supports four RMON groups (history, statistics, alarms, and events). ? Cisco Discovery Protocol Versions 1 and 2 help to switch automatically discover network management tools, and Cisco IP phones to communicate about the voice VLAN information. Chinese graphical interface based on Cisco Quick Set? Quick Setup feature through a Web browser simplifies the initial configuration of the switch, without terminal emulation program and for the command-line interface (CLI) understanding, thereby reducing the cost of deployment. Availability and scalability excellent redundancy for the backup fault? Cisco UplinkFast and BackboneFast technologies ensure quick failover, enhancing overall network stability and reliability. ? IEEE 802.1w Rapid Spanning Tree Protocol provides counter-independent spanning Rapid Spanning Tree convergence, and the advantages of distributed processing. ? Unidirectional Link Detection Protocol (UDLD) and Aggressive UDLD allow unidirectional links can be detected and disabled to avoid problems such as spanning-tree loops. ? Switch port auto-recovery can automatically try to re-establish due to a network error disabled links. ? Through Cisco Gigabit EtherChannel technology, and Cisco Fast EtherChannel technology, were able to achieve 8Gbps bandwidth aggregation and 800Mbps, which can enhance fault tolerance, and between switches, and routers and switches to a single server, providing higher The total bandwidth. The integrated Cisco IOSò software features help optimize bandwidth? Single port-based broadcast, multicast, and unicast storm control can prevent the device performance of the whole system is faulty decreased. ? IEEE 802.1s Multiple STP can be a spanning-tree instance per VLAN, enabling Layer 2 load sharing on redundant links. ? At the same time using a local proxy ARP and Private VLAN Edge, can minimize broadcasts and maximize available bandwidth. ? VLAN1 minimization allows VLAN1 can be disabled on any individual VLAN trunk link. ? VTP pruning can limit bandwidth usage VTP link aggregation connections. ? I高标准 filtering to filter out unauthorized users and limit the number of concurrent multicast streams per port to provide multicast authentication. QoS and Control Advanced QoS? Support 802.1p CoS. ? 4 output queues per port allows users to perform on four different types of traffic management. ? SRR scheduling to ensure a different priority for packet traffic. ? Weighted Tail Drop (WTD) energy before a disruption occurs, the input and output queues provide congestion avoidance function. ? Strict priority queuing to ensure that the highest-priority packets are serviced to all other traffic. Safety cover the entire network security features? IEEE 802.1x allows dynamic, port-based security, providing user authentication. ? Unicast MAC filtering through a matching MAC address to prevent any type of packet forwarding. ? SSHv2 and SNMPv3 can connect through Telnet and SNMP encrypting administrator traffic, providing network security. ? Bidirectional data support on the SPAN port allows Cisco Secure Intrusion Detection System (IDS) to take action when an intruder is detected. ? TACACS + and RADIUS authentication on the switch can be centrally controlled, and to prevent unauthorized users from altering the configuration. ? MAC address notification allows administrators to add the network or to be notified when deleting users. ? Port security can be based on MAC addresses, the protection of an access or trunk port access. ? BPDU guard when receiving energy to avoid accidental topology loops BPDU, close support Spanning Tree Protocol PortFast-enabled interfaces. ? STRG not prevent in the network administrator's control from becoming Spanning Tree Protocol root nodes edge devices. I高标准 filtering unless specified user can pass filter visitors, provides multicast authentication, restrictions on each available port number of concurrent multicast streams