Application viewpoint: Comprehensive Analysis of CISCO switch 2950

CISCO has become a leader in the switch industry, so I have studied the comprehensive performance of CISCO switch 2950. I would like to share it with you here, hoping it will be useful to you. Fixed installation of wire speed fast Ethernet desktop CISCO switch 2950, can provide excellent performance and functionality for LAN. These independent, 10/100 adaptive CISCO switches provide enhanced service quality QoS) and multicast management features.

All of these are managed by the easy-to-use, Web-based Cisco Cluster Management Suite CMS) and the integration of Cisco IOS software. Cisco Catalyst 10/100 copper Gigabit with 1000/2950 BaseT uplinks provides ideal solutions for medium-sized companies and Enterprise Branch Offices, to enable them to upgrade from Fast Ethernet to a higher-performance gigabit Ethernet trunk using existing 5-class copper lines.

The CISCO switch 2950 series includes Catalyst 2950T-24, 2950-24, 2950-12, and 2950C-24 switches. The Catalyst 2950-24 switch has 24 10/100 ports; 2950-12 has 12 10/100 ports; 2950T-24 has 24 10/100 ports and 2 fixed 10/100/1000 BaseT uplink ports; 2950C-24 has 24 10/100 ports and 2 fixed 100 BaseFX uplink ports. Each switch occupies a cabinet unit RU) so that they can be conveniently configured to the desktop and installed in the wiring room.

Connect a terminal workstation to a LAN with line rate performance

Because the CISCO switch 2950 has a 4.4 Gbps switching backplane and a maximum data throughput of Gbps, it can provide wire speed connection performance on each port when connecting the terminal workstation and the user to the company's LAN. The Catalyst 2950 switch supports performance enhancement features such as Fast EtherChannel Fast Ethernet channel) and GigabitEtherChannel Gigabit Ethernet channel) technology, A maximum of 4 Gbps high-performance bandwidth can be provided between a Catalyst 2950 switch, router, and server.

Port LAN to gigabit speed

Now, middle-end market customers who are still using copper wire Category 5 Non-shielded cables in the building) have the right solution to upgrade their LAN to gigabit speed. Catalyst 2950T-24 has two fixed 10/100/1000 BaseT copper Gigabit Ethernet ports for desktop connections, and 24 10/100 ports. In this way, medium-scale companies can upgrade their LAN to a higher-performance gigabit Ethernet, and the cost increase per port is not large.

When connected to the new Catalyst 3550-12T multi-layer Gigabit Ethernet switch, the Catalyst 2950T-24 switch provides an integrated copper Gigabit Ethernet solution for medium market customers who need to upgrade their fast Ethernet trunk.

Excellent Service Quality

The Catalyst 2950 series provides excellent LAN edge QoS, Which is unmatched in the industry. All CISCO switches 2950 support two modes of multiclass classification. A mode is based on the IEEE 802.1p standard and complies with the Access Point Service Level CoS) value and distributes data packets to appropriate queues. In the second mode, data packets are reclassified Based on the default CoS value assigned to the access port by the network administrator. If no CoS value (for example, an untagged frame) exists for the arriving frame, CISCO switch 2950 classifies it based on the default CoS value assigned to each port by the network administrator.

Once data frames are classified or reclassified using the two modes mentioned above, they are allocated to the most appropriate output queue. CISCO switch 2950 supports four output queues, making it easier for network administrators to differentiate and target priorities for various LAN traffic applications. Strict priority allocation ensures that time-sensitive applications, such as voice, always use high-speed paths when switching structures. In addition, the weighted cyclic WRR (weighted cyclic WRR) policy can also ensure that low-priority loads are not configured by the network administrator.

These features enable network administrators to take critical tasks and time-sensitive traffic, such as ERPOracle, SAP, etc.), voice IP phone traffic) and CAD/CAM, higher priority than low-time sensitive applications such as FTP or e-mailSMTP.

Implement multicast management using IGMP listening

Internet Group Management Protocol (IGMP) Listening allows the switch to "listen" to conversations between hosts and routers. When the host sends a multicast group IGMP request, the switch attaches the host port number to the group Destination Address GDA) list. Similarly, when the switch hears an IGMP exit request, it moves the host port number from the entry of the content addressing memory CAM table. By supporting hardware IGMP listening and implementing IGMP listening configuration through the Cisco cluster management suite, the Catalyst 2950 vswitch provides excellent performance and ease of use when controlling and managing LAN multicast applications.

Cisco Cluster Management Suite

Cisco Cluster Management Kit CMS) is a set of Web-based software embedded into Catalyst 2950, 3350-12 T, 3500XL, 2900XL, and 1900 switches. Using Cisco switch cluster technology, users can access CMS using any standard Web browser, A single IP address can be used to manage up to 16 interconnected Catalyst 2950, 3550-12 T, 3500XL, 2900XL, and 2900 switches, regardless of their geographical location relationship. CMS provides an integrated management interface for all Cisco IOS functions and firmware management, providing a powerful graphical user interface GUI for administrators) tools to conveniently monitor and manage their local networks.

CMS supports various standard options and configurations, and provides various levels of scalability to meet customer needs. The cluster connection options for the CISCO switch 2950 include Ethernet, fast Ethernet, fast Ethernet, and Gigabit Ethernet connections. Because it is not technically limited by dedicated stack modules or stack cables, CMS extends the traditional cluster domain out of a single wiring room and enables users to mix and match network interconnection, to meet specific management, performance, and cost requirements.

A cisco switch 2950 can be configured as a command or a member switch in a Cisco switch cluster. The command switch acts as a single IP address management point and generates all management commands issued by the Administrator. A command switch can contain up to 15 member switches connected to any media. In addition, CMS allows the network administrator to allocate backup or redundant command switches. When the master command switch fails, the system takes control management tasks.

Enhanced security, management, and integrated Cisco IOS features

CISCO switch 2950 has several unusual features to improve network performance, manageability, and security. Network administrators can configure up to 64 virtual VLAN VLANs for each vswitch) to achieve higher data security and enhanced LAN performance. This ensures that data packets are transmitted only to the workstation in a specific VLAN, which is equivalent to creating a virtual firewall between ports in the network, thus reducing Broadcast Transmission. A VLAN trunk can be created from any port using the standard 802.1Q VLAN trunk structure. Each VLAN spanning tree (PVST +) allows users to establish redundant uplink links and allocate traffic loads through multiple links. These are all implemented through standard Spanning Tree Protocol STP. In addition, Cisco's Uplink Fast Uplink technology also ensures immediate transmission to the secondary Uplink, far better than the traditional collection time of 30 to 60 seconds. This is another enhancement of STP.

With CISCO vswitch 2950, network administrators can achieve high levels of port and console security performance. Media Access Control MAC) address-based port-level security can prevent unauthorized workstation access to the switch. In addition, you can create access permissions for static and dynamic addresses to provide administrators with powerful control over network access. The multi-layer access security of the vswitch console prevents unauthorized users from accessing or changing the vswitch configuration. The Access Control System of the Terminal Access Controller is TACACS +. The access control of a large number of network devices can be centrally coordinated.