Cisco 2975 - Catalyst LAN Base Switch, Руководство по настройке программного обеспечения

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Catalyst 2975 Switch Software Configuration Guide
OL-19720-02
Chapter 1 Overview
Network Configuration Examples
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Server aggregation ( Figure 1-3 )—You can use the switches and switch stacks to interconnect groups
of servers, centralizing physical security and administration of your network. For high-speed IP
forwarding at the distribution layer, connect the switches in the access layer to multilayer switches
with routing capability. The Gigabit interconnections minimize latency in the data flow.
QoS and policing on the switches provide preferential treatment for certain data streams. They
segment traffic streams into different paths for processing. Security features on the switch ensure
rapid handling of packets.
Fault tolerance from the server racks to the core is achieved through dual homing of servers
connected to dual switch stacks, which have redundant Gigabit EtherChannels and cross-stack
EtherChannels.
Using dual SFP module uplinks from the switches provides redundant uplinks to the network core.
Using SFP modules provides flexibility in media and distance options through fiber-optic
connections.
The various lengths of stack cable available, ranging from 0.5 meter to 3 meters provide extended
connections to the switch stacks across multiple server racks, for multiple stack aggregation.
Figure 1-3 Server Aggregation
Small to Medium-Sized Network Using Catalyst 2975 Switches
Figure 1-4 shows a configuration for a network of up to 500 employees. This network uses a
Catalyst 2975 switch stack with high-speed connections to two routers. This ensures connectivity to the
Internet, WAN, and mission-critical network resources if one of the routers fails. The switch stack uses
cross-stack EtherChannel for loading sharing.
The switches are connected to workstations and local servers. The server farm includes a call-processing
server running Cisco CallManager software. Cisco CallManager controls call processing, routing, and
Cisco IP Phone features and configuration. The switches are interconnected through Gigabit interfaces.
250873
Campus
core
Catalyst
6500 switches
Catalyst 2975
switch stack
Access-layer
Catalyst
switches
Server racks