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Because this circuit can be virtual , the capabilities to debug Ethernet wires such as those provided by the transport layer OAM mechanisms do not necessarily extend end-to-end . Three tiers of servers are used , those being Web , Application and Database . A high-speed fabric typically links these nodes up to provide a low latency path between nodes . Cisco has gone one step further by providing an OOB access to this in-band information . Consider another scenario where failover occurs to a redundant chassis and now the switch has to relearn all MAC addresses for dual homed hosts . Hosting and / or accelerating these applications in the network can dramatically improve scalability , availability , security and manageability of the storage environment-resulting in increased utility and lower total cost of ownership ( TCO ) . It provides an interesting picture of the Job Board Industry . Beyond meeting the basic requirements of nondisruptive software upgrades and redundancy of all critical hardware components , the Cisco MDS 9500 Series software architecture offers an unparalleled level of availability . These types of scenarios are described in the next section , along with recommendations . The Cisco Catalyst 3560 Series is equipped with a robust set of features that allow for network scalability and higher availability through IP routing as well as a complete suite of Spanning Tree Protocol enhancements aimed to maximize availability in a Layer 2 network . This form of attack can have the intended effect of initiating a Denial of Service attack on the switch control plane , which if Hardware MAC learning is used , can effectively mitigate this attack . Users can also manage the Catalyst 2940 series with Cisco Network Assistant , an advanced PC-based network management application . One of the primary benefits of this approach is the integrated services module typically provides a much higher level of performance than its equivalent standalone appliance equivalent . Therefore , when a new VSAN is created , a completely separate set of services , including name server , zone server , domain controller , alias server , and login server , is created and enabled across those switches that are configured to carry the new VSAN . This new product series represents the next generation in desktop switches , and features Cisco StackWise technology , a 32-Gbps stack interconnect that allows customers to build a unified , highly resilient switching system — one switch at a time . These Wizards and Smartports can save hours of time for network administrators , eliminate human errors , and ensure that the configuration of the switch is optimized for these applications . It 's becoming , on one level , a very solid mid-market play . These categories are outlined in this paper with examples of the type of services provided by these categories of applications . Today it is not uncommon to find a SAN that spans outside a data center for business continuance and disaster recovery purposes . It 's an interesting system that bears being mined for utility as we approach the dwindling of the workforce . It is targeted towards those users that are not familiar with the Cisco MDS 9000 Family CLI or prefer to use GUI interfaces .