[lemma=ndus | tag=NN | □ | □]
[lemma=ndus | tag=NN | □=□ | □]
[lemma=ndus | tag=NN | !□ | □]
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 . It does this such that in the event of a primary Supervisor failure , the redundant Supervisor can assume the primary role ( stateful failover ) and continue to forward data using the last known set of routes ( non stop forwarding ) . For example , in a campus environment with geographically distributed switches someone could maliciously or accidentally interconnect incompatible switches , resulting in Inter-Switch Link ( ISL ) isolation and link disruption . In effect , Service OAM provides end-to-end manageability and visibility of Ethernet connections over any transport infrastructure ( such as MPLS , Virtual Private LAN Services [ VPLS ] , and provider bridges ( IEEE 802.1ad ) . Protecting against spoofing attacks allows a range of Denial of Service ( DoS ) attacks to be mitigated . This prevents TCAM starving that can occur due to a denial of service attack or by enabling too many services concurrently . 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 ) . With these macros , users can consistently and reliably configure essential security , availability , quality of service , and manageability features recommended for Cisco Business Ready Campus solutions with minimal effort and expertise . The categories under which the required Data Center features can be grouped are Comprehensive Resilience , Architectural Scalability , and Operational Manageability . Hot-swappable fan trays with redundant fans — Failure of a fan does not take down a switch or require a lengthy network outage to replace the fan or the entire switch , as in the case of a stackable unit . If a fan failure occurs , the system will notify the end user of the fan failure . Cisco Catalyst 6500 Series chassis can be deployed in the wiring closet , the distribution and core layers , the data center , and the WAN edge , providing the power and features required for end-to-end deployment for the enterprise campus , the ISP network , and metro and research computing networks . Cisco MDS 9500 Series directors deliver maximum system performance , even in the event of a crossbar failure . The Cisco Catalyst 2960 Series can perform rate limiting through its support of the Cisco committed information rate ( CIR ) function .