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Performance Manager gathers network device statistics historically and provides this information graphically using a web browser . This table summarizes the rankings as of September 4th , 2002 . While these services can be addressed by implementing standalone appliances , the Catalyst 6500 offers the added advantage of integrated these services into the switch chassis . For example , it would be undesirable to have a large file download destined to one port on a switch increase latency in voice traffic destined to another port on this switch . As the data load on the Data Center grows , so too the requirement for higher performance loads on these devices , which can be met by these modules . Servers whose Initial Sequence Number ( ISN ) is predictable can be controlled by a remote host by using a combination of source IP spoofing , trust exploitation , and ISN guessing . These statistics , as a percent of the total link capacity , are compared to the percent utilization configured for the threshold type . Redirection of a packet after a link failure using a routing protocol results in faster failover than a solution that uses Layer 2 spanning-tree enhancements . Consider another scenario where failover occurs to a redundant chassis and now the switch has to relearn all MAC addresses for dual homed hosts . The networking devices , however , also have a range of security features that should also be considered in parallel with those mentioned above . A major release usually occurs every 12 to 16 months . In this way , Performance Manager maintains significant historical data without the cost of an ever-increasing database size . All switches in the Cisco MDS 9000 Family enable fabric-wide authentication from one switch to another switch , or from a switch to a host . Baseline thresholds create a threshold that adapts to the typical traffic pattern for each link for the same time window each day , week , or every two weeks . These switch and host authentications are performed locally or remotely in each fabric . As an example the number of hosts infected by the " SQL slammer " worm doubled every 8.5 seconds and the traffic that it generated could grow to saturate a 1-Gbps link in less than a minute . You can sense this when you consider that the powerful TMP media machine did n't even put out a press release about this remarkable moment . This condition is avoided by ensuring that voice traffic is properly classified and prioritized throughout the network . This means it can configure itself to access Carrier Ethernet services . After FCS of each minor release , there is an initial deployment phase in which product defects are addressed in maintenance releases every 4 to 6 weeks . They look a lot like the first group but are either led by someone who understands how screwed up things are or have a cluster of professionals who are trying to change things . Interestingly , this finding provokes yet another definition of a passive vs. an active job hunter . We've long believed that management is " just another function " that had more status than it deserves .