Белая книга для Cisco Cisco Nexus 5010 Switch

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The following command configures the ingress burst maximum. After one microburst occurs, the system will

generate a syslog message.

switch(config-if)# burst maximum ingress burst-count 1

The command shown here configures the egress burst maximum. After one microburst occurs, the system will a

generate syslog message.

switch(config-if)# burst maximum egress burst-count 1

Microburst Monitoring Verification

After you have configured all the parameters, the microburst monitoring feature on the Cisco Nexus 5600 platform

and Cisco Nexus 6000 Series Switches will monitor traffic behavior and count each microburst that is recognized.

The display will show the port, burst count, and burst direction. To display burst counters, run the show interface

burst-counters command. To display the count for only one interface, specifying the interface number after the

keyword interface.

switch# show interface burst-counters

--------------------------------------------------------------------

--------------------------------------------------------------------

| Ethernet1/1| 10| N/A| 10|

| fc2/1| 15| 0| 15|

The first column in the table indicates the interfaces on which microburst monitoring is configured. In the example,

microburst monitoring is configured on two interfaces: one Ethernet interface and one Fibre Channel interface. The

second column displays the number of microbursts that occurred in the ingress direction, going into the system, for

particular interfaces. In the example, bursts occurred on both interfaces going into the device. The third column

shows the number of bursts in the egress direction, going out of the system. In the example, Ethernet 1/1 shows

N/A in the Egress Bursts column, indicating that microburst monitoring in the egress direction is not configured on

this interface. The column for Interface FC2/1 shows that zero bursts have occurred in the egress direction, out of

the system. The third column shows the total number of bursts per interface in both directions.

The following is a sample log message showing a microburst event:

2011 Mar 5 01:13:23 %US switch %$ VDC-1 %$ R-2-SYSTEM_MSG: Micro Burst has been

detected on ingress side on Ethernet1/1 - bigsurusd

Conclusion

The microburst monitoring feature on the Cisco Nexus 5600 platform and Cisco Nexus 6000 Series Switches lets

you see the microbursts that have been silently occurring in the network. This real-time capability gives network

administrators a better understanding of the application demands on the network over time. Through this real-time

data analysis feature, congestion points and times can be understood so that the network architecture can be

optimized to meet the increasing demands of next-generation applications.