This capability detects whether the configured applications or utilities are causing traffic to be unevenly distributed on a hiGig linkbundle for best performance. This capability to monitor the port channel bundles is applicable for any platform that containsbackplane high-Gigabit Ethernet links.The collected and derived data rates for the configured rate-interval monitor and examine the working efficiency and traffic-handlingcapacity of the LAG bundles on high-Gigabit Ethernet trunk interfaces that are created statically.To adjust and modify the switch for effective utilization of backplane links, examine the working efficiency of the LAG bundleinterfaces.Alarms are generated if the port-channel threshold is greater than the configured threshold, and the unevenness is greater than 10percent between the links for three successive rate-intervals.Alarms are removed if the port-channel threshold becomes lower than the configured threshold, and the unevenness is less than 10percent between the links for three successive rate-intervals, multiplied by three time intervals.The following log messages are generated when the threshold for high-Gigabit port channel or LAG bundle monitoring has exceeded:• An informational message when an alarm is triggered for uneven distribution observed in a LAG bundle• An informational message when the alarm is clearedThe following additional information is recorded in the alarm:• Link bundle name (hg-port-channel slot/NpuId/BundleId)• Alarm raising or clearingThe following examples display the system log messages triggered when the threshold for high-Gigabit port channel monitoring hasexceeded:• %STKUNIT0-M:CP %SWMGR-5-HG-BUNDLE_UNEVEN_DISTRIBUTION: Found uneven distribution in hg-port-channel0/5/0• %STKUNIT0-M:CP %SWMGR-5-HG-BUNDLE_UNEVEN_DISTRIBUTION_ALARM_CLEAR: Uneven distribution in hg-port-channel 0/5/0 got clearedGuidelines for Monitoring High-Gigabit Port ChannelsKeep the following points in mind when you activate and examine the utilization and working-efficiency of backplane high-GigabitEthernet port channels as trunk groups:• By default, the capability to monitor the traffic utilization and distribution of high-Gigabit Ethernet trunk groups is disabled.• Each NPU unit in each line card (or control processor card) can contain multiple trunk groups (high-Gigabit port channels). Theinterface specifier convention for hg-port-channel is slotId/npuUnitId/localPortChannelId, which denotes the slot, NPU, and theport channel identifiers.• For Z9000, slotId (stack unitId) is constant and does not vary. NpuUnitId ranges from 0-5 and local portChannelId ranges from0-0 for leaf NpuUnits and 0-3 for spine NpuUnits.• Link-bundle monitoring starts if monitoring is enabled for the bundle whose egress utilization exceeds a threshold. This behavioris required if you want to view the utilization alarms only when the utilization levels are high. At low utilization levels, it is possiblethat there are only one or two significant flows that are causing unevenness. Such an imbalanced traffic flow is not critical orindicative of a problem. The hiGig link bundle trigger threshold is a system-wide or a global setting for the device.• If you enabled the generation of SNMP traps, syslogs and traps are transmitted when an uneven distribution is observed.Another syslog and trap is generated when the unevenness is cleared.• Link bundle utilization is calculated as the bandwidth-weighted mean utilization of all links in a bundle (calculated as [totalbandwidth of all links / total bytes-per-sec of all links]). This calculation is performed only on those links that are up on theiroperational status.Link Aggregation Control Protocol (LACP) 389
