Monitoring Higig Link Bundles - Dell C9000 Series Networking Configuration Manual

Monitoring HiGig Link Bundles

You can monitor the HiGig link bundles that transmit data between internal backplane ports on line-card
(leaf) and switch fabric module (SFM - spine) network processing units (NPUs) and generate a system log
message or SNMP trap when traffic distribution in a link bundle is uneven. Each NPU is a Trident chip.
On the switch, backplane port channels operate as HiGig link bundles to transmit data traffic between line-
card and SFM NPUs. There are 11 line-card and 2 SFM NPUs. The two SFM (spine) NPUs include the switch
fabric module.
Each line-card use one NPU numbered 0. SFM NPUs are numbered 0 to 1.
Line-card and SFM NPUs use HiGig link bundles to transmit data.
• An SFM (spine) NPU uses 10 HiGig link bundles, one link bundle to transmit data to each line-card (leaf)
NPU. Each HiGig link bundle in an SFM NPU consists of three HiGig links.
• A line-card (leaf) NPU supports 24 front-end I/O ports and 6 backplane HiGig ports. The six backplane
links are members of 2 HiGig link bundles that connect the line-card NPU to each SFM (spine) NPU.
Three HiGig links in the bundle are used to connect to each SFM NPU
You can enable the capability to detect uneven traffic distribution in the member links of a HiGig link bundle
on a line-card or SFM NPU. You can also enable a notification to be sent using alarms and SNMP traps. The
algorithm used to determine uneven distribution of traffic is predefined.
Monitoring HiGig link bundles allows you to view and analyze unequal traffic flow in backplane port channels
and take corrective action. Alarms are generated if the link-bundle traffic threshold is greater than the
configured threshold and the unevenness is greater than 10 percent between links for three successive rate-
intervals. Alarms are removed when the link-bundle threshold is lower than the configured threshold and the
unevenness is less than 10 percent between links for three successive rate intervals.
An alarm includes the following information:
• Line-card or SFM NPU unit and HiGig port-channel ID in the format: hg-port-channel slot slot/
npu-id/hg-port—channel-id
• Alarm: triggered or cleared
Examples of the system log messages triggered when the threshold for a HiGig link bundle/port channel is
exceeded are:
• %STKUNIT0-M:CP %SWMGR-5-HG-BUNDLE_UNEVEN_DISTRIBUTION: Found uneven distribution in
hg-port-channel 0/5/0
• %STKUNIT0-M:CP %SWMGR-5-HG-BUNDLE_UNEVEN_DISTRIBUTION_ALARM_CLEAR: Uneven
distribution in hg-port-channel 0/5/0 got cleared
Interfaces 529