VLT Bandwidth MonitoringWhen bandwidth usage of the VLTi (ICL) exceeds 80%, a syslog error message (shown in the followingmessage) and an SNMP trap are generated.%STKUNIT0-M:CP %VLTMGR-6-VLT-LAG-ICL: Overall Bandwidth utilization of VLT-ICL-LAG(port-channel 25)crosses threshold. Bandwidth usage (80 )When the bandwidth usage drops below the 80% threshold, the system generates another syslog message(shown in the following message) and an SNMP trap.%STKUNIT0-M:CP %VLTMGR-6-VLT-LAG-ICL: Overall Bandwidth utilization of VLT-ICL-LAG(port-channel 25)reaches below threshold. Bandwidth usage (74 )VLT show remote port channel statusVLT and High AvailabilityHigh availability (HA) support on VLT ensures seamless and uninterrupted flow of VLT features during RPMfailure (failover).When RPM failover happens, the new active RPM triggers a new VLT registration to its VLT peer. It ensuresthat the VLT node with new active RPM receives all the VLT information from its VLT peer. When the standbyRPM performs the check-in and registration function (with the active RPM), the latter performs a bulksynchronization of all the peer VLT information. The existing CLI configuration synchronized to the standbyRPM ensures that the local VLT configurations are always available at standby RPM as well. The VLT backuplink functionality is also modified to manage the two management interfaces in a dual RPM. A virtualmanagement IP must be configured on the dual RPM VLT node to maintain uninterrupted VLT backupfunctionality. For more information, refer to “VLT backup link” section in the Configuration NotesVLT and IGMP SnoopingWhen configuring IGMP Snooping with VLT, ensure the configurations on both sides of the VLT trunk areidentical to get the same behavior on both sides of the trunk.When you configure IGMP snooping on a VLT node, the dynamically learned groups and multicast routerports are automatically learned on the VLT peer node.VLT and StackingYou cannot enable stacking on switches configured for VLT operation.If you enable stacking on a Dell Networking switch on which you want to enable VLT, you must first removethe unit from the existing stack. After you remove the unit, you can configure VLT on the switch.Virtual Link Trunking (VLT) 1173
