Vlt Bandwidth Monitoring; Vlt And High Availability; Vlt And Igmp Snooping; Vlt And Stacking - Dell C9000 Series Networking Configuration Manual

VLT Bandwidth Monitoring

When bandwidth usage of the VLTi (ICL) exceeds 80%, a syslog error message (shown in the following
message) 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 status

VLT and High Availability

High availability (HA) support on VLT ensures seamless and uninterrupted flow of VLT features during RPM
failure (failover).
When RPM failover happens, the new active RPM triggers a new VLT registration to its VLT peer. It ensures
that the VLT node with new active RPM receives all the VLT information from its VLT peer. When the standby
RPM performs the check-in and registration function (with the active RPM), the latter performs a bulk
synchronization of all the peer VLT information. The existing CLI configuration synchronized to the standby
RPM ensures that the local VLT configurations are always available at standby RPM as well. The VLT backup
link functionality is also modified to manage the two management interfaces in a dual RPM. A virtual
management IP must be configured on the dual RPM VLT node to maintain uninterrupted VLT backup
functionality. For more information, refer to "VLT backup link" section in the Configuration Notes

VLT and IGMP Snooping

When configuring IGMP Snooping with VLT, ensure the configurations on both sides of the VLT trunk are
identical 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 router
ports are automatically learned on the VLT peer node.

VLT and Stacking

You 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 remove
the unit from the existing stack. After you remove the unit, you can configure VLT on the switch.
Virtual Link Trunking (VLT) 1173