Users Guide

Stack#show system stack-unit 2 | grep priority
Master priority : 0
Example of Adding a Standalone with a Lower MAC Address and Equal Priority to a Stack
Stacking LAG
When multiple links are used between stack units, Dell Networking OS automatically bundles them in a stacking LAG to provide
aggregated throughput and redundancy.
The stacking LAG is established automatically and transparently by Dell Networking OS (without user configuration) after peering is
detected and behaves as follows:
• The stacking LAG dynamically aggregates; it can lose link members or gain new links.
• Shortest path selection inside the stack: If multiple paths exist between two units in the stack, the shortest path is used.
Supported Stacking Topologies
The device supports stacking in a ring or a daisy chain topology.
Dell Networking recommends the ring topology when stacking the switches to provide redundant connectivity.
Figure 120. Supported Stacking Topologies
High Availability on Stacks
Stacks have master and standby management units analogous to Dell Networking route processor modules (RPM).
The master unit synchronizes the running configuration and protocol states so that the system fails over in the event of a hardware or
software fault on the master unit. In such an event, or when the master unit is removed, the standby unit becomes the stack manager and
Dell Networking OS elects a new standby unit. Dell Networking OS resets the failed master unit: after online, it becomes a member unit;
the remaining members remain online.
Example of Stack Manager Redundancy
Dell#show redundancy
-- Stack-unit Status --
750
Stacking