Stacking Link Failure
A stacking link is said to be failed when one of the following
happens:
- The stacking link is physically disconnected.
- The neighbor on a link stops transmitting topology information.
- The link goes down while a node restarts or when it is powered
off.
Based on the stacking topology, the stack behavior changes.
- Ring Topology
- All traffic paths that were directed through the failed link are
redirected. All nodes converge on the new (daisy chain) topology that results from the
link break. The Topology Protocol that determines the stack topology immediately informs
other nodes that a link has failed. Each node starts the process of redirecting traffic
paths.
- Daisy Chain
- A stacking link failure means a severed stack. The Topology Protocol
reports the loss of all nodes in the severed portion. Depending on master capability
configuration and the original location of the backup node, the severed portion may or may
not elect a new master node. If it does, the dual master condition may be in effect.
The show slot {slot {detail}
| detail } command displays the slots
that contain active nodes that are in the severed portion as Empty.
