Supported Platforms
Related Documentation
Unblocking an Interface That Receives BPDUs in Error (CLI Procedure)
EX Series switches use bridge protocol data unit (BPDU) protection on interfaces to prevent them from receiving BPDUs that could trigger a spanning-tree misconfiguration. If BPDUs are received on a BPDU-protected interface, the interface either shuts down or transitions to a blocking state and stops forwarding frames. In the latter scenario, after the misconfiguration that triggered the BPDUs being sent to an interface is fixed in the topology, the interface can be unblocked and returned to service.
To unblock an interface and return it to service using the CLI:
- Automatically unblock an interface by configuring a timer
that expires:
[edit ethernet-switching-options]
user@switch# set bpdu-block disable-timeout 30All interfaces on the switch will be re-enabled (unblocked) after the timer expires. However, once an interface on the switch receives a new spanning-tree protocol BPDU, the interface returns to the blocked state.
- Manually unblock an interface using the operational mode
command:
user@switch> clear ethernet-switching bpdu-error interface ge-0/0/6.0This command will only re-enable an interface but the BPDU configuration for the interface will continue to exist unless you remove the BPDU configuration explicitly.
