158 Converged Enhanced Ethernet Command Reference
53-1001762-01
spanning-tree portfast
9
DRAFT: BROCADE CONFIDENTIAL
spanning-tree portfast
Enables the Port Fast feature on an interface to allow the interface to quickly transition to
forwarding state.
Synopsis spanning-tree portfast [bpdu-filter | bpdu-guard]
Operands bpdu-filter Sets the Port Fast BPDU filter for the port.
bpdu-guard Guards the port against the reception of BPDUs.
Defaults Port Fast is disabled.
Command
Modes
Interface configuration mode
Description Use this command to enable the Port Fast feature. This command is is the only for the STP. Port
Fast immediately puts the interface into the forwarding state without having to wait for the
standard forward time. Use the spanning-tree edgeport command for MSTP and RSTP.
Usage
Guidelines
If you enable portfast bpdu-guard on an interface and the interface receives a BPDU, the software
disables the interface and puts the interface in the ERR_DISABLE state.
Examples To enable a port to quickly transition to the forwarding state:
switch(conf-if-te-0/1)#spanning-tree portfast
To set the Port Fast BPDU filter for the port:
switch(conf-if-te-0/1)#spanning-tree portfast bpdu-filter
To guard the port against the reception of BPDUs:
switch(conf-if-te-0/1)#spanning-tree portfast bpdu-guard
See Also spanning-tree portfast bpdu-guard, spanning-tree autoedge