bpdufilter
(OPTIONAL) Enter the keyword
edgeport
to enable edge
port configuration to move the interface into forwarding
mode immediately after the root fails. Enter the keyword
bpdufilter
to stop sending and receiving BPDUs on the
port-fast enabled ports.
shutdown-on-
violation
(OPTIONAL) Enter the keywords
shutdown-on-violation
to hardware disable an interface when a BPDU is received
and the port is disabled.
rootguard
Enter the keyword
rootguard
to enable root guard on an
MSTP port or port-channel interface.
Command
Modes
INTERFACE
Command
History
Version 8.3.16.1
Introduced on the MXL 10/40GbE Switch IO Module.
Usage
Information
On an MSTP switch, a port configured as an edge port immediately transitions to
the forwarding state. Only ports connected to end-hosts should be configured as
an edge port. Consider an edge port similar to a port with
spanning-tree
portfast
enabled.
Root guard and loop guard cannot be enabled at the same time on a port. For
example, if you configure loop guard on a port on which root guard is already
configured, the following error message is displayed:
% Error: RootGuard is
configured. Cannot configure LoopGuard
.
When used in an MSTP network, if root guard blocks a boundary port in the CIST,
the port is also blocked in all other MST instances.
Enabling Portfast BPDU guard and loop guard at the same time on a port results in
a port that remains in a blocking state and prevents traffic from flowing through it.
For example, when Portfast BPDU guard and loop guard are both configured:
• If a BPDU is received from a remote device, BPDU guard places the port in an
err-disabled blocking state and no traffic is forwarded on the port.
• If no BPDU is received from a remote device, loop guard places the port in a
loop-inconsistent blocking state and no traffic is forwarded on the port.
tc-flush-standard
Enable the MAC address flushing after receiving every topology change notification.
Syntax
tc-flush-standard
To disable, use the
no tc-flush-standard
command.
910
Multiple Spanning Tree Protocol (MSTP)