White Papers

● 10-Gigabit Ethernet interface = 2000
● Port Channel interface with one 10 Gigabit Ethernet = 2000
● Port Channel with two 10 Gigabit Ethernet = 1800
● Port Channel with two 100 Mbps Ethernet = 180000
priority priority Enter keyword priority then a value in increments of 16 as the priority. The
range is from 0 to 240. The default is 128.
Defaults
● cost = depends on the interface type
● priority = 128
Command Modes INTERFACE
Supported Modes Full–Switch
Command
History
Version Description
9.9(0.0) Introduced on the FN IOM.
8.3.16.1 Introduced on the MXL 10/40GbE Switch IO Module.
spanning-tree mstp
Configures a Layer 2 MSTP interface as an edge port with (optionally) a bridge protocol data unit (BPDU) guard, or enables the
root guard or loop guard feature on the interface.
Syntax
spanning-tree mstp {edge-port [bpduguard [shutdown-on-violation]] |
bpdufilter| rootguard}
Parameters
edge-port Enter the keywords edge-port to configure the interface as a multiple spanning
tree edge port.
bpduguard (OPTIONAL) Enter the keyword portfast to enable Portfast to move the
interface into forwarding mode immediately after the root fails.
Enter the keyword bpduguard to disable the port when it receives a BPDU.
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
Supported Modes Full–Switch
Command
History
Version Description
9.9(0.0) Introduced on the FN IOM.
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.
Multiple Spanning Tree Protocol (MSTP) 785