Dell Force10 MXL Blade Reference Manual page 629

Table 34-2. show spanning-tree 0 guard Command Description
Field
Guard Type
Bpdu Filter
spanning-tree 0
Assigns a Layer 2 interface to STP instance 0 and configures a port cost or port priority, or enables
loop guard, root guard, or the Portfast feature on the interface.
Syntax spanning-tree stp-id {cost cost | {rootguard} | portfast [bpduguard [shutdown-on-violation] |
bpdufilter] | priority priority}
To disable the spanning tree group on an interface, use the no spanning-tree stp-id {cost cost |
{rootguard} | portfast [bpduguard [shutdown-on-violation] | bpdufilter] | priority priority} command.
Parameters
stp-id
cost
rootguard
portfast [bpduguard
[shutdown-on-violat
ion] | bpdufilter]
priority
Defaults cost
Command Modes
INTERFACE
Command
Version 8.3.16.1
History
Usage
If you enable
Information
disables the interface and sends a message stating that fact. The port is in ERR_DISABLE mode, yet
appears in the
command, BPDUs are still sent to the CPU.
Description
Type of STP guard configured (Root, Loop, or BPDU guard)
BPDU Filter enabled - Yes, BPDU Filter disabled - No
Enter the STP instance ID. Range: 0
cost Enter the keyword
Range: 1 to 65535
Defaults:
• 40-Gigabit Ethernet interface = 1
• 10-Gigabit Ethernet interface = 2
• Port Channel interface with 40-Gigabit Ethernet = 1
• Port Channel interface with 10-Gigabit Ethernet = 1
Enter the keyword rootguard to enable STP root guard on a port or port-channel
interface.
Enter the keyword portfast to enable Portfast to move the interface into forwarding
mode immediately after the root fails.
Enter the optional keyword bpduguard to disable the port when it receives a BPDU.
Enter the optional keyword shutdown-on-violation to hardware disable an interface
when a BPDU is received and the port is disabled.
Enter the keyword bpdufilter to enable on an interface; it should stop sending and
receiving BPDUs on the port fast enabled ports.
Enter keyword priority followed by a number as the priority.
priority
Range: zero (0) to 15
Default: 8
= depends on the interface type; priority = 8
Introduced on MXL 10/40GbE Switch IO Module
portfast bpduguard
commands as enabled. If you do not enable the
show interface
cost
followed by a number as the cost.
on an interface and the interface receives a BPDU, the software
shutdown-on-violation
Spanning Tree Protocol (STP) | 629