Dell Force10 MXL Blade - Virtual LAN (VLAN) Commands

Multiple Spanning Tree Protocol (MSTP) | 345
To change the port cost or priority of an interface, use the following commands:
To view the current values for these interface parameters, use the
show config command from INTERFACE
mode (Figure 19-9).
Configure an EdgePort
The EdgePort feature enables interfaces to begin forwarding traffic approximately 30 seconds sooner. In
this mode, an interface forwards frames by default until it receives a BPDU that indicates that it should
behave otherwise; it does not go through the Learning and Listening states. The
bpduguard
shutdown-on-violation
option causes the interface hardware to be shutdown when it receives a BPDU. When
you only implement
bpduguard, although the interface is placed in an error disabled state when receiving
the BPDU, the physical interface remains up and spanning-tree drops
packets in the hardware after a
BPDU violation. BPDUs are dropped in the software after receiving the BPDU violation. This feature is
the same as PortFast mode in Spanning Tree.
The enabling of BPDU Filtering stops sending and receiving of BPDUs on the port fast enabled ports.
When both BPDU guard and BPDU filter are enabled on the port, BPDU filter takes the higher precedence.
By default, BPDU filtering on an interface is disabled.
To enable EdgePort on an interface, use the following command:
Port Channel with two 10-Gigabit Ethernet interfaces 1800
Port Channel with two 40-Gigabit Ethernet interfaces 600
Task Command Syntax Command Mode
Change the port cost of an interface.
Range: 0 to 2000000
Default: refer to Table 19-2.
spanning-tree msti number cost cost INTERFACE
Change the port priority of an interface.
Range: 0 to 240, in increments of 16
Default: 128
spanning-tree msti number priority priority INTERFACE
Caution: Configure EdgePort only on links connecting to an end station. EdgePort can cause loops if you enable it
on an interface connected to a network.
Task Command Syntax Command Mode
Enable EdgePort on an interface.
spanning-tree mstp edge-port
[bpduguard [shutdown-on-violation]
| bpdufilter]
INTERFACE
Table 19-2. MSTP Default Port Cost Values
Port Cost Default Value