Dell 53-1002116-01 Specifying a link type, Enabling port fast STP, Specifying the port priority

Configuring STP, RSTP, or MSTP on CEE interface ports 6

4.Enter the spanning-treecommand to specify the restrictions for an MSTP instance on a CEE interface.

switch(conf-if-te-0/1)#spanning-tree instance 5 cost 3550 restricted-tcn

Specifying a link type

From the CEE interface, use this command to specify a link type. Specifying the point-to-pointkeyword enables rapid spanning tree transitions to the forwarding state. Specifying the shared keyword disables spanning tree rapid transitions. The default setting is point-to-point.

To specify a link type on a CEE interface, perform the following steps from Privileged EXEC mode.

1.Enter the configure terminal command to access global configuration mode.

2.Enter the interface command to specify the CEE interface type and slot/port number.

switch(config)#interface intengigabitethernet 0/1

3.Enter the no shutdown command to enable the CEE interface.

4.Enter the spanning-treecommand to specify the link type on the CEE interface.

switch(conf-if-te-0/1)#spanning-tree link-type shared

Enabling port fast (STP)

From the CEE interface, use this command to enable port fast on an interface to allow the interface to quickly transition to the forwarding state. Port fast immediately puts the interface into the forwarding state without having to wait for the standard forward time.

NOTE

If you enable the portfast bpdu-guardoption on an interface and the interface receives a BPDU, the software disables the interface and puts the interface in the ERR_DISABLE state.

Use the spanning-tree edgeport command for MSTP and RSTP (see “Enabling a port (interface) as an edge port” on page 59).

To enable port fast on the CEE interface for STP, perform the following steps from Privileged EXEC mode.

1.Enter the configure terminal command to access global configuration mode.

2.Enter the interface command to specify the CEE interface type and slot/port number.

switch(config)#interface intengigabitethernet 0/1

3.Enter the no shutdown command to enable the CEE interface.

4.Enter the spanning-treecommand to enable port fast on the CEE interface.

switch(conf-if-te-0/1)#spanning-tree portfast

Specifying the port priority

From the CEE interface, use this command to specify the port priority. The range is 0 through 240 in increments of 16. The default is 128.

Dell Converged Enhanced Ethernet Administrator’s Guide	61
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