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Configuring RSTP parameters 13
Therefore, during RSTP deployment you may find that though a LAG has greater bandwidth, its in
blocking/discarding state as its pathCost is same as any 1G link and the portIndex of 1G port is
lower, making the LAG go into a blocking/discarding state. This behavior is not restricted to 1G or
10G link speed but span across different link speeds. The same behavior also holds TRUE for STP
deployments.
Enabling or disabling RSTP in a port-based VLAN
Use the following procedure to disable or enable RSTP on a Brocade device on which you have
configured a port-based VLAN. Changing the RSTP state in a VLAN affects only that VLAN.
To enable RSTP for all ports in a port-based VLAN, enter commands such as the following.
Brocade(config)# vlan 10
Brocade(config-vlan-10)# rstp
Syntax: [no] rstp
Enabling or disabling RSTP on a single spanning tree
To globally enable RSTP for all ports of a single spanning tree, enter the following command.
Brocade(config)# rstp single
Syntax: [no] rstp single
Disabling or enabling RSTP on a port
The rstp command must be used to initially enable RSTP on ports. Both commands enable RSTP on
all ports that belong to the VLAN or to the single spanning tree.
Once RSTP is enabled on a port, it can be disabled on individual ports. RSTP that have been
disabled on individual ports can then be enabled as required.
NOTE
If you change the RSTP state of the primary port in a LAG group, the change affects all ports in that
LAG group.
To disable or enable RSTP on a port, enter commands such as the following.
Brocade(config)# interface 1/1
Brocade(config-if-e1000-1/1)# no spanning-tree
Syntax: [no] spanning-tree
Changing RSTP bridge parameters
When you make changes to RSTP bridge parameters, the changes are applied to individual ports
on the bridge.
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