Brocade 6910 Ethernet Access Switch Configuration Guide (Supporting R2.2.0.0) - Manual (Page 389)

Brocade 6910 Ethernet Access Switch Configuration Guide 333
53-1002651-02
18
Spanning Tree Commands
Command Mode
Global Configuration
Command Usage
This command sets the maximum time (in seconds) a device can wait without receiving a
configuration message before attempting to reconverge. All device ports (except for designated
ports) should receive configuration messages at regular intervals. Any port that ages out STA
information (provided in the last configuration message) becomes the designated port for the
attached LAN. If it is a root port, a new root port is selected from among the device ports attached
to the network.
Example
Console(config)#spanning-tree max-age 40
Console(config)#
Related Commands
“spanning-tree forward-time” on page 331
“spanning-tree hello-time” on page 332
spanning-tree mode
This command selects the spanning tree mode for this switch. Use the no form to restore the
default.
Syntax
spanning-tree mode {stp | rstp | mstp}
no spanning-tree mode
stp - Spanning Tree Protocol (IEEE 802.1D)
rstp - Rapid Spanning Tree Protocol (IEEE 802.1w)
mstp - Multiple Spanning Tree (IEEE 802.1s)
Default Setting
rstp
Command Mode
Global Configuration
Command Usage
• Spanning Tree Protocol
This option uses RSTP set to STP forced compatibiltiy mode. It uses RSTP for the internal state
machine, but sends only 802.1D BPDUs. This creates one spanning tree instance for the entire
network. If multiple VLANs are implemented on a network, the path between specific VLAN
members may be inadvertently disabled to prevent network loops, thus isolating group
members. When operating multiple VLANs, we recommend selecting the MSTP option.