Stp, Rstp, And Mstp Configuration Guidelines And Restrictions; Default Stp, Rstp, And Mstp Configuration; Table 16 Default Stp, Rstp, And Mstp Configuration - Brocade Communications Systems Converged Enhanced Ethernet 8000 Administrator's Manual

For more information on MSTP, see
page 64.

STP, RSTP, and MSTP configuration guidelines and restrictions

Follow these configuration guidelines and restrictions when configuring STP, RSTP, and MSTP:
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Default STP, RSTP, and MSTP configuration

Table 16
TABLE 16
Parameter
Spanning-tree mode
Bridge priority
Bridge forward delay
Bridge maximum aging time
Error disable timeout timer
Error disable timeout interval
Port-channel path cost
Bridge hello time
Flush MAC addresses from the VLAN FDB
Converged Enhanced Ethernet Administrator's Guide
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STP, RSTP, and MSTP configuration guidelines and restrictions

You have to disable one form of xSTP before enabling another.
Packet drops or packet flooding may occur if you do not enable xSTP on all devices connected
on both sides of parallel links.
LAGs are treated as normal links and by default are enabled for STP.
You can have 15 MSTP instances and one MSTP region.
Create VLANs before mapping them to MSTP instances.
The MSTP force-version option is not supported.
For load balancing across redundant paths in the network to work, all VLAN-to-instance
mapping assignments must match; otherwise, all traffic flows on a single link.
When you enable MSTP by using the global protocol spanning-tree mstp command, RSTP is
automatically enabled.
For two or more switches to be in the same MSTP region, they must have the same
VLAN-to-instance map, the same configuration revision number, and the same name.
Spanning Tree topologies must not be enabled on any direct server connections to the
front-end Ten Gigabit Ethernet ports that may run FCoE traffic. This may result in lost or
dropped FCoE logins.
lists the default STP, RSTP, and MSTP configuration.

Default STP, RSTP, and MSTP configuration

"STP, RSTP, and MSTP configuration and management"
Default setting
By default, STP, RSTP, and MSTP are disabled
32768
15 seconds
20 seconds
Disabled
300 seconds
Standard
2 seconds
Enabled
7
on
63