Brocade Network Advisor SAN User Manual v12.1.0 - Manual (Page 983)

Brocade Network Advisor SAN User Manual 935
53-1002948-01
Spanning Tree Protocol configuration
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4. Select the type of spanning tree protocol from the Spanning Tree list.
5. Select the Enable check box if you want to enable the protocol you selected.
6. Enter a value in the Priority field to identify the root bridge in a spanning tree (instance of STP).
The bridge with the lowest value has the highest priority and is the root. A higher numerical
value means a lower priority; thus, the highest priority is 0. The values range from 0 through
61440 for a Fabric OS device; the default is 32768. The values range from 0 through 65535
for an IronWare device; the default is 32768.
7. Enter the number of seconds a bridge waits (the listen and learn period) before it begins to
forward data packets in the Forward Delay field. The values range from 4 through 30 seconds.
The default is 15 seconds.
8. Enter the number of seconds a root bridge waits before it sends the next BPDU in the Hello
Time field. The values range from 1 through 10 seconds. The default is 2 seconds.
9. Enter the number of seconds a bridge waits for a hello packet from the root bridge before
initiating a topology change in the Max Age field. The values range from 6 through 40 seconds.
The default is 20 seconds.
10. The Force Version list is available only if you selected RSTP. This parameter forces the bridge to
send BPDUs in a specific format. You can enter one of the following values:
• 0: The bridge has been forced to operate in STP default mode.
• 1: The bridge has been forced to operate in RSTP default mode.
11. Specify an interval in the Re-enable Port Interval field, available only if you selected RSTP. This
interval specifies the number of seconds to wait before the port is enabled. The values range
from 10 through 1000000. The default is 300.
12. Click the Re-Enable Port State check box, which is available only if you selected RSTP, to
enable or disable the timeout mechanism for the port.
13. Select the Path Cost option: Standard or Custom, available only if you selected RSTP. The path
cost is the cost of using the port to reach the root bridge. When selecting among multiple links
to the root bridge, STP chooses the link with the lowest path cost and blocks the other paths.
Each port type has its own default STP path cost.
14. Click the right arrow button to move the selected product to the Selected VLANs list.
15. Click OK to launch the Deploy STP dialog box.
TABLE 76 Spanning tree configuration matrix
Target context STP type
IOS VLAN STP, RSTP
IOS Port STP, RSTP
FOS Product STP, RSTP, MSTP
FOS VLAN MSTP
FOS Port STP, RSTP, MSTP
NOS Product STP, RSTP, MSTP, PVST, and RPVST
NOS VLAN MSTP
NOS Port STP, RSTP, MSTP, PVST, and RPVST