Brocade Multi-Service IronWare Switching Configuration Gui Manual de usuario descargar pdf (Pagina 467)

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Multi-Service IronWare Switching Configuration Guide 437

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Configuring RSTP parameters

Syntax: rstp [admin-edge-port] | [admin-pt2pt-mac]

The ethernet slot/portnum parameter specifies the interface used.

The path-cost value parameter specifies the cost of the port’s path to the root bridge. RSTP prefers

the path with the lowest cost. You can specify a value from 1 – 20,000,000. Table 59 shows the

recommended path cost values from the IEEE standards.

The priority value parameter specifies the preference that RSTP gives to this port relative to other

ports for forwarding traffic out of the topology. You can specify a value from 0 – 240, in increments

of 16. If you enter a value that is not divisible by four, the software rounds to the nearest value that

is divisible by four. The default is 128. A higher numerical value means a lower priority; thus, the

highest priority is 8.

Set the admin-edge-port to enabled or disabled. If set to enabled, then the port becomes an edge

port in the domain.

Set the admin-pt2pt-mac to enabled or disabled. If set to enabled, then a port is connected to

another port through a point-to-point link. The point-to-point link increases the speed of

convergence. This parameter, however, does not auto-detect whether or not the link is a physical

point-to-point link.

The force-migration-check parameter forces the specified port to sent one RST BPDU. If only STP

BPDUs are received in response to the sent RST BPDU, then the port will go return to sending STP

BPDUs.

Syslogs for RSTP

By default, syslog messages for RSTP are enabled. To disable syslogs generated by a Topology

Change Notice (TCN) for RSTP, enter the following command.

Brocade(config)# no logging enable rstp tc-rx

Syntax: [no] logging enable rstp tc-rx

TABLE 59 Recommended path cost values of RSTP

Link speed Recommended (default) RSTP

path cost values

Recommended RSTP path cost range

Less than 100 kilobits per

second

200,000,000 20,000,000 – 200,000,000

1 Megabit per second 20,000,000 2,000,000 – 200,000,000

10 Megabits per second 2,000,000 200,000 – 200,000,000

100 Megabits per second 200,000 20,000 – 200,000,000

1 Gigabit per second 20,000 2,000 – 200,000,000

10 Gigabits per second 2,000 200 – 20,000

100 Gigabits per second 200 20 – 2,000

1 Terabits per second 20 2 – 200

10 Terabits per second 2 1 – 20

1 2 ... 462 463 464 465 466 467 468 469 470 471 472 ... 983 984

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