Brocade Multi-Service IronWare Switching Configuration Gui Instrukcja Użytkownika Pobierz pdf (Strona 389)

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Multi-Service IronWare Switching Configuration Guide 359

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802.1s Multiple Spanning Tree Protocol

Setting the MSTP global parameters

MSTP has many of the options available in RSTP as well as some unique options. To configure

MSTP Global parameters for all instances on a device.

Brocade(config)# mstp force-version 0 forward-delay 10 hello-time 4 max-age 12

max-hops 9

Syntax: [no] mstp force-version mode-number forward-delay value hello-time value max-age value

max-hops value

The force-version parameter forces the bridge to send BPDUs in a specific format. You can specify

one of the following mode-number values:

• 0 – The STP compatibility mode. Only STP BPDUs will be sent. This is equivalent to single STP.

• 2 – The RSTP compatibility mode. Only RSTP BPDUS will be sent. This is equivalent to single

STP.

• 3 – MSTP mode. In this default mode, only MSTP BPDUS will be sent.

The forward-delay value specifies how long a port waits before it forwards an RST BPDU after a

topology change. This can be a value from 4 – 30 seconds. The default is 15 seconds.

The hello-time value parameter specifies the interval between two hello packets. The parameter

can have a value from 1 – 10 seconds. The default is 2 seconds.

The max-age value parameter specifies the amount of time the device waits to receive a hello

packet before it initiates a topology change. You can specify a value from 6 – 40 seconds. The

default value is 20 seconds.

The max-hops value parameter specifies the maximum hop count. You can specify a value from 1 –

40 hops. The default value is 20 hops.

Setting ports to be operational edge ports

You can define specific ports as edge ports for the region in which they are configured to connect to

devices (such as a host) that are not running STP, RSTP, or MSTP. If a port is connected to an end

device such as a PC, the port can be configured as an edge port. To configure ports as operational

edge ports enter a command such as the following.

Brocade(config)# mstp admin-edge-port ethernet 3/1

Syntax: [no] mstp admin-edge-port ethernet slot/port

The slot/port parameter specifies a port or range of ports as edge ports in the instance they are

configured in.

Setting point-to-point link

You can set a point-to-point link between ports to increase the speed of convergence. To create a

point-to-point link between ports, use a command such as the following at the Global Configuration

level.

Brocade(config)# mstp admin-pt2pt-mac ethernet 2/5 ethernet 4/5

Syntax: [no] mstp admin-pt2pt-mac ethernet slot/port

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