SPANNING TREE PROTOCOL (STP)

CHAPTER 12: SPANNING TREE PROTOCOL (STP)

forwarding state. The default is 15 seconds, with a range of 4 to 30 seconds.

Root Bridge Hello Time: Indicates the designated root bridge's hello time. Hello information is transmitted every 2 seconds.

Root Bridge Max Age: Indicates the designated root bridge maximum age, after which it discards the information as being old and receives new updates.

These variables can be changed using the “priority”, “cost”, “port” and “timers” commands described later in this chapter.

Example 12-2 illustrates the show stp command with the ports parameter. The variables listed in this example are defined as follows:

Port#: indicates the port number. Value ranges from 01 to max number of ports in the switch

Type: indicates the type of port - TP indicates Twisted Pair

Example 12-1: Viewing STP configuration

ML1200#show stp config

RSTP CONFIGURATION

 

-----------------

 

Rapid STP/STP Enabled(Global) : NO

RSTP/STP Enabled Ports

: 1,2,3,4,5,6,7

Protocol

: Normal RSTP

Bridge ID

: 80:00:00:00:00:00:00:00

Bridge Priority

: 32768

Bridge Forward Delay

: 15

Bridge Hello Time

: 02

Bridge Max Age

: 20

Root Port

: 0

Root Path Cost

: 0

Designated Root

: 80:00:00:00:00:00:00:00

Designated Root Priority

: 32768

Example 12-2: Viewing STP ports

ML1200#show stp ports

STP Port Configuration

-------------------------------------------------------------------------------

Port# Type Priority Path Cost State Des. BridgeDes. Port

-------------------------------------------------------------------------------

01

TP(10/100)

128

100

Disabled

80:00:00:20:06:2b:e1:54

80:01

02

TP(10/100)

128

100

Disabled

80:00:00:20:06:2b:e1:54

80:02

03

100MB

Fiber

128

100

Disabled

80:00:00:20:06:2b:e1:54

80:03

04

100MB

Fiber

128

100

Disabled

80:00:00:20:06:2b:e1:54

80:04

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MULTILINK ML1200 MANAGED FIELD SWITCH – INSTRUCTION MANUAL

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GE ML1200 instruction manual Example 12-1 Viewing STP configuration, Example 12-2 Viewing STP ports