Ccna Pcg Ch 14: Stp And Etherchannel

Front 1

spanning-tree vlan 5

Back 1

Enables STP on VLAN 5

Front 2

Switch(config)#no spanning-tree vlan 5

Back 2

Disables STP on VLAN 5

Front 3

Switch(config)#spanning-tree vlan 5 root

Back 3

Modifies the switch priority from the default 32768 to a lower value to allow the switch to become the root switch for VLAN 5

Front 4

Switch(config)#spanning-tree vlan 5 root primary

Back 4

Switch recalculates timers along with priority to allow the switch to become the root switch for VLAN 5.

Front 5

Switch(config)#spanning-tree vlan 5 root primary diameter 7

Back 5

Configures the switch to be the root switch for VLAN 5 and sets the network diameter to 7.

Front 6

Switch(config)#spanning-tree vlan 5 root primary hello-time 4

Back 6

Configures the switch to be the root switch for VLAN 5 and sets the hello-delay timer to 4 seconds

Front 7

Switch(config)#spanning-tree vlan 5 root secondary

Back 7

Switch recalculates timers along with priority to allow the switch to become the root switch for VLAN 5 should the primary root switch fail

Front 8

Switch(config)#spanning-tree vlan 5 root secondary diameter 7

Back 8

configures the switch to be the secondary root switch for VLAN 5 and sets the network diameter to 7

Front 9

Switch(config)#spanning-tree vlan 5 root secondary hello-time 4

Back 9

configures the switch to be the secondary root switch for VLAN 5 and sets the hello-delay timer to 4 seconds

Front 10

Switch(config-if)#spanning -tree port-priority 64

Back 10

Configures the port priority for the interface that is an access port.

Front 11

Switch(config-if)#spanning-tree vlan 5 port-priority 64

Back 11

configures the VLAN port priority for an interface that is a trunk port

Front 12

Switch(config-if)#spanning-tree cost 100000

Back 12

Configures the cost for the interface that is an access port.

Front 13

Switch(config-if)#spanning-tree vlan 5 cost 1000000

Back 13

Configures the VLAN cost for an interface that is a trunk port.

Front 14

Switch(config)#spanning-tree vlan 5 priority 12288

Back 14

Configures the switch priority of VLAN 5 to 12288

Front 15

Switch(config)#spanning-tree vlan 5 hello-time 4

Back 15

Changes the hello-delay timer to 4 seconds on VLAN 5

Front 16

Switch(config)#spanning-tree vlan 5 forward-time 20

Back 16

Changes the forward-delay timer to 20 seconds on VLAN 5

Front 17

Switch(config)#spanning-tree vlan 5 max-age 25

Back 17

Changes the maximum-aging timer to 25 seconds on VLAN 5

Front 18

Switch#show spanning-tree

Back 18

Displays STP information

Front 19

Switch#show spanning-tree active

Back 19

Displays STP information on active interfaces only

Front 20

Switch#show spanning-tree brief

Back 20

Displays a brief status of the STP

Front 21

Switch#show spanning-tree detail

Back 21

Displays a detailed summary of the interface information

Front 22

Switch#show spanning-tree interface gigabitethernet 0/1

Back 22

Displays STP information for interface gigabitethernet 0/1

Front 23

Switch#show spanning-tree summary

Back 23

Displays a summary of port states

Front 24

Switch#show spanning-tree summary totals

Back 24

Displays the total lines of the STP section

Front 25

Switch#show spanning-tree vlan 5

Back 25

Displays STP information for VLAN 5

Front 26

Switch(config-if)#spanning-tree portfast

Back 26

Enables PortFast on an access port.

Front 27

Switch(config-if)#spanning-tree portfast trunk

Back 27

Enables PortFast on a trunk port.

Front 28

Switch(config-if)#spanning-tree interface fastethernet 0/10 portfast

Back 28

Displays PortFast information on interface fastethernet0/10

Front 29

Switch(config)#spanning-tree portfast bpduguard default

Back 29

Globally enables BPDU Guard

Front 30

Switch(config)#errdisable recovery cause bpduguard

Back 30

Allows port to reenable itself if the cause of the error is BPDU Guard by setting a recovery timer.

Front 31

Switch(config)#errdisable recovery interval 400

Back 31

Sets recovery timer to 400 seconds. The default is 300 seconds. The range is from 30 to 86400 seconds.

Front 32

Switch#show spanning-tree summary totals

Back 32

Verifies whether BPDU Guard is enabled or disabled

Front 33

Switch#show errdisable recovery

Back 33

Displays errdisable recovery timer information

Front 34

Switch(config)#spanning-tree mode mst

Back 34

Enables MSTP. This command is available only on a switch running the EI software image.

Front 35

Switch(config)#spanning-tree mode pvst

Back 35

Enables PVST. This is the default setting.

Front 36

Switch(config)#spanning-tree mode rapid-pvst

Back 36

Enables Rapid PVST+.

Front 37

Switch(config)#spanning-tree extend system-id

Back 37

Enables extended system ID, also known as MAC address reduction

Front 38

Switch#show spanning-tree summary

Back 38

Verifies extended system ID is enabled

Front 39

switch(config-if)#spanning-tree link-type point-to-point

Back 39

Sets the interface to be a point-to-point interface

Front 40

Switch#debug spanning-tree all

Back 40

Displays all spanning-tree debugging events

Front 41

Switch#debug spanning-tree events

Back 41

Displays spanning-tree debugging topology events

Front 42

Switch#debug spanning-tree backbonefast

Back 42

Displays spanning-tree debugging BackboneFast events

Front 43

debug spanning-tree uplinkfast

Back 43

Displays spanning-tree debugging UplinkFast event

Front 44

Switch#debug spanning-tree mstp all

Back 44

Displays all MST debugging events

Front 45

Switch#debug spanning-tree switch state

Back 45

Displays spanning-tree port state changes

Front 46

Switch#debug spanning-tree pvst+

Back 46

Displays PVST+ events

Front 47

Switch(config-if-range)#channel-protocol pagp

Back 47

Specifies the PAgP protocol to be used in this channel.

Front 48

Switch(config-if-range)#channel-protocol lacp

Back 48

Specifies the LACP protocol to be used in this channel.

Front 49

Switch(config-if-range)#channel-group 1 mode {desirable | auto | on | passive | active }

Back 49

Creates channel group 1 and assigns interfaces 01-04 as part of it. Use whichever mode is necessary, depending on your choice of protocol

Front 50

Switch#show etherchannel

Back 50

Displays all etherchannel information

Front 51

Switch#show etherchannel summary

Back 51

Displays a summary of EtherChannel information

Front 52

Switch#show etherchannel 1 port-channel

Back 52

Displays port channel information

Front 53

Switch#show pagp neighbor

Back 53

Shows PAgP neighbor information

Front 54

Switch#clear pagp 1 counters

Back 54

Clears PAgP channel group 1 information

Front 55

Switch#clear lacp 1 counters

Back 55

Clears LACP channel group 1 information