Cisco CCNP BCMSN Exam Tutorial Spanning Tree Protocol ST 70998

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In-your BCMSN / CCNP exam study, it"s easy-to overlook some of the information on Spanning Tree Protocol (STP). After all, you learned all of that in your CCNA reports, right? Definitely not! While some of the BCMSN content will be a assessment for you, there are some details regarding familiar subjects that you should try to learn. Which includes the timers for STP - Hello Time, MaxAge, and Forward Delay.

You may remember these timers from your CCNA reports too, and you should also remember that these timers should not be changed lightly. Discover more on the affiliated link - Browse this hyperlink: intangible. What you might not have known is that if you decide to change any and many of these timers, that change has to be constructed on the root bridge! The root bridge may advise the nonroot turns of the change via BPDUs.

Hello Time could be the interval between BPDUs, two seconds by default.

Forward Delay will be the period of both the listening and understanding STP stages, using a standard value of 15 seconds.

Maximum Age, described from the switch as MaxAge, may be the timeframe a switch may retain a BPDU"s items before removing it. The standard is 2-0 seconds.

The worthiness of the timers can be changed using the spanning-tree vlan command shown below. Verify the changes together with the show spanning-tree command.

SW1( config )#spanning-tree vlan 1??

forward-time Set the delay for the spanning tr Donna Edwards ee

hello-time Set the interval for your spanning tree

max-age Set the max age interval for the spanning tree

priority Set the bridge priority for that spanning tree

As root root Configure move

SW1( config )#spanning-tree vlan 1 hello-time 5

SW1( config )#spanning-tree vlan 1 max-age 30

SW1( config )#spanning-tree vlan 1 forward-time 2-0

SW1( config )#^Z

SW1#show spanning-tree vlan 1

VLAN0001

Spanning tree enabled protocol ieee

Root IDENTIFICATION Goal 32769

Handle 000f.90e1.c240

This bridge may be the root

Hi Time 5 sec Max Age 30 sec Forward Delay 2-0 sec

Bridge ID Priority 32769 (concern 32768 sys-id-ext 1)

Target 000f.90e1.c240

Hi Time 5 sec Max Age 30 sec Forward Delay 20 sec

Aging Time 300

Program Position Sts Price Prio.Nbr Type

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

Fa0/11 Desg FWD 19 128.11 P2p

Fa0/12 Desg FWD 1-9 128.12 P2p

Again, you need to always simply take great care in changing these timers. Get more on the affiliated web page - Navigate to this URL: next. Should people fancy to discover more on account, there are many resources you might investigate. Those defaults are set for a reason - helping to reduce switching curls!.