Spanning tree protocol stp stp often accounts for more than 50 % of the configuration, troubleshooting, and maintenance headaches in real world campus networks especially if they are poorly designed. Free ccnp switching workbook by networkershome pdf slideshare. How stp works video by sikandar shaik dual ccie rs. We will also see how the spanning tree protocol reacts when the topology changes. Spanning tree is effectively disabled in the network. Ccnpv7 switch lab41 stp student network switch computer. The information in this document was created from the devices in a specific lab environment. Spanning tree protocol provides a mechanism for network devices to learn the network topology, elect a root bridge, and selectively block ports to form a loop free spanning tree. Configuring pervlan spanning tree protocol free ccna workbook. The spanning tree protocol stp is a network protocol that builds a loop free logical topology for ethernet networks. Configure sw1, sw2 and sw3 to run rapid pervlan spanning tree protocol. Oct 24, 2017 today we have some free content to offer. Jun 21, 2011 this spanningtree lab teaches you everything you need to know for your ccna exam. Introduction 4 points in this lab we will be using cisco hardware to develop hands on skills in spanning tree and etherchannel technologies on cisco switches.
It is popular to build layer2 networks with redundant network connections to improve reliability, but the redundancy can lead to broadcast storms. The spanning tree protocol, also known as the djistrjas algorithm, is documented in the ieee 802. Understanding spanning tree protocol this section describes how spanningtree features work. Root port the one switch port on each switch that has the best root path cost to the root. Ccnpv7 switch lab41 stp student free download as word doc. Spanning tree protocol spanning tree protocols prevent bridging loops in layer 2 ethernet networks. Configure and troubleshoot cisco spanning tree stp. Spanning tree protocol stp is a layer 2 protocol that runs on bridges and switches.
Stp relies on the exchange of bpdus to maintain a loop free environment. How stp works video by sikandar shaik dual ccie rssp. Configuring rapid pervlan spanning tree protocol free ccna. To maintain a loopfree environment, stp performs the following functions. Spanning tree protocol stp for ccna rs 200125 and icnd2. In exercise 1 we will work on spanning tree fundamentals and manipulation and in exercise 2 we will work on spanning tree etherchannels.
First, it prevents problems caused by loops on a network. Learn what it takes to configure rapid spanning tree protocol rstp on the juniper ex series switches. The spanning tree protocol stp is a network protocol that ensures a loop free topology for any bridged ethernet local area network. The following is a catalog of public facing cisco switching lab scenarios created by other authors that you can download here. This failure creates forwarding loops or stp loops.
Spanning tree protocol overview the plugandplay spanning tree protocol stp, a layer 2 protocol that ensures a loop free topology in bridged lans, has been around for decades. Introduction 4 points in this lab we will be using cisco hardware to develop hands on skills in spanningtree and etherchannel technologies on cisco switches. The main purpose of stp is to ensure that you do not create loops. The latest version of spanning tree is rstp, this is 802. Root selection varies depending on the default bid of each switch. One of the topics on the ccna rs version 3 exam is spanning tree protocol stp. Stp spanning tree protocol automatically removes layer 2 switching loops by shutting down the redundant links. The website was founded in late 2009 with the goal of providing free cisco ccna labs that can be completed using the gns3 platform. We have some costly hardware test tools, but if you company is implementing spanning tree protocol, the chances are you will have any of these tools in ypur lab. It should take about 1 hour to run this experiment. Stp overview stp is a layer 2 link management protocol that prov ides path redundancy while preventing loops in the network. Spanningtree protocol is a link management protocol that provides path redundancy while preventing undesirable loops in the network. A redundant link is usually created for backup purposes. The biggest issue with stp is that some hardware failures can cause it to fail.
Spanning tree protocol views the physical links in an etherchannel as one logical connection. This section describes how spanning tree features work. You are not allowed to use the spanningtree root command. These labs have been created for cisco packet tracer but can be implmented on gns3 or real hardware. To configure switches to run the rapid spanningtree protocol by executing the spanningtree mode rapidpvst in global configuration mode as shown below sw1 con0 is. To configure switches to run the rapid spanningtree protocol by executing the spanningtree mode rapidpvst in global configuration mode as shown below. On each switch, display the spanning tree table with the show spanningtree command. This is spanning tree standard called rapid spanning tree protocol. Its purpose is to extract, from the topology graph a single, nonambiguous, cyclefree sub graph, i. The spanning tree protocol run my experiment on geni. In 2008 free ccna workbook originally started as a sharable pdf but quickly evolved into the largest ccna training lab website on the net. Dec 22, 2012 spanning tree protocol stp stp often accounts for more than 50 % of the configuration, troubleshooting, and maintenance headaches in real world campus networks especially if they are poorly designed. Arista switches support rapid spanning tree, multiple spanning tree, and rapidper vlan spanning tree protocols.
Spanning tree protocol this document descibes spanning tree protocol stp in a wireless environment. Stp configuration lab 1 open the packet tracer scenario. Complex protocol that is generally poorly understood. On each switch, display the spanning tree table with the show spanning tree command. Ccna, ccnp, other, switching, vlan this lab was developed to help you gain a better understanding of how switches work within a redundant network and how spanning tree protocol stp is implemented to prevent bridging loops from forming within the network. But there is a protocol called spanningtree protocol stp that is used to stop switching loops in a layer2. Understanding spanning tree protocol this section describes how spanning tree features work.
A redundant link is an additional link between two switches. Understanding and configuring spanning tree protocol stp on. Before proceeding, save as stp configuration lab1working. Observe and explain the default behavior of spanning tree protocol stp, 802. With each network change, the stp algorithm is run on all switches that have a root port. I will be adding new switching labs as they become available so check back frequently to download the latest additions. Pvst can load balance traffic at layer 2 of the osi model without causing a loop. I e e e s standards are rapid spanning tree protocol rstp and multiple stp mstp. Just like every coin has two sides, a redundant link, along with several advantages, has some disadvantages. How to test spanning tree protocol stp embedded system.
Configuring rapid spanning tree protocol rstp junos. This webcast shows you the stp topics for which youre responsible on the ccna rs 200125 or icnd2 200105. Spanning tree also allows a network design to include backup links providing fault tolerance if an active link fails as the name suggests, stp creates a spanning tree that. Change the hello timer on all switches for vlan 10 to 4 seconds.
We will explore some of the capabilities of this protocol, advantages, and limitations. As layer 2 networks grew, it quickly became evident that a system to prevent loops was needed if lans were to continue to function. It is a free software application that helps network administrators. The ieee spanning tree protocol was first implemented in.
You can build the bpdu packet using the tool and test. Free cisco ccna lab guide pdf from neil anderson esx. Spanning tree was great when it came out in 1990, but there have been a number of changes to networking and a number of changes to spanning tree through the years. Spanning tree protocol stp was developed before switches were created in order to deal with an issue that occurred with networks that were implementing network bridges. Spanning tree protocol port states, stp port states,logical loop free topology,root bridge,forwarding, blocking port,switch priority,32768,lowest mac address,root port, designated port,nondesignated port,disabled port, pdf download, pdf, stp port states pdf.
Ict1010 computer networks 20182019 trimester 2 laboratory 4b. The spanning tree protocol stp is designed to prevent layer 2 loops. Spanning tree protocol in layer 2layer 3 environments. The basic function of stp is to prevent bridge loops and ensuing broadcast radiation. Stp is a layer 2 link management protocol that provides path redundancy while preventing loops in the network. Stp will identify if there are any loops, and then disable or block. Configure and troubleshoot cisco spanning tree stp learn how to configure stp, portfast and bpduguard on cisco switches free ccna course handson lab networking fundamentals switching troubleshooting written by alessandro maggio. Second, when redundant loops are planned on a network, stp deals with remediation of network. This lab will discuss and demonstrate the configuration and verification of rapid spanning tree protocol on the ex3200 series switches. Lab 51 ccnp switch chapter 6 ccnp switch chapter 7 ccnp switch chapter 8. Networks should be designed to reconverge rapidly so that a fault is bypassed fault tolerance is achieved by redundancy.
Jan 18, 2017 spanning tree protocol stp is a layer 2 protocol that runs on bridges and switches. Spanning tree protocol port states best cisco ccna ccnp. Make sure switch grasshopper is the root bridge for vlan 40, switch butterfly should be the backup in case switch butterfly fails. It is a free guide from neil anderson who created a new guide. It is implemented in many current routers, bridges, and switches to provide a loop free network topology. Pervlan spanning tree protocol pvst is maintaining a spanningtree instance for each vlan configured in the network and uses ciscos proprietary isl trunking protocol. Switches running stp will build a map or topology of the entire switching network. In this spanning tree protocol tutorial, i will present in simplest terms the operation of stp and indicate how. Stp configuration lab1 open the packet tracer scenario.
Root selection varies depending on the bid of each switch in your lab resulting in varying outputs. This document descibes spanning tree protocol stp in a wireless environment. Stp defines a tree with a root device and a loop free path from the root to all infrastructure devices in the layer 2 network. The basic function of stp is to prevent bridge loops and the broadcast radiation that results from them. Spanning tree protocol stp spanning tree protocol stp was developed to prevent the broadcast storms caused by switching loops. Configuring pervlan spanning tree protocol free ccna.
Spanning tree protocol stp was developed to prevent the broadcast storms caused by. Stp switches exchange bridge protocol data units bpdus to build the. Which statement is true about the spanning tree protocol stp. Nov 16, 2016 one of the topics on the ccna rs version 3 exam is spanning tree protocol stp. Rapid for being a fast version of spanningtree protocol and it was labeled as 802. In exercise 1 we will work on spanningtree fundamentals and manipulation and in exercise 2 we will work on spanningtree etherchannels. Ccnp switch chapter 4 exam answers version 7 score 100%. Spanning tree protocol port states best cisco ccna ccnp and. These sections describe the arista spanning tree protocol implementation. Digital equipment corporation created a protocol called spanning tree protocol stp to prevent broadcast storms and network loops at layer 2. So weve seen a few now in the cisco curriculum, 802.
Introduction to stp, spanning tree protocol, broadcast storm, topological loop, switch macaddress table corruption,stp pdf file download, pdf file download, ethernet bridge, ethernet switch,layer 2 topological loop,ieee 802. In this lab, you will discover the spanning tree protocol, which is specified in the ieee 802. Spanningtree protocol enhancements using loop guard and. Cisco ccnp switch spanning tree protocol stp cisco ccnp switch rapid spanning tree protocolrstp root bridge in rstp is elected just like 802. Spanning treeenabled switches go through a root election process based on bridge p rotocol data unit. Before proceeding, save as stp configuration lab 1working. Cisco saw the need for spanning tree on all vlans and create the proprietary pvst and. Stp spanning tree protocol explained with examples. This will be discussed in lab 415 configuring multiple spanning tree protocol. After all switches agree on the root, the following port roles are determined.
Spanning tree protocol stp resolves physically redundant topologies into loop free, treelike topologies. Configuring rapid pervlan spanning tree protocol free. Free cisco lab packet tracer activity basic stp posted by. Then, we will see how the spanning tree protocol creates a loop free logical topology in a network with physical loops, so that a broadcast storm cannot occur.
607 207 31 334 143 845 809 465 1520 329 846 316 1223 135 500 997 202 288 1573 463 302 866 1213 918 963 94 651 707 292 508 447 1037 20 1597 1464 1617 687 153 1193 636 150 461 900 977 203 974 370 49 596