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Intersection we are not talking about local or in app or redundancy.
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And we'll talk about spending three protocols in the first chapter take taken over we look to the spanning
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tree in the second day and on talk about spending three types in touch up there.
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We'll talk about the configuration of spending three and in the future.
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We are going to talk about first up redundancy protocols.
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And let's go with this painting.
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Tree the first line is talking about why it's penny tree.
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Either that frames don't have a TTL value so they can move between switches eternally because of that
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you can't face with broadcast storms.
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For example let's say that PC Awam sends broadcast
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to our network because if that's a broadcast pickup artist which takes the packet and flew it from its
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all ports or if it comes to the switch to switch to also takes the pickup and flew it from here.
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And so which three also takes the spika.
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And because of that broken packet.
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This is going to flip is also and other food bill become also on that way.
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And as you can see that meeting face with the broadcast tones to people is it like that because internet
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friends don't have time to leave.
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But the the other thing that we need spending three.
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The other answer to this question is we confess with the unicast topic that frames for example PC I'm
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trying to send the frame to PC to
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switch one knows that PC one is on its fast internet Zoravar import but so the phone has no idea about
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PC because of that.
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So each one will flip the traffic out from its other parts the traffic going that way and it will go
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in this Balzer after pickup loop frame will come to the Sims 2 and switch to us so we will send the
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packet to switch 3 and it will send the packet to Pewsey too.
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But from here we have to send for him to come in to see his.
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So we also sent this packet for him to his to.
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So we are going to face that unicast the liquid frames on the switch.
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I'm sorry PC to so but spending three per pupil is that building a logical loop free topology for Internet
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that works by blocking some of porch swing through protocol ellos that are designed to include redundant
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links to provide automatic backup paths if an active links fails also.
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Listening up we are sending a broadcast again from PC via 3G one takes the traffic and follows it from
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this park and also is going to be a fluke from this book.
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But because of this port is blocked by having three different the traffic will not pass through this
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way and it wont go to the switch three from this May.
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So all in the green traffic will come to the switch three and will effect the PC to
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we are two year olds three patrols in spanning three.
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The first one is the route ports closest port to the route which is reports but please pay attention
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to that closest to the bridge in terms of pepped cause the road bridge which I'm going to tell you about
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this.
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What is Pepperpot.
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And we have also designate ports which mean the boats that are going to have to forwarding the traffic
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and we have none designated port which means a blocked port.
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As you can see that in here first it turns one is blocked.
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So that role is not needed.
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Presence there at 0 2 3 and 4
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are designated ports which continue the forward terrific and
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these are the reports because if they are close to the root page in terms of cost but you.
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So let's take a look to how we can elect the proper age to elect the root bridge into that work.
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We need to define the law was bridge idea to find the bridge idea we are using prewar level you and
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Matt and they're using an system id to support them for STPI.
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But in most cases we are not going to use these you calculate the Berjaya.
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Please keep in mind that before proceeding through volume for sewage is the swan and Brits use spatial
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data friends called BPT you to exchange information about bridge IDs and repair costs.
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So let's take a look at this example and let's try to determine the road bridge.
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The first thing we need to check is priority value as you can see that in the figure priority values
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are same for suites.
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So second thing to check is Mekka address because if we need to find the lowest bridge ID we need to
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find the lowest make up address this image which has the lowest make up this will be our route in scenario.
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If you check here
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this nigga address is 0 0 1 7 0 0 2 4 which is bigger.
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So I estimate that this this is beginning meet with first and I mean this also and this is beginning
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mid 0 0 1.
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This is 7 but this is a day is coming after 9:00 at the hexadecimal format.
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So I'm eliminating this and because of this which has the lowest McCullough's it's the bridge.
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So now let's take a look to the spanning three parts are spanning three path cars spanning three.
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Cost value is inversely proportional to the Associated benefit of the path and therefore pepped with
68
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a low cost value is more preferrable than a path with a high cost value as you can determine from this
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chart to hauliers
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leaks with shows us a lower cost but the K as you can see in the picture in SATB I'm taking a ten g
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per second blink as a cost will be of one.
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And I'm taking a one year goal so it costs a little fun but I'm taking a 10 minute per second which
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is a slower path has a higher cost really as you can see that we have a reverse logic in here.
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So if you check the pet one the cost of pet run is according to the reverse I believe specifications.
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These rollies were way ribeyes Soviero except this one now.
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So let's take a look to the cost of pets one pet one has to first it's in the links
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so it's best value.
78
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It's cost well who is Manti.
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Let's go to the Ped.
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Do we have to face the do links together and we have another face to visit links together.
81
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Which means we are of course full of 19:4 Bob and the whole coast valley of path too is sorted.
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So pet one is pretty per hour path to.
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So we have a question in here which is which is the roots and remind the Paul groves.
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The question is saying that because of the priorities are same
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I need to check the last make up of this
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and lowest Mickolus is on switch 3 0 0 Well Mom
87
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it's 0 or but the top thing is three in here which is the lowest.
88
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And that shows us this is our
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Ruperts
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as I told you that 33 is the lowest which most make out low.
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I couldn't speak so which three is the bridge because it has the lowest neck and priorities equal analysts
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they look to the portraits.
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This is my Ruperts
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the closest port to the rude bridge from a pet costs.
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Valid point of view will be the report for each search.
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For example let's check each one here.
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We have a fast internet pet to get here which means my cost is just like but if I want to get from this
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way I need to pass first Shigo a geological survey and June of last week.
99
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Which means higher costs for me.
100
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And this is the root port for each one and force of for here.
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This is the report and so it's true.
102
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This is the box because this is a Jigar and Gigia and Fest's way but here this is a genuine first rate.
103
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But this path is first and Festac.
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So Jika is Prester.
105
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So this is our road for
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OKB didn't mind our reports.
107
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Please keep in mind that for each segment I should have a designated port.
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And please keep in mind this to my look breeds port ports are always in the designate mark.
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So I'm going to my sewage and writing the poor girls as designate OK
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that's mine.
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Well and what I told you is for each segment for each leg.
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BITTMAN Swades Mishal Hello designate the port so because of this is Ruport in here.
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This is going to be the designated to a here is look at it.
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Now we just need that through mine.
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This toolbox now I'm comparing switch one and switch to I'm going to choose one of these ports as designated.
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And one of these ports will be Nahm designator which means Blug port Jules Verne I'm going to blog.
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I'm comparing these two devices priority and I see that they are saying and secondly I'm comparing their
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mac addresses the lowest Mikka address will not be blocked as you can see in the picture.
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So which one has lower MAC address because of that First-Lieutenant 0 2 or so each one will be designated
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for an this part of the switch to 0 2 will be non designator and block.
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Let's take a look at Spain three types.
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We have.
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We have POAD billion spending three rated spending three rapid turbulence Benni tree and MSCP when me
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take a look at the difference when the
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for S2P 3 calculation is meant for all freelance but four per meal and spanning three three calculation
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is made by is made for Per and MSCP is all of our CCMA exams called solar cycle to the previous the
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period.
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These are Cisco propria pretty technology.
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And that creates separate spanning tree for each wheeler and campaign for them.
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BLOCK balancing for example this port of this image can be a forwarding port for Reno man but Temby
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is blocking for port for we land to as you see that I'm calculating instances separately for each meal.
132
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And let's take a look to the red per and spending three protocol which brought significantly faster
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spank through the convergence of threat topology change four days previous D-plus using edge ports and
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willing types and PTSD create separate spring free for each villain and can perform a lot balancing
135
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and we have some different states and poor roles for STPI and rapid spin to put the code.
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We're just discovering learning and forwarding States for R.S.V.P..
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But we have same old blocking listening learning and forward States for STPI so portals are a route
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designated them blocked for as the B but Aristippus we have room designated alternate backup and disable
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portables or
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and let's take a look to the Reppert previous.
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The plus edge ports switch ports that are not connected with a switch are edge ports as you can see
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in the figure this sewage port is connected to and others which this switchboard also connected to another
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switch.
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But here on here on Connect the Pacific they are just connect to the PC.
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So if there is a change in topology this ports immediately translates to forwarding state and so that
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provides us air plus agents exports don't generate topology chance.
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Wendling Tagus we should spend three part as to define the export configuration Mihir link types R.S.V.P.
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coal's the collection in two or most of it as a link type connection a port that operates in through
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the place much is assumed to be point to point link where yes hotplates port through hop is considered
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a shared part by default.
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As you can see that if I'm talking about the link between two Swiss it's linked by P2P
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if I'm directly connected to a PC from a switchboard it's linked to P2P edge and if I can connect to
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this PC or the hub that means lead pipe share and let's take a look to this spanning three configuration
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now.
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Please keep in mind that the default spending three month is PV as the plus for the Ciscos of its an
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we can't force to a savage to be our group bridge also as you as we talked in the previous slide we
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truly let the rude bridge called topology and let's say the switch to is the wood bridge for the center.
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Other than Coklat and it will take off.
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I just I'm just assuming Rainer let's say it's 3 2 is the root bridge.
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But if I want to force each one to be Rooper H I can use the spelling three Villon one root primary
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comment.
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If I use this comment so which one takes the action and tells the network that hey guys I'm your new
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Roop bridge and Smoochy.
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So which two is who.
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Goodbye.
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I can also lower the priority of the Sichuan to make it look Pritch as you can see the line and I can
167
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also choose a secondary route bridge and the primary route preach Frails.
168
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My second bridge becomes route immediately.
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Clarified the route bridge configuration I'm using Scholl's painting tree will and villain number man.
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Then I issue this on and I see that this bridge is the route that the commander put.
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That means that our route bridge configuration is OK and this bridge this bridge is the route bridge
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and let's take a look at the port first configuration
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as you know that on the airport we could configure port fast and to configure a pulse port fast before
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getting into the interface more and just typing spelling three port fast and BPT you are putting the
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interface into Arab disabled state.
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If a BPU is received on first Internet 0 7 I'm so I can also set to be were enabled by typing spending
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three Lippitt Ugur enable comment
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if I want to use Rapide previous D-plus type of SCDP my configuration will be spending three more rapid
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PBS.
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The
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and we the spanning tree.
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And let's take a look to the first half.
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Redundancy protocols which are designed to protect the default that they use going to subnetwork by
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allowing two or more others to provide backup for that address.
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We have three protocols that's providing this to us.
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They are just happy mirror r.p.m. JVP the European jail BP are all those the scope with the new CCMA
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update so we are not it.
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These proposals will just take a look to the happy hot standby rather particle physicists will propria
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three per the code.
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We have a virtual IP and mac addresses and they shit that mean to us there is another load balancing
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in this protocol.
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And he gave me the final confirmation by using shows them by Colinet for example.
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If I want to configure IP to protect my DFA as you can see that I'm setting the set up one is my good
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way and I'm setting this in the face of this rather tend up to and setting the turned up three to this
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in the face of disruption and I'm setting you a step by IP for these routers and others are sharing
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these IP and these are peace tender where they are if they handle these IP and takes the traffic that
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are destined to site of this you are definitely Frails then by GET THE goes that the operation rather
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with the highest IP address becomes active by default.
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But that election can be modified to be it just not be a priority while the highest priority becomes
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active.
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Please keep in mind that the default priority for HAARP is 100 and two and standby routers exchange
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help pickets each 3 seconds
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and also it's a separate preemption term.
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If my active gateway fails this standby router becomes active and still continue to be active even if
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active router comes back.
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If I use preemption
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and if the standby rather becomes active because of the active rather fails and when that if get they
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comes back and if I'm using preemption activated they will handle that process.
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Preemption will force us to add new age us Sarpy election process and they will renew the process again
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and will be active again.
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And we have the stats of the IP and their initial learn lissom Sprigg standby and the active and here
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is the configuration of DHS R P for example for other awam.
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This is Rodewald.
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We have an IP address hoarded up to which is the IP address of the Teague's 00 interface of the rather
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WA
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and we have a standby IP thirded up WAHM which is being shared by two others.
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And you can also and I'm giving the high priority to this rather and making this active forcing this
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to be active and I'm configuring preemption and let's take a look to the rather to for the geek 00 interface.
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I'm configuring this is going to be Paudie thirty three.
220
00:25:21,940 --> 00:25:31,370
This is the interface of each 00 of rather two and I'm defining the same standby IP address with rather
221
00:25:31,370 --> 00:25:46,440
wan So the gig for the PC is 10 to one which is the standby IP address and these IP address and the
222
00:25:46,440 --> 00:25:53,890
packet sent thing sent to the Ziba others are handled by the activity so that the traffic is flowing
223
00:25:53,930 --> 00:25:54,740
in that way.
224
00:25:55,770 --> 00:26:05,440
Now if rather one Thrale's if there is a problem it rather run rather too informs it and takes the traffic
225
00:26:05,500 --> 00:26:06,460
on itself.
226
00:26:06,610 --> 00:26:16,810
So traffic flows from rather two and we don't have any interruption and all the other one comes back
227
00:26:16,810 --> 00:26:18,560
to work after a while.
228
00:26:21,180 --> 00:26:27,090
Rather one becomes a thief again because Milham we have preemption configure
229
00:26:29,880 --> 00:26:37,710
and 12:5 HRP we are using show Stanback command and we can see the state of the other and if it's active
230
00:26:37,860 --> 00:26:39,310
or standby.
24670
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