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So let's have a look at spending three to show spending three veal and one notice we see a difference
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here we see a port channel.
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One thing to notice here is notice ports such as gigabit 1 0 1 and 1 0 2 1 0 3 0 point to point spanning
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three links.
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Where's the port.
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Channel is a shared spanning tree link.
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Now for the real world.
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Typically once you've put interfaces into the port channel you do the configuration on the port channel.
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However if you have problems do the configuration in the port channel and then verify back to the configuration
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has also been applied to the physical interfaces.
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If it's not applied to the physical interfaces do the config on both the port channel and to the physical
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interfaces to ensure that the configuration is correct.
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But typically you only need to do the configuration on the port channel so I'll show you that here when
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I do the configuration on the physical interface it's not applied to the port channel but configuration
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applied to the port channel is pushed it down to physical interfaces.
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That's how it should work.
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Sometimes in the real world you'll have problems with that to optimize spending tree.
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What we want to do on those ports is specify spanning tree link type point to point that we'll make
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rapid spending tree converge quicker shared links are typically used down to hosts or to hubs that we've
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got switches here.
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So we want to make the spanning tree link type point to point to make it converge quicker
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so show spanning tree v land one
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Now notice I did the configuration on the physical interfaces what I need to do actually is do that
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on the port channel so spanning tree link type point to point and then I'll do something similar on
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the side interface port.
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Channel One spanning tree link type point to point and let's see if that's made a difference.
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So show spending tree v land one that looks better notice the port channel is showing us point to point.
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OK so this looks good on the side show spanning tree v land one notice on switch to no ports of blocking
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previously one of the ports on switch to was blocking for v land one.
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In other words previously gigabit 1 0 24 was blocking but it's not blocking at the moment because of
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that port is part of the port channel.
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Notice also the cost of the port channel is lower than other physical interfaces because this is a better
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interface.
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It's got 2 gigabit ports that make up the channel rather than just a single gigabit port on the side
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show spanning tree v land 10.
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Now notice here we don't see VLAN 10 propagated across the port channel.
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Again if you have problems like this where configuration is done on the physical interface but is not
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shown on the port channel type of these commands on the port channel.
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So typically once you put your interfaces in a port channel you do the configuration on the port channel
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interface port channel one switch port mode trunk switch port trunk we have to separate encapsulation
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first so switch port trunk encapsulation dot one key switch port mode trunk
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so notice now the configuration is shown on the port channel
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and noticed when I use the command show spending TV Land 10:00 I still don't see the port channel because
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on this side we getting an error with inconsistent port channel information we have to configure the
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commands on the port channel to interface port.
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Channel One switch port trunk encapsulation dot one key switch port mode.
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Trunk
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so we need to ensure that we have the commands on the port channel as well as on the physical interface.
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Once you add your physical interfaces to the port channel you do your configuration on the port channel
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rather than on the physical interfaces so let's verify the port channel by using these show interfaces
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port.
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Channel 1 status command.
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Notice we told at the moment that the port channel is not connected.
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So what I'll do is shutter the interfaces down.
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This is one thing to remember with ported channel.
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It's better to make all your changes while the interfaces are shut down and then no shut to them.
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Once you've completed your changes.
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If you have any inconsistency shutter the interfaces down and bring them up again to double check things.
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OK so let's confirm the configuration on switch one that looks good on switch too.
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We need to make sure that everything is the same.
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So both sides look good there.
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This configuration is configured on both sides
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and the physical interfaces match that configuration on both sides to show spanning tree v land one
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port.
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Channel is forwarding so that's good show spanning tree v land one at the moment.
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We still have a status of learning that should hopefully go to forwarding very soon.
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There you go.
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It's forwarding
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show ether channel
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portal channel shows us that the interfaces are active shows spanning tree v land ten notice now we
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can see that a villain 10 is forwarding on the port channel.
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Same is true for veal and 20 same is true for VLAN 30 and the same is true for veal and 100 on the side
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show spanning tree or veal and 10 still needs to go to forwarding on the side.
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So we need to just give it some time but you can see there is an example 100 is forwarding the 1 is
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forwarding villain 10 is now forwarding a villain 20 is now forwarding and villain 30 is now forwarding
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so on all villains on both sides the switches are forwarding on all ports this is what you want to have
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in the core of your network you don't want to have your course switches blocking blocking ports should
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be on the access switches so as an example on access one shows spanning tree v land one one of the ports
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is blocking and we know which port is blocking its gigabit 1 0 24.
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And the reason why is that we've made call 1 the route called 2 is the backup route so this port should
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be blocking what about 4 VLAN 10 this port is also blocking a veal and 100 twenty three is blocking
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because we made court to the route and we saw the LCD go orange but they've now gone back to Green because
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packet tracer has updated the spending tree network so again we can see that the switch is forwarding
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on all v lands so as I demonstrated in this video you can have problems if there's a mismatch or mis
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configuration between the port channel and the physical interfaces the recommendation is to make sure
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that the configuration is the same on both sides make sure that the configuration of both of the logical
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interface.
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In other words the port channel and the physical interfaces are the same on both sides so make sure
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that this matches this but also make sure that this matches the configuration of the port channel on
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the same switch as well as on the other switch.
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So essentially everything should be a mirror image.
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Make sure that this matches this makes sure that this matches this.
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If you have problems like I had here shut the physical interfaces down confirm all the configuration
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and then no shut the physical interfaces.
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Hope that helps you for both the exam and for the real world.
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