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In the previous video, we already learn how
to configure etherchannel using LACP.

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Now in this video, we are going to learn how
to configure etherchannel using PAGP.

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Let’s just start.

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First, let’s import new switch, let’s
say here we use layer 3 switch, which is 3560.

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Now let’s connecting the new switch to switch 1.

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Here we can see that we have blocking port
in multi layer switch.

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We will configure an etherchannel here soo
all interface will active.

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In this case, we are going to use PAGP.

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Let’s start the configuration, open switch 1,
here we can see that the interface connected

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to multi layer switch is fa0/5 until fa0/7.

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So here interface range fa0/5-7, switchport
mode trunk, remember that we need to configure

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the interface as trunk first before configuring
etherchannel.

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Next let’s configure the etherchannel, so
channel-group and then the id,

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remember that id 1 is already used for interface that connected
to switch 0, so here we can not use 1 anymore,

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let’s say here we will use 2.

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Mode, question mark.

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Here we can see that for PAGP we can use mode
auto or desirable.

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This is same as active and passive in LACP,
auto is waiting for invitation from the neighbor,

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and desirable will invite the neighbor to
activate etherchannel.

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So if desirable meet with auto, the etherchannel
will up, desirable meet with desirable,

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the etherchannel will also up, but if auto meet
with auto, the etherchannel will not up.

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In this case, let’s configure switch 1 to
desirable.

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Okay now we have done configuring etherchannel
in switch 1, next let’s configure etherchannel

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in multi layer switch.

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Here we can see that the interface is fa0/1
until 3.

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No, enable, configure terminal, interface
range fa0/1-3.

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And then switchport mode trunk.

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Okay here we can see that we get an error
“command rejected”.

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Remember that if we configure trunk in multi
layer switch, we must define the encapsulation first.

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So here switchport trunk encapsulation dot1q,
and then switchport mode trunk.

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Okay here we can see that we don’t get an
error anymore.

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Next, let’s configure the etherchannel.

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So here channel-group 2, remember that in
switch1, we use id 2, so here we must use

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id 2.

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Mode, in the switch 1 we use mode desirable,
so here we are free to use desirable again

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or auto.

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In this case we will use desirable again.

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Okay now we have done configuring etherchannel,
fast forward time.

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Here we can see that all of interface is green,
let’s check in switch 1, do show etherchannel

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summary.

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Here we have po2, uppercase s uppercase u,
this is means layer 2 and in use,

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the protocol is pagp, the port is fa0/5 until 7, and all
of the port is P, this is means in port channel.

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Let’s also check in the multi layer switch,
do show etherchannel summary.

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Here we also have po2, uppercase s and uppercase
u, this is means layer 2 and in use, the protocol

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is pagp, and the interface is fa0/1 until
3.

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And all of the interface is in port channel.

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Okay so now the etherchannel between switch 1
and multi layer switch is up.

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Let’s add a pc for testing, connecting the
pc to multi layer switch, and configure the

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ip address, let’s say 192.168.1.3

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Let’s ping from pc 1 to pc , okay success,
from pc 2 to pc 0, also success.

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Okay so now we have done configuring the etherchannel
using PAGP, and the etherchannel is up!

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I think enough for this video

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Thankyou for watching and see you on the next video.