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Chapter 5
Using Spanning Tree with VLANs
14.
Go to the 1900 and verify the forwarding port. Change the cost of the
forwarding port to 20, which should make the blocked port the for-
warding port. Type spantree cost 20 from interface configuration
of the forwarding port.
15.
Verify the configuration with the show spantree command and
notice that the blocked port is now forwarding and the forwarding
port has been changed to blocked. Also notice the port costs.
16.
Set the port priority on the forwarding port as well, to make sure that
STP always uses this port to forward, by typing spantree priority
64
from interface configuration, which is half of the 128 default inter-
face priority.
17.
Verify the configuration with the show spantree command.
18.
Create an EtherChannel bundle between your two switches, but
before you do, make sure your port configurations are exactly the
same. Change the 1900 switch back to the default configuration. Type
spantree cost 10
and spantree priority 128 from interface con-
figuration mode. Also, set the duplex of the links to full duplex on
both the 1900 and 5000. Set the 5000 to be 100Mbps as well.
19.
From the 1900 interface configuration mode, type duplex full on
both ports.
20.
From the 5000 series switch, type set port speed 100 and set port
duplex full
from port 1/1 and 1/2.
21.
Set the EtherChannel bundle to on for the 1900 switch by typing
port-channel mode on
from global configuration mode.
22.
From the 5000 series switch, turn on EtherChannel by typing set
port channel 1/1-2 on
.
23.
Verify the EtherChannel bundle by typing show port channel.
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