Answers to Written Lab
177
Answers to Written Lab
1.
show spantree
. This command will display the spanning tree infor-
mation of a VLAN and all the ports' participation in STP.
2.
set spantree disable 5
. The set spantree command is used to
enable or disable spanning tree for a VLAN.
3.
spantree 6
. This command is used to turn on spanning tree for a
VLAN. You can disable STP for an interface with the no spantree
command.
4.
32768. This is the default priority on all switches and bridges.
5.
Bridge priority and then MAC address. If the priorities of the switches
are set the same, the MAC address would be used to determine the
bridge ID.
6.
Two seconds. Every two seconds, BPDUs are sent out all forwarding
ports.
7.
Fifty seconds. From blocking to listening is 20 seconds. From listening
to learning is 15 seconds, and from learning to forwarding is another
15 seconds.
8.
Blocking, listening, learning, forwarding. Each state is used to stop
network loops from occurring on redundant links.
9.
The path cost and port ID are used to determine the designated port
and nondesignated ports.
10.
True. Bridges forward all frames that are received and are broadcasts
or are not in the filter table.
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