When STP UplinkFast is enabled on a switch utilizing the default bridge priority, what will the new bridge priority be changed to?
A.
8192
B.
16384
C.
49152
D.
65535
Explanation:
When you enable spanning-tree UplinkFast on the switch, UplinkFast processing is enabled and the
spanning-tree bridge priority for all VLANs is set to 49152, making it unlikely that the switch will
become the root switch. In addition, the spanning-tree port cost and port-VLAN cost of all ports on the
switch is increased by 3000.
The station_update_rate value in the UplinkFast command represents the number of dummy multicast
packets transmitted per 100 milliseconds (the default is 15 packets per 100 milliseconds) in the event
of a direct link failure.
Use the all-protocols on keywords on switches that have UplinkFast enabled but do not have protocol
filtering enabled, and that are connected to upstream switches in the network that have protocol filtering
enabled. The all-protocols on keywords cause the switch to generate multicasts for each
protocol-filtering group.
On switches with both UplinkFast and protocol filtering enabled, or if no other switches have protocol
filtering enabled, you do not need to use the all-protocols on keywords.