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22 Cards in this Set
- Front
- Back
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STP Convergence Step 1
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Elect the root bridge
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STP Convergence Step 2
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Each non-root selects a root port
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root port
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best path to root bridge
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STP Convergence Step 3
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For every link, one designated port is selected
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STP Convergence Step 4
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All other ports set to blocking
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BPDU
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bridge protocol data units
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All switches examine the _______ in the BPDU
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Bridge ID
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The _____ Bridge ID wins root
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lowest
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Bridge ID =
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2 byte priority field + 6 Byte Mac address + VLAN ID
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Priority can be adjusted in increments of...
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4096
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The default priority is
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32768
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MAC address ends up determining the
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root bridge
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The root bridge can also be set by the
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macro command
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STP Root port tiebreaker process
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Lowest cost path to root device
Lowest sender bridge ID Lowest Port ID |
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STP Port States
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Blocking
Listening Learning Forwarding |
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Blocking Port State time
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20 sec max age
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Listening Port State time
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15 sec
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Listening Port State time
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15 sec
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Total discard datagram state time
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50 sec
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Portfast usage
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edge port, server or workstation
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uplinkfast use
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speeds up convergence at access layer switch when redundant connection lost to distribution layer
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backbonefast use
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Saves on Max Age timer when indirect link failure occurs
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