Dell PowerEdge VRTX - Manual (Page 294)

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FILE LOCATION: C:\Users\gina\Desktop\Checkout_new\Dell Plasma\User
Guide\Plasma_UGSwitching_STP.fm
D E L L C O N F ID E N T IA L – P R E L IM I N A RY 4 / 1 8 /1 3 - F O R P R O O F O N LY
• Designated — This port is the interface through which the bridge
is connected to the LAN, which provides the lowest cost path
from the LAN to the Root Bridge.
• Alternate — This port provides an alternate LAG to the root
switch from the root interface.
• Backup — This port provides a backup path to the designated
port. Backup ports occur only when two ports are connected in a
loop by a point-to-point link. Backup ports also occur when a LAN
has two or more connections connected to a shared segment.
• Disabled — This port is not participating in the Spanning Tree.
– Speed — Displays the speed at which the port is operating.
– Path Cost (1-200000000) — Enter the port contribution to the root
path cost. The path cost is adjusted to a higher or lower value, and is
used to forward traffic when a path being rerouted.
– Default Path Cost — Check to use the default path cost.
– Priority — Select the priority value that influences the port choice
when a bridge has two ports connected in a loop. The priority value is
provided in increments of 16.
– Designated Bridge ID — Displays the bridge priority and the MAC
address of the designated bridge.
– Designated Port ID — Displays the designated port’s priority and
interface.
– Designated Cost — Displays the cost of the port participating in the
STP topology. Ports with a lower cost are less likely to be blocked if
STP detects loops.
– Forward Transitions — Displays the number of times the port has
changed from the Forwarding state to Blocking.
– LAG — Displays the LAG to which the port is attached.