Technical data

BLADE OS 5.0 Command Reference
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 Chapter 4: The Information Menu BMD00142, November 2009
Hello The hello time parameter specifies, in seconds, how often the root bridge
transmits a configuration bridge protocol data unit (BPDU). Any bridge
that is not the root bridge uses the root bridge hello value.
MaxAge The maximum age parameter specifies, in seconds, the maximum time the
bridge waits without receiving a configuration bridge protocol data unit
before it reconfigure the STP network.
FwdDel The forward delay parameter specifies, in seconds, the amount of time
that a bridge port has to wait before it changes from learning state to
forwarding state.
Priority
(port) The port priority parameter helps determine which bridge port becomes
the designated port. In a network topology that has multiple bridge ports
connected to a single segment, the port with the lowest port priority
becomes the designated port for the segment.
Cost The port path cost parameter is used to help determine the designated port
for a segment. Generally speaking, the faster the port, the lower the path
cost. A setting of 0 indicates that the cost will be set to the appropriate
default after the link speed has been auto negotiated.
State The state field shows the current state of the port. The state field can be
either Discarding (DISC), Learning (LRN), or Forwarding (FWD).
Role The Role field shows the current role of this port in the Spanning Tree.
The port role can be one of the following: Designated (DESG), Root
(ROOT), Alternate (ALTN), Backup (BKUP), Disabled (DSB), Master
(MAST), or Unknown (UNK).
Designated Bridge The Designated Bridge shows information about the bridge connected to
each port, if applicable. Information includes the priority (in hexadecimal
notation) and MAC address of the Designated Bridge.
Designated Port The port ID of the port on the Designated Bridge to which this port is
connected.
Type Type of link connected to the port, and whether the port is an edge port.
Link type values are AUTO, P2P, or SHARED.
Table 24 CIST Parameter Descriptions
Parameter Description