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4-10 C
HAPTER
4: M
ONITORING
DUA1860-0AAA01
Listening
means that the port is preparing to enter the active
topology. At this point the port is not used for bridging packets,
but C-BPDUs are received and transmitted on it, and it is included
in the spanning tree calculations. If, after a predetermined
amount of time, no information has been received indicating that
the port should be blocked, the port passes into the learning
state.
Learning
means that the port is one step closer to bridging
packets. Since the active topology may still be changing, a port in
this state receives packets but does not bridge them. However,
because the active topology is more stable than when the port is
in the listening state, the port participates in the learning process
of its bridge. In the learning process, the bridge associates the
source address of each packet it receives with the identifier of the
port on which it received the packet.
Rcvd
Pkts:
Display Field. The number of packets received by the port.
Bytes:
Display Field. The number of bytes received by the port.
Errors:
Display Field. The number of packets with errors, received
by the port.
Overruns:
Display Field. Due to exceptional loading conditions,
the bridge has become overloaded and packets have been lost.
Xmit
Pkts:
Display Field. The number of packets transmitted by the
port.
Bytes:
Display Field. The number of bytes transmitted by the
port.
Errors:
Display Field. The number of packets with errors,
transmitted by the port.