Transition Networks
S4224 Web User Guide
33558 Rev. C
Page 465 of 669
CIST State
The current STP port state of the CIST port. The port state can be one of the following values:
Learning
,
Forwarding
,
Discarding
.
STP per IEEE 802.1d proceeds through various states to establish the topology.
Learning
: After the Blocking state, ports then enter a Learning phase where they listen to frames
reaching their ports to build the MAC tables on the device. While the port does not yet forward frames
(packets) it does learn source addresses from frames received and adds them to the filtering
database (switching database).
Forwarding
: After the Learning state, the root and designated ports enter the Forwarding state,
while the non-designated ports are set to blocking state. A port receiving and sending data, normal
operation. STP still monitors incoming BPDUs that would indicate it should return to the blocking state
to prevent a loop.
Discarding
: The device is discarding all non-OAMPDUs.
RSTP switch port states include Discarding (no user data is sent over the port), Learning (the port is
not forwarding frames yet, but is populating its MAC-address-table), and Forwarding (the port is fully
operational).
Uptime
The time since the bridge port was last initialized (e.g.,
9d 04:09:48
, or 9 days, 4 hours, 9 minutes
and 48 seconds).
Buttons
Refresh
: Click to refresh the page immediately.
Auto-refresh
: Check this checkbox to enable automatic page refreshes at 3 second intervals.
