Extreme Networks ExtremeWare XOS Command Reference Manual page 662

ExtremeWare XOS 11.5 supports only the Summit X450 family of switches and the BlackDiamond 8800 series switch.
Commands for Status Monitoring and Statistics
Down—Indicates that the port is down, blocked, or has not received Hello+ messages from its
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peer.
If an ELSM-enabled port does not receive a hello message from its peer before the up timer
expires, the port transitions to the Down state. When ELSM is down, data packets are neither
forwarded nor transmitted out of that port.
Down-Wait—Indicates a transitional state.
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If the port enters the Down state and later receives a Hello+ message from its peer, the port
enters the Down-Wait state. If the number of Hello+ messages received is greater than or equal to
the hold threshold, the port transitions to the Up state. If the number of Hello+ messages received
is less than the hold threshold, the port enters the Down state.
Down-Stuck—Indicates that the port is down and requires user intervention.
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If the port repeatedly flaps between the Up and Down states, the port enters the Down-Stuck
state. Depending on your configuration, there are two ways for a port to transition out of this
state:
By default, automatic restart is enabled, and the port automatically transitions out of this state.
See the command
If you disabled automatic restart, and the port enters the Down-Stuck state, you can clear the
stuck state and enter the Down state by using one of the following commands:
clear elsm ports <portlist> auto-restart
enable elsm ports <portlist> auto-restart
Hello Transmit State—The current state of ELSM hello messages being transmitted. The transmit
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state can be one of the following:
HelloRx(+)—Specifies that the ELSM-enabled port is up and receiving Hello+ messages from its
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peer. The port remains in the HelloRx+ state and restarts the HelloRx timer each time it receives a
Hello+ message. If the HelloRx timer expires, the hello transmit state enters HelloRX(-). The
HellotRx timer is 6 * hello timer, which by default is 6 seconds.
HelloRx(-)—Specifies that the ELSM-enabled port either transitions from the initial ELSM state or
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is up and not receiving hello messages because there is a problem with the link or the peer is
missing.
Hello time—The current value of the hello timer, which by default is 1 second. The hello timer
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indicates the number of seconds between consecutive hello messages.
Hold Threshold—The number of Hello+ messages required by the ELSM-enabled port to transition
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from the Down-Wait state to the Up state within the hold threshold.
Auto Restart—The current state of ELSM automatic restart on the port. The state of Auto Restart can
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be one of the following:
Enabled—If an ELSM-enabled port goes down, ELSM automatically brings up the down port.
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This is the default behavior.
Disabled If an ELSM-enabled port goes down, the port enters and remains in the Down-Stuck
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state until you clear the stuck state.
For more information about automatic restart, see the command
on page
restart
Sticky Threshold—Specifies the number of times a port can transition between the Up and Down
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states. The sticky threshold is not user-configurable and has a default value of 1. That means a port
can transition only one time from the Up state to the Down state. If the port attempts a subsequent
transition from the Up state to the Down state, the port enters the Down-Stuck state.
Sticky Threshold Counter—The number of times the port transitions from the Up state to the Down
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state.
662
enable elsm ports auto-restart
643.
on page 643 for more information.
enable elsm ports auto-
ExtremeWare XOS 11.5 Command Reference Guide