The state of the ELSM logical link is known as the ELSM link state. The
ELSM link state can be one of the following:
- ELSM is enabled and the ELSM peer ports are up and
communicating
- ELSM is enabled but the ELSM peer ports are not up or
communicating
- ELSM is disabled
View the current state of ELSM on the switch using the
commands:
show elsm
ports all | port_list
show ports {port_list} information
{detail}
If you use the show elsm commands, the following
terms display the ELSM link state:
- Up—Indicates that ELSM is enabled and the ELSM peer ports are up
and communicating; the ELSM link state is up. In the up state, the ELSM-enabled port
sends and receives hello messages from its peer.
- Down—Indicates that ELSM is enabled, but the ELSM peers are not
communicating; the ELSM link state is down. In the down state, ELSM transitions the
peer port on this device to the down state. ELSM blocks all incoming and outgoing
switching traffic and all control traffic except ELSM PDUs.
If ELSM is disabled,
the switch does not display any information.
If you use the show ports {port_list} information {detail} command, the
following columns display the current state of ELSM on the switch:
- Flags
- L—Indicates that ELSM is enabled on the switch
- - —Indicates that ELSM is disabled on the switch
- ELSM
- up—Indicates that ELSM is enabled and the ELSM peer ports are
up and communicating; the ELSM link state is up. In the up state, the ELSM-enabled
port sends and receives hello messages from its peer.
- dn—Indicates that ELSM is enabled, but the ELSM peers are not
communicating; the ELSM link state is down. In the down state, ELSM transitions the
peer port on this device to the down state. ELSM blocks all incoming and outgoing
switching traffic and all control traffic except ELSM PDUs.
- - —Indicates that ELSM is disabled on the switch.
If you specify the optional detail parameter, the
following ELSM output is called out in written explanations versus displayed in a
tabular format:
- ELSM Link State (displayed only if ELSM is enabled on the
switch)
- Up—Indicates that ELSM is enabled and the ELSM peer ports are
up and communicating; the ELSM link state is up. In the up state, the ELSM-enabled
port sends and receives hello messages from its peer.
- Down—Indicates that ELSM is enabled, but the ELSM peers are
not communicating; the ELSM link state is down. In the down state, ELSM transitions
the peer port on this device to the down state. ELSM blocks all incoming and
outgoing switching traffic and all control traffic except ELSM PDUs.
- ELSM
- Enabled—Indicates that ELSM is enabled on the switch
- Disabled—Indicates that ELSM is disabled on the switch
For more information about these show commands, see Displaying ELSM Information.
