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Multiple Instance Spanning-Tree Operation
Loop Protection
Configuring Loop Protection
Loop protection provides protection against loops by transmitting loop
protocol packets out of ports on which loop protection has been enabled.
When the switch sends out a loop protocol packet and then receives the same
packet on a port that has a receiver-action of send-disable configured, it shuts
down the port from which the packet was sent.
Syntax: [no] loop-protect <port-list> [receiver-action <send-disable | no-disable>] |
[transmit-interval <1-10>] | [disable-timer <0-604800>] | [trap loop-detected]
[mode <port | vlan>] <vlan <vid-list>>]
Allows you to configure per-port loop protection on the switch.
[receiver-action <send-disable | no-disable>]
Sets the action to be taken when a loop is detected on the
specified port or ports. The port that receives the loop protec-
tion packet determines what action is taken. If send-disable
is configured, the port that transmitted the packet is disabled.
If no-disable is configured, the port is not disabled when a
loop is detected.
Note: The port will not transmit loop protection packets
unless it is a member of an untagged VLAN. If a port is only
a member of tagged VLANs, the loop protection packets are not
transmitted.
Default: send-disable
[trap loop-detected]
Allows you to configure loop protection traps for SNMP
indicating when a loop has been detected on a port.
[disable-timer <0-604800>]
How long (in seconds) a port is disabled when a loop has been
detected. A value of zero disables the auto re-enable function.
Default: Timer is disabled
[transmit-interval <1-10>]
Allows you to configure the time in seconds between the
transmission of loop protection packets.
Default: 5 seconds
[mode <port | vlan>]
Configure loop protection in port or VLAN mode.
[vlan <vlan-id-list>]
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