Configuring Loop Protection - HP 3500 Series Advanced Traffic Management Manual

Multiple Instance Spanning-Tree Operation
Loop Protection
3-74

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>]