HP FlexFabric 12900 series Troubleshooting Manual page 16

Question
Are the peer ports set to the
same link type?
Is a loop present in VLAN
1?
Spanning tree feature
Is the timeout factor
correctly set?
Are ports connected to
end-user devices configured
as edge ports?
Is the spanning tree feature
disabled on ports
connected to devices that
do not support spanning
tree protocols?
Command or method
display current-configuration
interface
loopback-detection global
enable vlan 1
display current-configuration
display current-configuration
interface
display current-configuration
interface
12
Result Remarks
□OK
Make sure the ports
□Not OK
between two devices use the
same link type.
□Not related
□OK
Remove ports from VLAN 1
□Not OK
as needed.
□Not related
HP recommends that you set
□OK
a timeout factor in the range
□Not OK
of 5 to 7 on a stable network
to avoid unnecessary
□Not related
recalculations.
Verify that the output from
the display
current-configuration
interface command contains
the "stp edged-port enable"
□OK
string for ports connected to
end-user devices.
□Not OK
HP recommends that you
□Not related
configure ports connected to
end-user devices (PCs, for
example) as edge ports, or
disable the spanning tree
feature on the ports.
Disable the spanning tree
feature on ports connected
to devices that do not
support spanning tree
□OK
protocols. Make sure the
□Not OK
output from the display
□Not related
current-configuration
interface command contains
the "undo stp enable" string
for these ports.