H3C S12500G-AF Series Troubleshooting Manual page 16

Question
Fiber ports
Do the ports at the two
ends use the same port
settings?
Are CRC errors present on
any fiber port? Is the
number of CRC errors
increasing?
Trunk port configuration
Do the peer trunk ports use
the same PVID?
Are the peer ports
assigned to the same
VLANs?
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?
Command or method
display
current-configuration
interface
display interface
display
current-configuration
interface
display
current-configuration
interface
display
current-configuration
interface
loopback-detection
global enable vlan 1
display
current-configuration
display
current-configuration
interface
12
Result Remarks
the peer port.
To connect an H3C device
□OK
to a device from another
vendor, set the same port
□Not OK
rate
□Not related
settings at the two ends as
a best practice.
If CRC
□OK
replace
□Not OK
module or pigtail fiber, or
clean
□Not related
module connector.
□OK
Make sure the same PVID
□Not OK
is configured on the trunk
ports between two devices.
□Not related
Make sure the trunk ports
between two devices are
assigned
□OK
VLANs.
□Not OK
For example, if you assign
□Not related
a trunk port to all VLANs,
also assign its peer port to
all VLANs.
□OK
Make
□Not OK
between two devices use
the same link type.
□Not related
□OK
Remove ports from VLAN 1
□Not OK
as needed.
□Not related
As a best practice to avoid
□OK
unnecessary
recalculations,
□Not OK
timeout factor in the range
□Not related
of 5 to 7 on a stable
network.
Verify that the output from
the
current-configuratio
n interface command
contains
□OK
edged-port
□Not OK
string for ports connected
to end-user devices.
□Not related
As
configure ports connected
to end-user devices (PCs,
for example) as edge ports,
or disable the spanning
and duplex mode
errors persist,
the transceiver
the transceiver
to the same
sure the ports
set a
display
the " stp
enable "
a best practice,