All packets sent
or received
successfully?
NO
YES
If you suspect or know that you are experiencing packet loss over your
connection, do the following:
1.
LACP mode link aggregates require time to negotiate with the
switch. You might drop some packets during this time.
2.
Check the trunk is configured correctly on the switch. Make sure
that ports connected to the ports on the server are assigned to the
LACP trunk. If the LACP trunk is assigned to any other ports on
the server, this can cause packets to be dropped.
3.
Check the switch port configuration. Remove any port that is not
supposed to be in the trunk.
4.
Verify the link aggregate membership. See the steps for Link
aggregate enabled?. If the number of ports in the link aggregate
is greater than the maximum number of ports in the LACP trunk
on the switch, delete the extra ports from the LACP link aggregate.
Problem still exists?
Report your problem to
HP. See
“Reporting
problems ” (page 83)
.
Solving link aggregate problems (FEC mode)
Link partner
configured?
NO
YES
Verify that the switch is configured correctly. See the appropriate
switch documentation to determine if the switch ports connected to
the server are configured correctly for link aggregation (trunking) and
support the FEC protocol.
Link aggregate
configured?
NO
YES
Verify that the link aggregate is configured by issuing the
nwmgr
command. Link aggregate names begin with lan900 (lan900, lan901,
...) and have the Subsystem as
hp_apa
.
If the link aggregate is not configured, use the System Management
Homepage to configure it. See
“Configuring a link aggregate” (page 34)
for more information.
Link aggregate
configured?
NO
YES
Verify that the link aggregate is configured by issuing the
lanscan
command. Link aggregate names begin with
LinkAgg
.
If the link aggregate is not configured, use SAM to configure it. See
“Configuring a link aggregate” (page 34)
for more information.
Link aggregate
enabled?
NO
YES
Verify that the link aggregate is enabled by issuing the following
command:
# nwmgr -v -I xxx -S apa
where
xxx
is the link aggregate instance number.
If the aggregate is enabled, the
APA State
is Up. This also indicates
that the FEC automatic protocol negotiation was successful.
If the
APA State
is Down, do the following:
1.
Verify that all ports in the aggregate are set to the same mode
using the following command:
# nwmgr -A mode,gc -I xxx -S apa
where
xxx
is the port instance number (for example, 1,4, and 10).
If they are not, use the System Management Homepage (SMH) to
modify the aggregate. See
“Modifying a link aggregate” (page 39)
for more information.
70
Troubleshooting HP APA
