HP Auto Port Aggregation Administrator's Guide for HP-UX 11i v1 and 11i v2 September 2008

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 92).
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
enabled?
NO
YES
Verify that the link aggregate is enabled by issuing the following
command:
If the aggregate is enabled, the Link Aggregation Mode is
FEC_AUTO. This also indicates that any FEC automatic protocol
negotiation was successful.
If the aggregate is not enabled, do the following:
1. Check the cabling between the NIC and the switch.
2. Verify that the link partner is configured to run the Cisco Fast
EtherChannel protocol. Make any changes, if necessary, and wait
10 seconds. Then, verify that the link aggregate is enabled.
3. Verify that all ports in the aggregate are set to the same mode by
using the following command for each port:
If they are not, use the SAM to modify the link aggregate.
Correct ports in
link aggregate?
NO
YES
Verify the ports in the link aggregate by issuing the following
command:
# lanadmin -x -i linkAggPPA
The Active Ports PPA # entry shows the ports that compose the
link aggregate.
If the link aggregate contains ports that you do not want in the
aggregate, delete the ports by issuing the following command:
# lanadmin -X -d portPPA linkAggPPA
where portPPA can be a list of multiple ports numbers separated by
a space.
If any ports you wanted in the link aggregate are members of another
link aggregate, delete the ports in the other aggregate by issuing the
following command:
Solving HP APA Problems 79