HP UX Auto Port Aggregation (APA) Software manual Solving Link Aggregate Problems FEC Mode

All packets sent
or received	NO
successfully?

YES

Problem still exists? Report your problem to HP. See “Reporting Problems ” (page 92).

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.

Solving Link Aggregate Problems (FEC Mode)

Link partner configured?

YES

Link aggregate enabled?

YES

Correct ports in link aggregate?

YES

Verify that the switch is configured correctly. See the appropriate NO switch documentation to determine if the switch ports connected to

the server are configured correctly for link aggregation (trunking) and support the FEC protocol.

Verify that the link aggregate is enabled by issuing the following NO 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.

Verify the ports in the link aggregate by issuing the following NO 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-dportPPA 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