Solving Link Aggregate Problems (Lacp Mode) - HP -UX 11i v3 Administrator's Manual

Connection
stays up?
YES
Problem still exists?
Report your problem to
HP. See "Reporting
problems " (page

Solving link aggregate problems (LACP mode)

Link partner
configured?
YES
Link aggregate
configured?
YES
Link aggregate
enabled?
YES
64 Troubleshooting HP APA
If the connection terminates abnormally or a network application
appears to hang, complete the following steps:
NO
1. Test the network to determine whether the problem is on the local
host, remote host, or a host on the path between the two.
2. After you identify the host with the problem, do the following:
a. Confirm that the NIC is properly configured. Verify that the
broadcast address and address mask for the local host are
correct.
b. Make sure the local host's /etc/hosts file has the correct
IP address for the local host.
c. Make sure the cabling from the local host to the network is
intact and properly connected.
d. If connected over a local area network (LAN), verify that the
Address Resolution Protocol (ARP) entries are correct and
83).
that the system is properly connected to the LAN.
e. Check the /var/adm/nettl.LOG000 file to see if there are
any errors (for example, cable disconnection messages).
Format the nettl.LOG000 file using the following command:
# netfmt -N nettl.LOG000
Verify that the switch is configured correctly with the appropriate
ports enabled and autonegotiation set to ON. 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 LACP.
Verify that the link aggregate is configured by issuing the nwmgr
command. Link aggregate names begin with lan900 and have the
NO
Subsystem and Interface Type as hp_apa.
If the link aggregate is not configured, use the System Management
Homepage to configure it. See
for more information.
Verify that the link aggregate is enabled by issuing the following
command:
NO
# nwmgr -v -c lanxxx
where xxx is the link aggregate instance number (for example, 900).
If the aggregate is enabled, the APA State is Up. This also indicates
that any LACP 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 by
using the following command:
# nwmgr -A mode,key -I xxx -S apa
where xxx is the port instance number (for example, 1, 2, or 6).
If they are not, use the System Management Homepage to modify
the link aggregate. See
for more information.
"Configuring a link aggregate" (page 34)
"Modifying a link aggregate" (page 39)