HP-UX VLAN Administrator's Guide, February 2007

Additional Information
Keep in mind the following information when troubleshooting HP-UX VLANs:
• All devices in a VLAN's data path must be VLAN aware (must understand VLAN
membership and formats).
• On a switch or end station, all the frames for a specific VLAN must be either tagged or
untagged.
• Promiscuous-mode characteristics:
— Only one stream can run in the unbound promiscuous mode per physical interface and
all the VLAN interfaces created over it.
— A promiscuous stream on the physical interface detects all the frames transmitted or
received on the physical LAN card port, both tagged and untagged frames.
— A promiscuous stream on a VLAN interface detects tagged frames only with the same
VLAN ID as that of the VLAN interface.
Reporting Problems to HP
When reporting problems to your HP support representative, include the following information:
• A complete description of the problem and any error messages. Include information about
the following:
— All configured interfaces on the local system.
— IP addresses and VLAN information of relevant remote systems.
— Log files, such as /var/adm/syslog/syslog.log.
Include a description of what works, as well as what does not work.
• Configuration files: The contents of the /etc/rc.config.d/vlanconf file on relevant
systems.
• Relevant statistics gathered (using nwmgr -g -c lanVPPA --st).
54 Troubleshooting