HP-UX HB v13.00 Ch-15 - Serviceguard

HP-UX Handbook – Rev 13.00 Page 70 (of 108)
Chapter 15 Serviceguard
October 29, 2013
KERNEL/tools/downloads.htm (HP internal)
dlpiping
http://teams3.sharepoint.hp.com/teams/esssupport/InsideESSSupport/InsideWTEC/HA/Pages/Tools.aspx
(HP internal).
Dlpiping is an unsupported program to help troubleshoot ServiceGuard problems where errors
are reported such as non uniform network connections.
The program sends messages at a link level to check link level connectivity. The advantage that
this program has over linkloop is that it sends real messages with the same sap and snap binding
used by cmclconfd and cmcld, whereas linkloop sends special test packets.
Since real messages are being sent and received the program needs to have a component running
on the system sending and receiving the messages. When connectivity is being checked between
interfaces on a single system this is done via a single instance of the program. When connectivity
is being checked between 2 nodes the program starts another copy of itself on the remote node
after copying itself into /tmp on the remote node. This is handled transparently within the
program and relies on tcp, remsh and rcp working.
Here are the key features of dlpiping:
 sends messages matching the size and binding of cmclconfd or cmcld
 reports network type
 reports original mac address if address downloaded
 checks returned message size
 supports Ethernet, 100VG, Token Ring, FDDI and Fibre Channel
 controllable message timeout
More information can be found at this website:
http://teams3.sharepoint.hp.com/teams/esssupport/InsideESSSupport/InsideWTEC/HA/Pages/Tools-
dlpiping.aspx (HP internal).
Common Issues
This chapter will give us a short overview of the most common Serviceguard issues, divided in
the following groups:
 LVM related problems
 Networking related Problems
 Problems with VxVM Disk Groups
 Further Problems
 Intermittent Cluster Reformations
 Cluster daemon abort with possible node TOC
 Serviceguard Command Problems
Most of them are taken from the daily support work. Hopefully they will help you in finding and
solving your problems.