How to use the "dlpiping" command to test VERITAS Cluster Server heartbeat interfaces
| Article:TECH19998 | | | Created: 2002-01-08 | | | Updated: 2009-01-05 | | | Article URL http://www.symantec.com/docs/TECH19998 |
Problem
How to use the "dlpiping" command to test VERITAS Cluster Server heartbeat interfaces
Solution
The Low Latency Transport (LLT) protocol is a layer 2
communication protocol which lives on the Data Link Provider Interface (DLPI).
The dlpiping utility is provided with the VRTSllt package to test communication
of specific DLPI devices at this level.
Summary:
A
dlpiping server must be configured on one of the NICs to be tested. This server
will reflect packets sent by other DLPI devices attached to the network and
configured in client mode.
Details:
1. On one node in the cluster, perform the following
steps to configure a dlpiping server:
Use
the getmac command to display the MAC address of the device on which the
dlpiping server will be configured. Record this address for use in steps
performed on the client systems. The getmac command takes the form of getmac
<device>:<instance>
# /opt/VRTSllt/getmac /dev/qfe:0
/dev/qfe:0 08:00:20:E7:DE:B2
Configure
the dlpiping server on this interface with the dlpiping command. This command
takes the form of dlpiping -s <device>:<instance>. Note that
this server will run in the foreground (no prompt will be returned). Once
testing is completed, use ^C to stop the server process.
# /opt/VRTSllt/dlpiping -s /dev/qfe:0
At this point, you can configure other nodes in the
cluster as dlpiping clients.
2. Using the MAC address obtained in step 1 above,
perform the following on all nodes to test:
Configure
the dlpiping client to send packets to the dlpiping server configured above. If
communication is successful, you will receive a message indicating that the MAC
address specified is alive:
# /opt/VRTSllt/dlpiping -c /dev/qfe:0 08:00:20:E7:DE:B2
08:00:20:E7:DE:B2 is alive
If
communication is NOT successful, you will receive output indicating there was no
response from the specified MAC address:
# /opt/VRTSllt/dlpiping -c /dev/hme:1 08:00:20:E7:DE:B2
no response from 08:00:20:E7:DE:B2
If
there is no response, there is most likely a problem with your hardware
configuration. For example, you may be using the wrong type of cables for your
environment (ie, standard ethernet cables as opposed to crossover cables) or you
may have the server configured on the wrong Network Interface Card (NIC) (ie,
/dev/qfe:0 instead of /dev/qfe:1). Identify possible configuration errors, and
repeat the steps above.
Thank you.