HP StorageWorks Application Recovery Manager Installation and Licensing Guide (T4395-96002, February 2008)

Troubleshooting Installation
Verifying DNS Connections Within Application Recovery Manager Cell
Chapter 5102
Verifying DNS Connections Within
Application Recovery Manager Cell
DNS (Domain Name System) is a name service for TCP/IP hosts. The
DNS is configured with a list of host names and IP addresses, enabling
users to specify remote systems by host names rather than by IP
addresses. DNS ensures proper communication among the members of
the Application Recovery Manager cell.
If DNS is not configured properly, name resolution problems may occur
in the Application Recovery Manager cell and the members will not be
able communicate with each other.
Application Recovery Manager provides the omnicheck command to
verify the DNS connections among the members of the Application
Recovery Manager cell. Although all possible connections in the cell can
be checked with this command, it is enough to verify the connections,
which are essential in the Application Recovery Manager cell, the Cell
Manager to any other member of the cell and vice versa.
Using the omnicheck command
Limitation • The command verifies connections among the cell members only; it
does not verify DNS connections in general.
The omnicheck command resides on the Cell Manager in the
<AppRM_home>\bin directory:
The synopsis of the omnicheck command is:
omnicheck -dns [-host Client | -full] [-verbose]
You can verify the following DNS connections in the Application
Recovery Manager cell using different options:
• To check that the Cell Manager resolves DNS connections to every
Application Recovery Manager client in the cell properly and vice
versa, run:
omnicheck -dns [-verbose]