Cluster Server Installation Guide for Solaris x64 5.0 - Storage ...

Preparing to install and configure VCSPerforming pre-installation tasks35Note: If the controller is the supported default, the system finds and registersthe device automatically. To update the system, instead of rebooting, you canrun the devfsadm command.5 Once all systems have booted, use the format(1m) command to verify thateach system can see all shared devices.■■If Volume Manager is being used, the same number of external diskdevices must appear, but device nodes (c#t#d#s#) may differ.If Volume Manger is not being used, the same number of external diskdevices must appear and device nodes must be identical for all deviceson all systems.Enabling communication between systemsWhen you install VCS using the installvcs program, to install and configure the entire cluster at one time, make sure that communication between systems exists. By default the installer uses ssh. You must grant permissions for the system where you run installvcs program to issue ssh or rsh commands as rooton all systems in the cluster. If ssh is used to communicate between systems, it must be configured in a way such that it operates without requests for passwords or passphrases. Similarly, rsh must be configured in such a way to not prompt for passwords.If system communication is not possible between systems using ssh or rsh, you have recourse.See “Performing VCS installation in a secure environment” on page 68.See “Manually installing and configuring VCS” on page 83.Optimizing LLT media speed settings on private NICsFor optimal LLT communication among the cluster nodes, the interface cards oneach node must use the same media speed settings. Also, the settings forswitches or hubs used for the interconnects must match that of the interfacecards. Incorrect settings can cause poor network performance or even networkfailure.Guidelines for setting the media speed of the LLT interconnectsIf you have hubs or switches for LLT interconnects, Symantec recommendsusing the Auto_Negotiation media speed setting on each Ethernet card on eachnode.