Requirements for Configuring VVR in a VCS Environment

• Each node that is part of a particular VCS service group involved in replication must use the same port number for replication. You may need to change this number on some nodes before configuring VVR.
• If a node has more than one network interface card on the same physical network being used for replication, each network interface card must have a different MAC address. This is true for all the nodes at the Primary and Secondary sites.
• This requirement is specific to RVGAgent. VCS requires the noautoimport attribute of the disk group to be set. Perform the following steps before starting the VCS cluster:
1. Check whether the noautoimport attribute is set by issuing the following command:

   # vxprint -l diskgroup

If the output displays the noautoimport attribute in the info field, omit the following step and proceed with cluster services.

2. To set the noautoimport attribute, enter the following commands:

# vxdg deport diskgroup
# vxdg -t import diskgroup

To verify that the noautoimport attribute is set, issue the command as described in step a.

Best Practices for Setting Up the Agents

• Only one DiskGroup and one RVG resource must be present in a service group.
• If a disk group is configured as a DiskGroup resource, then all the RVGs in this disk group must be configured as RVG resources.
• When configuring single-instance failover applications, use the RVG, RVGPrimary, and RVGSnapshot agents.

Best Practices for Setting Up Replication

Refer to the VERITAS Volume Replicator Administrator's Guide.