Veritas Storage Foundation 5.1 SP1 Cluster File System Installation Guide (5900-1510, April 2011)

does not calculate the checksum. Instead, it relies on the TCP checksum
mechanism.
Table 10-4
VVR versions and checksum calculations
VVR calculates checksum
TCP connections?
VVR 5.1 SP1
(DG version >= 150)
VVR prior to 5.1 SP1
(DG version <= 140)
YesSecondaryPrimary
YesPrimarySecondary
YesPrimary and Secondary
NoPrimary and Secondary
Note: When replicating between versions of VVR, avoid using commands associated
with new features. The earlier version may not support new features and problems
could occur.
If you do not need to upgrade all the hosts in the RDS simultaneously, you can
use replication between versions after you upgrade one host. You can then upgrade
the other hosts in the RDS later at your convenience.
Note: If you have a cluster setup, you must upgrade all the nodes in the cluster at
the same time.
Planning and upgrading VVR to use IPv6 as connection protocol
Storage Foundation High Availability supports using IPv6 as the connection
protocol.
This release supports the following configurations for VVR:
■ VVR continues to support replication between IPv4-only nodes with IPv4 as
the internet protocol
■ VVR supports replication between IPv4-only nodes and IPv4/IPv6 dual-stack
nodes with IPv4 as the internet protocol
■ VVR supports replication between IPv6-only nodes and IPv4/IPv6 dual-stack
nodes with IPv6 as the internet protocol
■ VVR supports replication between IPv6 only nodes
■ VVR supports replication to one or more IPv6 only nodes and one or more IPv4
only nodes from a IPv4/IPv6 dual-stack node
Preparing to upgrade Veritas Storage Foundation Cluster File System
Preparing to upgrade
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