Technical data

Fabric OS Encryption Administrator’s Guide (DPM) 191
53-1002720-02
SRDF/TF/RP manual rekeying procedures
3
6. After confirming that the rekey has completed on the source LUN, perform the following to
re-establish the source-to-target LUN replication:
a. Remove the target LUN access by disabling all remote site target ports with access to the
target LUN.
NOTE
In environments in which the target ports through which the target LUNs are accessible
cannot be taken offline because they are used to access other LUNs, before remote
access to the R2 LUNs is established, the refreshDEK command must be issued for all
CTCs associated with the remote LUNs after the source LUNs have been rekeyed and
synchronized with their target LUNs.
b. Re-establish the SRDF R1/R2 LUN pair so that the rekeyed data from the source LUN is
copied to the target LUN.
c. Verify that the SRDF pair is in a fully synchronized state using the EMC Solution Enabler.
d. Verify that the DEKs are synchronized between the local and remote DPMs. This can be
done manually for each LUN as follows:
1. Issue the cryptocfg
--show -vendorspecifickeyid key_ID command for each
replicated LUN and capture the UUIDs (Universally Unique Identifier) returned.
2. Search for this UUID on the remote DPMs to ensure its presence.
Alternatively, simply bringing the remote site LUNs online to the remote EEs ensures that
the remote DEKs are present. To bring the remote LUNs online use following steps:
1. Restore target LUN access by enabling all remote site target ports (associated with
remote site CTCs) with access to the target LUN.
2. Verify that the remote LUN states are encryption enabled and their key IDs used for
encryption are the same as those used by the local site LUNs.
3. Take all target ports associated with CTCs through which the remote LUNs are
accessible offline.
NOTE
If the DEK is not synchronized between the local and remote sites, the remote LUN will
automatically become disabled.
Rekeying LUNs for RP deployments - local site
Manual rekeying is supported for RP source LUNs. If it is required to rekey the remote LUN, RP role
reversal/swap is necessary as described in “Rekeying LUNs for RP deployments - remote site”.
1. Log in as Admin or FabricAdmin.
2. Disable the RP source/target LUN consistency group, ensuring that the data replication from
the source LUN to the destination LUN has been stopped.
NOTE
During all rekeying operations, data replication between the source and target LUN must be
stopped.