2009-06-03 01:21 AM
I received a question from a customer using Protection Manager DR. He used to configure snapmirror manually, using multipath/failover interface specifications in /etc/snapmirror.conf.
The problem is that PM does not seem to allow the use or creation of aggregated network links as snapmirror.conf does.
Is it still a PM limitation, or is there some workaround?
Thanks in advance
2009-06-03 02:18 AM
No.Its not a limitation of PM.
Use the "hostPreferredAddr1" "hostPreferredAddr2" in the dfm host set command for creating preferred connection
lnx186-101: # dfm host set
Valid options are
hostLoginProtocol Login Protocol
hostPreferredAddr1 Preferred IP address 1
hostPreferredAddr2 Preferred IP address 2
hostPrimaryAddress Primary IP Address
hostRLMAddress Remote Platform Management IP Address
hostConsoleAddress Console Terminal Server Address
cpuTooBusyThreshold Host CPU Too Busy Threshold (%)
cpuBusyThresholdInterval Host CPU Busy Threshold Interval
hostPingMethod Ping Method
hostAdminTransport Administration Transport
hostNdmpLogin NDMP Login
hostNdmpPassword NDMP Password
hostAdminPort Administration Port
hbaportTooBusyThreshold HBA Port Too Busy Threshold (%)
hostAgentCIFSAccount Agent CIFS Account
hostAgentCIFSPassword Agent CIFS Password
perfAdvisorTransport Performance Advisor Transport
prefsnmpVersion Preferred SNMP Version
useHostsEquiv Hosts.equiv Enabled
maxActiveDataTransfers Maximum Active Data Transfers
perfDataExportEnabled Performance Advisor Data Export Enabled
perfAdvisorDisabledCounterGroups Perf Advisor Disabled Counter Groups
defaultvFilerInterface Host vFiler Default Interface
processHostIP Primary IP Address Inconsistency Action
2010-10-19 07:53 PM
If you were to set hostPreferredAddr1 & hostPreferredAddr2 for a PM host, would PM define a muliplex or failover SnapMirror relationship? I don't see anywhere to specifty this in the host options.
2010-10-19 08:37 PM
AFAIK, It's a failover based logic. You can check the following link for more details:
Thanks and regards
2010-10-20 04:52 PM
In our environment we wanted to move all the data over a dedicated vlan so used this feature of DFM. We have set that IP in DFM settings however looking at snapmirror.conf shows that PM used that single IP with multi option to make connection entry.
Don't know why it thinks that with single IP it can create a failover or multiplexing connection but unfortunately that's the reality, hopefully Adai can shed some light on it.
2010-10-20 05:44 PM
Have you tried specifying both HostpreferredAddr1 and HostpreferredAddr2? If for some reason PM is not able to transfer through HostpreferredAddr1, then it would use HostpreferredAddr2. That’s what I meant in my previous post.
Now coming to your point. Did you import these relationships into PM or were they created through PM?
Thanks and regards
2010-10-20 07:10 PM
Yes, its a multi, as when hostpreferredAddr1 is set on both the source and destination filer, and when PM creates a VSM, it makes an entry in the snapmirror.conf of the destination filer as follows,
and when hostpreferredAddr2 is also set on both source and destination IIRC it is used as failover between hostpreferredAddr1 and hostpreferredAddr2 connection. Though I will have to confirm the same.