HP StorageWorks 2/140 FW 07.01.02/HAFM SW 08.06.00 HP StorageWorks HA-Fabric M - Page 24

Known issues, Setting date/time of HAFM appliance to earlier time may cause loss

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The issue arises because either LAN connection on the HAFM appliance can be the public LAN or the private LAN. Though the directors and edge switches can be managed via either LAN, the public LAN is the only one that can support remote client access. Thus, if one attempts to access the HAFM appliance via a remote client session and is unknowingly using what has been designated as the private LAN, the remote session is not allowed. The IP address that the HAFM appliance has determined to be the public LAN which supports remote client access, displays HAFM which displays after selecting SAN > Server Properties. HAFM designates the public LAN as the first LAN detected whose IP address is not the reserved private subnet 10.x.x.x. Thus, if neither IP address is 10.x.x.x, the first LAN detected by HAFM is designated as the public LAN. This order of detection is influenced by Microsoft Windows and is not guaranteed. For a dual LAN configuration, both LANs must be connected when the HAFM appliance is booted up. If only one is connected, HAFM interprets this as a single LAN configuration, and the connected LAN is designated as the LAN for remote client sessions. Workaround There are a two ways to ensure the pubic and private designations of the LANs. • If you use a private LAN IP address, this causes this LAN to be designated as the private LAN. You must also have the public LAN connection active when the HAFM appliance is booting up, or else HAFM interprets this as a single LAN connection configuration, and the 10.x.x.x LAN is designated as the LAN for remote client sessions. • You can configure a specified Ethernet interface on the HAFM appliance to be the public LAN (to listen for remote client connections). To configure this feature, you must manually edit a file on the HAFM appliance to explicitly specify which IP address HAFM should use as the public LAN. For detailed instructions, see HP StorageWorks HA-Fabric Manager User Guide. If the public LAN IP address of the HAFM appliance is ever changed, this file must be edited again to reflect the new IP address. Known issues This section describes the known issues related to the 1U HAFM appliance and the HAFM software. Setting date/time of HAFM appliance to earlier time may cause loss of management to switches When changing the HAFM appliance time to an earlier time, the Ethernet link to directors and edge switches may be lost, or an open element manager may close. When attempting to reopen the element manager, the error message "The link to the product is not available: Connection lost" may be displayed. 22

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The issue arises because either LAN connection on the HAFM appliance can be
the public LAN or the private LAN. Though the directors and edge switches can be
managed via either LAN, the public LAN is the only one that can support remote client
access. Thus, if one attempts to access the HAFM appliance via a remote client session
and is unknowingly using what has been designated as the private LAN, the remote
session is not allowed. The IP address that the HAFM appliance has determined to be
the public LAN which supports remote client access, displays HAFM which displays
after selecting
SAN > Server Properties.
HAFM designates the public LAN as the
fi
rst LAN detected whose IP address is not the
reserved private subnet
10.x.x.x
. Thus, if neither IP address is
10.x.x.x
, the
fi
rst
LAN detected by HAFM is designated as the public LAN. This order of detection is
in
fl
uenced by Microsoft Windows and is not guaranteed.
For a dual LAN con
fi
guration, both LANs must be connected when the HAFM
appliance is booted up. If only one is connected, HAFM interprets this as a single
LAN con
fi
guration, and the connected LAN is designated as the LAN for remote client
sessions.
Workaround
There are a two ways to ensure the pubic and private designations of the LANs.
•
If you use a private LAN IP address, this causes this LAN to be designated as
the private LAN. You must also have the public LAN connection active when the
HAFM appliance is booting up, or else HAFM interprets this as a single LAN
connection con
fi
guration, and the
10.x.x.x LAN
is designated as the LAN for
remote client sessions.
•
You can con
fi
gure a speci
fi
ed Ethernet interface on the HAFM appliance to be
the public LAN (to listen for remote client connections). To con
fi
gure this feature,
you must manually edit a
fi
le on the HAFM appliance to explicitly specify which
IP address HAFM should use as the public LAN.
For detailed instructions, see
HP StorageWorks HA-Fabric Manager User Guide.
If the public LAN IP address of the HAFM appliance is ever changed, this
fi
le
must be edited again to re
fl
ect the new IP address.
Known issues
This section describes the known issues related to the 1U HAFM appliance and the
HAFM software.
Setting date/time of HAFM appliance to earlier time may cause loss of
management to switches
When changing the HAFM appliance time to an earlier time, the Ethernet link to
directors and edge switches may be lost, or an open element manager may close.
When attempting to reopen the element manager, the error message “The link to the
product is not available: Connection lost“ may be displayed.
22