HP Virtual Connect Enterprise Manager 7.2 Release Notes

3. You can resolve this by either modifying the configuration and disabling IGMP No Flood on
the VC Domain that is being added into the VC Domain Group or by modifying the
configuration and enabling IGMP Snooping on the VC Domain Group using VC Domain
Maintenance.
a. Use one of the following options to disable IGMP No Flood on the VC Domain that is
being added to the VC Domain Group:
• From the VCM command line—Telnet into the VCM using an SSH connection such
as SSH [e-mail], where xxx is the VC Domain IP address.
Enter set igmp NoFlood=false .
• From the VCM GUI—Clear the Prevent flooding of unregistered multicast traffic check
box.
b. Use one of the following options to enable IGMP Snooping on the VC Domain Group to
which the VC Domain will be added:
• From the VCEM GUI:
a. Start a VC Domain Maintenance operation on any VC Domain in the VC Domain
Group
b. Enable IGMP Snooping from the VCM CLI by telneting into VCM using an SSH
connection such as SSH [e-mail], where xxx is the VC
Domain IP address of the VC Domain under maintenance
c. Enter set igmp Enabled=true.
• From the VCM GUI:
a. Enable IGMP Snooping by clicking the Enable IGMP Snooping check box
b. Browse to the VCEM GUI and complete VC Domain Maintenance.
4. Add the VC Domain to the VC Domain Group again.
Canceling Domain Maintenance
If the VC Domain Group currently has IGMP Snooping disabled and the administrator changes
the VC Domain 3.70 running in compatibility mode to enable both IGMP Snooping and IGMP
NoFlood, and then cancels the maintenance operation use the following workaround:
1. Wait until VCM restores communication with VCEM. The communication is restored when you
are able to log into the VCM web interface.
2. Access the VCM GUI or CLI for the VC Domain that failed to cancel maintenance.
3. Select one of the following options to disable IGMP No Flood
• From the VCM command line, telnet into VCM using an SSH connection such as SSH
[e-mail], where xxx is the VC Domain IP address and enter set
igmp NoFlood=false.
• From VCM GUI, clear the Prevent flooding of unregistered multicast traffic check box.
4. Browse to the VCEM GUI and cancel the VC Domain Maintenance again.
Completing Domain Maintenance
If the VC Domain Group currently has IGMP Snooping enabled and the VC Domain 3.70 running
in compatibility mode has both IGMP Snooping and IGMP No Flood enabled and the administrator
disables IGMP Snooping in another VC Domain in the VC Domain Group and tries to complete
maintenance the 3.70 VC Domain is marked as a “configuration mismatch”. If the administrator
proceeds with the resynchronization process when prompted by VCEM, the failure will occur. Use
the following workaround if this situation occurs:
1. Wait until VCM restores communication with VCEM. The communication is restored when you
are able to log into the VCM web interface.
2. Access the VCM GUI or CLI for the VC Domain that failed to complete maintenance.
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