HP Virtual Connect 4Gb Fibre Channel Module for c-Class BladeSystem - Manual (Page 122)

Configuring the Virtual Connect domain using the CLI 122
Assigning a server profile to device bay 1
To assign a server profile to a specific device bay, use the assign profile command:
>assign profile MyProfile enc0:1
When a profile is created and assigned to a multi-blade server, the profile is applied to all of the blades in
the multi-blade server. Therefore, the profile should contain enough Ethernet and Fibre Channel connection
entries for all of the ports on all of the blades in the multi-server.
Configuring IGMP settings
To set Ethernet IGMP snooping properties, use the set igmp command:
> set igmp enabled=true timeout=30
IGMP allows VC-Enet modules to monitor (snoop) the IP multicast membership activities and to configure
hardware Layer 2 switching behavior of multicast traffic to optimize network resource usage. Currently only
IGMP v1 and v2 (RFC2236) are supported.
The IGMP Snooping idle timeout interval is set to 260 seconds by default. This value is basically the "Group
Membership Interval" value as specified by IGMP v2 specification (RFC2236). For optimum network
resource usage, set the interval to match the configuration on the customer network's multicast router settings.
Configuring MAC cache failover settings
• To configure MAC Cache Failover Settings, use the set mac-cache command:
>set mac-cache enabled=true refresh=10
• To display MAC Cache Failover Settings, use the show mac-cache command:
>show mac-cache
When a VC-Enet uplink that was previously in standby mode becomes active, it can take several minutes for
external Ethernet switches to recognize that the c-Class server blades can now be reached on this
newly-active connection. Enabling Fast MAC Cache Failover causes Virtual Connect to transmit Ethernet
packets on newly-active links, which enables the external Ethernet switches to identify the new connection
(and update their MAC caches appropriately.) This transmission sequence repeats a few times at the MAC
refresh interval (5 seconds recommended) and completes in about 1 minute.
IMPORTANT: Be sure to set switches to allow MAC addresses to move from one port to another
without waiting for an expiration period or causing a lock out.
Server blade power on and power off guidelines
Certain server profile changes require the server blade in the device bay to be powered off before the
change can be made. HP recommends that administrators power off servers with the server console before
attempting such operations within the Virtual Connect Manager. The Virtual Connect Manager also provides
an opportunity to power off the server blade before such operations.
If any changes are made that require modifications to the server, the server blade must be powered off.
Network or Fabric changes do not require the server blade to be powered off. Server side settings include the
following:
• Assigning a VC- or user-defined MAC address
• Changing the PXE setting