HP Virtual Connect 4Gb Fibre Channel Module for c-Class BladeSystem - Manual (Page 151)

Configuring the Virtual Connect domain using the CLI 151
Adding a network access group to a profile
To create a new profile and assign an existing network access group, use the add profile command:
>add profile MyNewProfile2 Nag=DatabaseNetGroup
To modify the network access group of an existing server profile, use the set profile command:
>set profile Profile1 Nag=NetGroup1
Assigning a server profile to a device bay
To assign a server profile to a specific device bay, use the assign profile command:
>assign profile MyProfile enc0:1
When defining server profiles in a multi-enclosure configuration, profiles can be assigned to server bays in
any of the enclosures that have been added and imported into the domain.
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. Be sure that the profile contains enough Ethernet and Fibre Channel connection entries
for all of the ports on all of the blades in the multi-blade server.
Configuring IGMP settings
To configure Ethernet IGMP snooping settings, use the set igmp command:
>set igmp Enabled=true Timeout=30
The IGMP Snooping feature enables VC-Enet modules to monitor (snoop) the IGMP IP multicast membership
activities and configure hardware Layer 2 switching behavior of multicast traffic to optimize network
resource usage. IGMP v1, v2, and v3 snooping are supported.
The IGMP Snooping idle timeout interval is set to 260 seconds by default. This value is 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.
By default, unregistered IGMP multicast traffic traversing VC–Enet modules is flooded on the configured
Ethernet network. To prevent flooding, set the NoFlood property to true.
>set igmp Enabled=true NoFlood=true
Unregistered multicast traffic from uplinks is dropped and traffic from the server ports is redirected to the
active uplink port. IGMP Snooping must be enabled to modify this setting.
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, external Ethernet switches can
take several minutes 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 (HP
recommends 5 seconds) and completes in about 1 minute.