HP Virtual Connect 4Gb Fibre Channel Module for c-Class BladeSystem - Manual (Page 111)

Virtual Connect networks 111
Task Action
Filter the entries in the
table Click Filter, use the pull-down menus to select the filter you want to view, and then click
Go.
Edit a filter Click the Edit link in the Action column, or left-click on the filter row, right-click to display
a menu, and then select Edit.
Define a new filter Click +, or right-click in the table to display a menu, and then click Add. For more
information, see "Add, edit, or delete a multicast filter (on page 113 )."
Delete a filter Click the Delete link in the Action column, left-click on the filter row, right-click to display
a menu, and then select Delete. You can also select the checkboxes for the filters you
want to delete, and then click Delete. Type in 'delete,' and then click OK.
Display a summary of a
specified filter Select a filter in the table to display all the rules and labels associated with the filter.
For more information, see "Assigning a filter or filter set to a profile connection (on page 114 )."
IGMP Snooping
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, select the Prevent flooding of unregistered multicast traffic option.
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.
Multicast Filtering
A multicast filter is a set of rules for filtering the IGMP Reports. The server administrator defines the rules that
filter the IGMP report by specifying the multicast group IP address and the multicast group IP prefix length.
This defined filter can then be associated with a profile Ethernet connection. A multicast filter can contain up
to a maximum of 32 filter rules. A multicast filter without any rules is defined as an empty filter. One or more
multicast filters can be grouped into a multicast filter set. The multicast dataflow through the VC domain is
determined by the IGMP settings. Users can create a maximum of 512 filters in a domain.
A multicast filter or multicast filter set can be assigned to one or more profile Enet connections. A filter
configuration associated with a profile Enet connection applies to all vNets the server port is part of. Multicast
filters and filter sets can be defined and assigned to profile connections at any time after the VC domain is
configured. However, IGMP snooping MUST be enabled for filtering to be in effect. HP recommends
enabling the option to prevent flooding of unregistered multicast traffic when using filtering.
The following behavior can be expected when filters are configured in a VC domain:
• If one or more non-empty filters or filter sets are assigned to a profile Enet connection, an IGMP Report
or Leave message received from the server port is matched with the set of configured filter rules. Reports
matching the rules are allowed to join the group. Any non-matching Report is ignored.
• If no filters or filter sets are assigned to a profile Enet connection, all IGMP Reports received from the
respective server port are snooped by VC.