HP Virtual Connect for c-Class BladeSystem Version 4.01 User Guide

Virtual Connect networks 111
4.
(Optional). Select a color to assign the multicast filter.
5. Create one or more multicast filter rules to specify an IGMP multicast group IP address for which access
is permitted (maximum 32 rules per filter):
a. Enter a Multicast IP Address in the form of IP Address/Netmask Bits. For example, 224.10.0.0/16.
The IP Address must be unique and should be the starting address of an IP subnet.
b. Click Add.
6. Add one or more multicast filter sets to allow server ports to have multiple multicast filters assigned to
them:
a. Enter the name of a multicast filter set.
b. Click Add.
7. Click OK to save your changes.
To edit a multicast filter:
1. Highlight the filter to edit.
2. Right-click the filter and select Edit from the pull-down menu, or select Edit in the action column.
To delete a multicast filter:
1. Highlight the filter to delete.
2. Right-click the filter and select Delete from the pull-down menu, select Delete in the action column, or
select the filter checkbox, and then click Delete.
Assigning a filter or filter set to a profile connection
A Multicast Filter or a Multicast Filter Set can be associated with one or more server profile Ethernet
connections.
• If IGMP snooping is enabled, the defined filters are active after they are associated with a profile
connection.
• When IGMP snooping is disabled, you can still configure filters and assign them to profiles; however,
IGMP filtering will not be in effect.
When an IGMP report on a VC port is received, all of the filters configured for the port are searched for a
match to the multicast group IP address. When a match is found, the report is processed and the group
membership is updated. If no match is found, IGMP v1 and v2 reports and Leave messages are
dropped. IGMPv3 reports are dropped if no record in the report matches any of the configured filter rules.
The report is relayed if there is at least one record matching any of the filter rules configured for the profile
Enet connection. The default action is ‘deny’.
If no filters are configured for a given profile connection, VC snoops all IGMP reports received on that port.
Multicast filters can be associated with profile connections (server downlink ports) and apply to the Ethernet
network associated with the connection. Filters cannot be associated with uplink or stacking link ports.
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.