HP Virtual Connect 1.10Gb-F Ethernet Module for c-Class BladeSystem - Manual (Page 120)

Network management 120
IGMP Snooping
The IGMP Snooping feature allows 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. 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 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.
Stacking Links screen
To access this screen, click the Stacking Links link under Fibre Channel Settings in the left VC Manager
navigation window
This screen shows the current status of Virtual Connect Ethernet module stacking links. This screen is the
same as the stacking links screen (" Stacking Links " on page 78 ) used in the Network Setup Wizard.
Shared uplink sets and VLAN tagging
A shared uplink set is a way of identifying Virtual Connect Ethernet module uplinks that will carry multiple
networks over the same cable. In this case, each Ethernet packet carries a VLAN tag (IEEE 802.1Q) to
identify the specific network to which it belongs. On shared uplinks, the VLAN tags are added when
packets leave the VC-enabled enclosure and are removed when packets enter the enclosure. The external