Specifications

HP Virtual Connect for Cisco Network Administrators (version 1.2x) page 43
Figure 18. Using multiple vNets to extend PVLAN configuration from external Cisco switch
(Please refer to Cisco documentation for a discussion of isolated, promiscuous, and community VLANs)
Multicast & IGMP Snooping
The IGMP Snooping feature allows VC-Enet modules to monitor (snoop) the IGMP membership
activities of the blade servers and optimize a vNet’s handling of multicast traffic to maximize
network resource utilization. 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 utilization, set the interval to match the configuration on the network's multicast
router.
By default, VC will flood, not prune, for all multicast groups. If a particular multicast group receives
an explicit join from a server NIC port, then that multicast group (and that group only) will be pruned
for any server NIC port that doesn’t transmit a join message. All other multicast groups will continue
to flood.
See the Virtual Connect User Guide for instructions on configuring IGMP Snooping.
SPAN (Port Monitoring)
Virtual Connect supports port monitoring functionality to assist in troubleshooting networking issues
for servers connected to the external network through Virtual Connect. VC allows an Administrator
to define a single, active port monitoring session per VC domain.