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![[NOTE: ]](images/note.gif) |
NOTE: This operation applies to the HP Series 5400zl switches, the Series 3500yl switches, the switch 6200yl, the switch 8212zl, the Series 5300xl switches, as well as the 1600M, 2400M, 2424M, 4000M, and 8000M, but not to the Series 2500, 2650, Series 4100gl, Series 4200vl, or 6108 switches (which do not have static traffic/security filters.) |
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IP multicast addresses occur in the range from 224.0.0.0 through 239.255.255.255 (which corresponds to the ethernet multicast address range of 01005e-000000 through 01005e-7fffff.) Where a switch has a static traffic/security filter configured with a "multicast" filter type and a "multicast address" in this range, the switch will use the static filter unless IGMP learns of a multicast group destination in this range. In this case, IGMP dynamically takes over the filtering function for the multicast destination addresses for as long as the IGMP group is active. If the IGMP group subsequently deactivates, the switch returns filtering control to the static filter.
Traffic to IP multicast groups in the IP address range of 224.0.0.0 to 224.0.0.255 will always be flooded because addresses in this range are "well known" or "reserved" addresses. Thus, if IP multicast is enabled, and there is an IP multicast group within the reserved address range, traffic to that group will be flooded instead of filtered by the switch.
To support IP multicasting, the multicast range of 01-00-5E-00-00-00 to 01-00-5E-7F-FF-FF is reserved for Ethernet MAC addresses. The command ip arp-mcast-replies enables acceptance of the MAC addresses in the IP multicast range.
Syntax:
Enables or disables accepting multicast MAC addresses in the IP multicast address range in ARP requests and replies.