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HP Networking K-platform Switches - Message in the Event Log: wellknown DA packet received with address well known mcast address
After updating to a recent K.15 software, the switch has started logging the following event log messages in the event log and to configured trap receivers:
I 09/26/11 08:20:20 02422 igmp: AM2: wellknown DA packet received with address well known mcast address
The address ranges considered wellknown are the following:
184.108.40.206/24 220.127.116.11/24 18.104.22.168/24 22.214.171.124/24
Refer to the web link given below for details:
This event message was not available on previous versions of K-software. The event is triggered by receiving an IGMP JOIN message for a well-known (reserved) multicast group address.
Layer 3 multicast addresses are mapped onto a layer 2 multicast address in the 01:00:5E:xx:xx:xx range, where xx:xx:xx is replaced by the lower 23 bits of the layer 3 address, thus all the listed layer 3 addresses map to the same layer 2 address range of 01:00:5E:00:00:xx. Since the matching of the non-routed multicast address range (126.96.36.199/24) is actually done on the MAC address directly in hardware, all the listed layer 3 addresses will trigger the error message.
The user will remove this event message completely in software version K.15.07. In the meantime the above workaround can be used to suppress the message.
NOTE: One or more of the links above will take you outside the Hewlett-Packard Web site, HP does not control and is not responsible for information outside of the HP Web site.