AMT/vPro MLD storms?

Sam Wilson Sam.Wilson at
Thu Feb 6 13:42:33 CET 2014

On 6 Feb 2014, at 12:21, Phil Mayers <p.mayers at> wrote:

> [snip]
> The MLD packets are of the form:
> 2c:44:fd:xx:xx:xx > 33:33:00:01:00:03, ethertype IPv6 (0x86dd), length 86: fe80::2e44:fdff:fexx:xxxx > ff02::1:3: HBH ICMP6, multicast listener reportmax resp delay: 0 addr: ff02::1:3, length 24
> ...and alternate from each machine; as above, as if each machine is induced to emit an MLD packet by seeing the other do it.
> Note the v6 LL IP is a mutated form of EUI-64 (locally-assigned bit toggled?)

Are you sure about that last?  Surely the U/L bit should be flipped in LL addresses using the EUI-64 format and that would correspond to an OUI of 2c-44-fd - Hewlett-Packard.

Sam Wilson
Communications Infrastructure Section, IT Infrastructure
Information Services, The University of Edinburgh
Edinburgh, Scotland, UK

The University of Edinburgh is a charitable body, registered in
Scotland, with registration number SC005336.

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