[ewg] Which IPv6 multicast group to be used for "mckey" ?

[Vivek Satpute]

Hi,

Please someone help me on this issue..

Thanks in advance,
Vivek

On Sat, Mar 6, 2010 at 10:30 PM, Vivek Satpute <vivekonline86 at gmail.com>wrote:

> Hi,
>
> I did google on this and found the following link:
> http://www.mail-archive.com/linux-rdma@vger.kernel.org/msg00953.html
>
> As per above link:
>
> RDMA CM treats AF_INET6 addresses that are either 0 or prefixed with
> FF1x:A01B::/32 as MGIDs
>
> 1) So, does it mean that mckey works with multicast addresses starting with
> FF1x:A01B only ?
>
> 2) Again, I did some testing and found that if I use multicast address *
> FF12:A01B:0:0:0:0:0:A*
> with mckey, then multicast join fails with following error:
>
> #mckey -M FF12:A01B:0:0:0:0:0:A -b fe80::202:c903:0:d1e1
> mckey: starting server
> mckey: joining
> mckey: event: RDMA_CM_EVENT_MULTICAST_ERROR, error: -22
> test complete
> return status 0
>
> mckey fails if  "X" bit in "FF1X:A01B: .... ", is 2. For any value of X
> other than 2, mckey works fine. Can anyone please tell me the reason of this
> ?
>
> Thanks in advance,
> Vivek
>
> On Sat, Mar 6, 2010 at 9:34 PM, Vivek Satpute <vivekonline86 at gmail.com>wrote:
>
>> Hi,
>>
>> I am new to infiniband technology, so do not have much more exposure of
>> it.
>>
>> I have installed OFED-1.5 on my machine. I was trying to run mckey
>> application
>> with following *two different multicast groups*.
>>
>> mckey -M *FF10:0:0:0:0:0:0:B* -b 10.10.10.1 (receiver)
>> mckey -M *FF10:0:0:0:0:0:0:C* -b 10.10.10.2 -s (sender)
>>
>> Above both multicast groups are different, still data sent by sender is
>> received
>>
>> by receiver on another machine. Why it happens ?
>>
>> Is there any special format of IPv6 multicast groups for Infiniband ?
>>
>>
>> Thanks in advance,
>> Vivek.
>>
>
>
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