Robert Love wrote:
> On Fri, 2010-05-07 at 16:26 -0700, Joe Eykholt wrote:
>> The following series implements the proposed-to-become-standard
>> FIP point-to-multipoint support.
>>
>> The T11 FC-BB-6 committee is proposing a new FIP usage model called
>> VN_port to VN_port mode. It allows VN_ports to discover each other
>> over a loss-free L2 Ethernet without any FCF or Fibre-channel fabric
>> services. This is point-to-multipoint. There is also a mode
>> of this called point-to-point (not implemented here) which provides
>> for making sure there is just one pair of ports operating over
>> the Ethernet fabric.
>>
>> The point-to-multipoint mode will work over direct links and
>> eventually, DCB switches. Cisco switches require turning off
>> the FCoE feature to allow this, however. One shouldn't take
>> this as an indication that switches will or will not more fully
>> support VN2VN mode.
>>
>> See the spec at http://www.t11.org/ftp/t11/pub/fc/bb-6/10-019v2.pdf
>> for more details. That's close, but I know there are updates coming.
>>
>> This part of the BB-6 proposals may become more solid after the
>> next T11 meeting in June or the one after that. The BB-6 standards
>> as a whole may not be ratified until April 2011 or so.
>>
>> I'd be interested to hear about whether these are useful enough
>> to integrate before the standard is completely done.
>>
>> Some of these patches are obviously applicable without the VN2VN
>> changes.
>>
>
> Hey Joe,
>
> Can you help me understand where the fip->ctlr_src_addr gets updated
> after we have claimed a FCID? As far as I can tell we're setting it in
> fcoe_interface_setup and fcoe_interface_setup, but not anywhere around
> the time we call update_mac in the fcoe_ctlr_vn_timeout work thread.
ctl_src_addr never gets updated, it's always the native MAC address of the
interface. When we get an FC_ID in VN2VN mode, we use update_mac to give
the address to fcoe, which it calls data_src_addr.
> We're using the fip->ctlr_src_addr to send the CLAIM after update_mac,
> but I'm not sure it's being updated.
That's correct. The Claim comes from ctl_src_addr. The contents show the
FC_ID and the MAC we're claiming, not the Ethernet header.
Regards,
Joe
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