> -----Original Message----- > From: Mike Christie [mailto:[email protected]] > Sent: Monday, January 03, 2011 3:39 PM > To: [email protected] > Cc: Iyer, Shyam; [email protected] > Subject: Re: DCB support for iSCSI > > On 12/22/2010 11:22 PM, [email protected] wrote: > >> VLAN creation. > >> From what I've seen iSCSI support in DCB would work similar > >> to FCoE, ie the iSCSI traffic will be sent via a separate > >> VLAN. Which we would need to create, eventually. > >> So basically we would need something similar to 'fipvlan' > >> or integrate this functionality into open-iscsi. > > > > Well there are more methods actually. Separating them into separate > VLAN's would tag them to the priority of the VLAN(8 in all) however > sometimes the tag is based on the application type port number. > > > > So, in the iSCSI case the well known port number 3260 becomes the > priority decider. > > > > I actually broke the code to support ports other than 3260 in a rhel > test release, and so I know people use other ports in real life setups > :) I would bet the vast majority of times it is 3260, but it is not > always so I do not think you can count on it if that is what you are > saying. > The spec tries to make it easy by assigning a priority tag based on the application's well known port number. As long as the lldp peers know what port number to use for priority tagging it should be fine.
> > > Usecase - Tag all iSCSI traffic to a specific port type in a > virtualized environment. Its very cumbersome to manage vlans in the > virtualized environments. > > > > Also ETS determines that within the same priority group the bandwidth > could be split further. Now, this could be per connection. My hunch is > that we need more flexible ways of splitting the bandwidth within a > priority group per connection via the lldpad. > > > > What is ETS? Sorry for the acronym.. It means enhanced transmission selection. This link is pretty good.. http://www.ieee802.org/1/files/public/docs2008/az-wadekar-ets-proposal-0608-v1.01.pdf -- You received this message because you are subscribed to the Google Groups "open-iscsi" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/open-iscsi?hl=en.
