> Something like that. I need to run routing protocols on the switch I/Fs and > egress > pkgs on selected switch I/Fs bypassing ARP, just like DSA does with its vendor > tags.
Does the switch have an equivalent tagging protocol? If you are building a tree of switches you need something like this for frames going from the host via intermediate switches and out a specific port on a remote switch. > We might have a tree as well so now I really wonder: Given we write a > proper switchdev driver, can it support switchtrees without touching > switchdev infra structure? Jiri Pirko <j...@resnulli.us> is probably the best person to ask about this. DSA hides the knowledge that there is multiple switches. To switchdev, a tree of switches looks like one switch. This is not because of switchdev, it is just the existing DSA code worked when switchdev came along. If not I guess we will attach a physical > eth I/F to the switch and use both DSA and switchdev to support both trees > and HW offload. This only works if the switch has the necessary tagging protocol to pass through multiple switches. > We have on an existing board with a BCM ROBO switch with lots of ports(>24), > managed over SPI. Looking at BCM DSA tag code it looks like it only supports > some 8 ports or so. I still have to find out if this is a limitation in BCM > tagging > protocol or if just not impl. in DSA yet. Hi Florian, care to comment? As far as i understand, the tag used for SF2 and B53 does not support a tree of switches. But the big ROBO switches might have a different tagging protocol. Andrew
