Hi Murali, On Tue, 26 May 2020 at 17:12, Murali Karicheri <m-karicheri2@xxxxxx> wrote: > > Hi Vladimir, > > I haven't looked the spec for 802.1CB. If they re-use HSR/PRP Tag in the > L2 protocol it make sense to enhance the driver. Else I don't see any > re-use possibility. Do you know the above? > > Thanks > > Murali IEEE 802.1CB redundancy tag sits between Source MAC address and Ethertype or any VLAN tag, is 6 bytes in length, of which: - first 2 bytes are the 0xf1c1 EtherType - next 2 bytes are reserved - last 2 bytes are the sequence number There is also a pre-standard version of the IEEE 802.1CB redundancy tag, which is only 4 bytes in length. I assume vendors of pre-standard equipment will want to have support for this 4-byte tag as well, as well as a mechanism of converting between HSR/PRP/pre-standard 802.1CB tag on one set of ports, and 802.1CB on another set of ports. > > -- > Murali Karicheri > Texas Instruments Thanks, -Vladimir
