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[mc36 <>]

hi,

On 5/2/22 19:58, Fr  d  ric LOUI wrote:
>      Run SONIC and RARE/freeRtr AT_THE_SAME_TIME

i have concerns on this particular topic:
we already had a small chat with alex (the author of an other p4 program 
packaged into the rare builds called packet-broker)
and finally we found out that, that regardless freerouter already have the 
(test covered) capability to multiplex up/downstream
some front-panel ports, it most probably will interwork only with other rare 
profiles of ours, because this capability depends
both in the control plane and in the dataplane code on that the cpu-port 
format is common between the pipes, so a single
freerouter can understand (and multiplex up and downstream) the packets from 
both the tofino pipes.

moreover, some features like the hairpin interfaces or the tunnel 
decapsulation depends on recirculation, which also uses a
rare specific header to pass all the extra information between the packet 
processing rounds, and, recirculation happens
between the pipes, that is, this particular case will most probably simply 
won't work at all because the pipes will diverge
in the forwarding info, and in case of different p4 programs, even the extra 
header will not match.

br,
cs