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Diffstat (limited to 'doc/developer')
| -rw-r--r-- | doc/developer/fpm.rst | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/doc/developer/fpm.rst b/doc/developer/fpm.rst index 9849869133..56d33671d2 100644 --- a/doc/developer/fpm.rst +++ b/doc/developer/fpm.rst @@ -101,3 +101,19 @@ Data ^^^^ The netlink or protobuf message payload. + + +Route Status Notification from ASIC +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +The dplane_fpm_nl has the ability to read route netlink messages +from the underlying fpm implementation that can tell zebra +whether or not the route has been Offloaded/Failed or Trapped. +The end developer must send the data up the same socket that has +been created to listen for FPM messages from Zebra. The data sent +must have a Frame Header with Version set to 1, Message Type set to 1 +and an appropriate message Length. The message data must contain +a RTM_NEWROUTE netlink message that sends the prefix and nexthops +associated with the route. Finally rtm_flags must contain +RTM_F_OFFLOAD, RTM_F_TRAP and or RTM_F_OFFLOAD_FAILED to signify +what has happened to the route in the ASIC. |