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Posts: 90
Registered: ‎10-19-2013
0 Kudos
Accepted Solution

BFD mode supported on MX5

[ Edited ]

Hi everybody,


I am trying to find BFD supported modes on JUNOS.  In Cisco, we have two modes : Control mode, echo mode.

Does JUNOS only support Control mode  control messages are exchanges as keep alive mehanism which is proessed by CPU?


Echo mode:  echo messages are exchanged at data plane so it is added as an opton in BFD standard later .


Thanks and have a nice weekend!!


It appears JUNOS only support Control mode :



Juniper Employee
Posts: 8
Registered: ‎02-04-2016

Re: BFD mode supported on MX5

Hi Sarah,



Juniper donesnot support echo mode. please find the below link for supported and non supported RFC for BFD




Hope this helps

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Super Contributor
Posts: 68
Registered: ‎06-21-2017

Re: BFD mode supported on MX5



Juniper supports Centralized and Distributed BFD where centralized BFD refer to BFD that runs on the Routing Engine and  Distributed is PFE based.


Below command tells if BFD is centralized or Distributed:


lab@mx240-3-re0> show ppm adjacencies detail
Protocol: OSPF2, Hold time: 40000, IFL-index: 359
Distributed: FALSE
OSPF source key:, OSPF area ID:
In the example above, the “Distributed” flag is false. Hence, OSPF is running on RE PPMD

lab@mx240-3-re0# run show ppm adjacencies detail
Protocol: BFD, Hold time: 900, IFL-index: 359
Distributed: TRUE
BFD discriminator: 16, BFD routing table index: 0
Here, the “Distributed” flag is TRUE. Hence BFD is distributed to PFE




Please refer the below documents for more details:











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