BFD neighbor can't be established between CISCO 9300 and Juniper device

[rock.zhang@fil.com]

Hi,

we got an issue tha BFD neighbor can't be established between CISCO 9300 and Juniper device, please help to check the following configuration. thanks a ton if you can share any idea.

C9300

interface GigabitEthernet1/0/3
no switchport
ip address 198.19.127.18 255.255.255.252
no ip redirects
bfd interval 500 min_rx 500 multiplier 3
end

When

ip route static bfd GigabitEthernet1/0/3 198.19.127.17

nothing display under"show bfd nei"

When

ip route static bfd GigabitEthernet1/0/3 198.19.127.17 unassociate

show bfd nei

NeighAddr LD/RD RH/RS State Int
198.19.127.17 1/0 Down Down Gi1/0/3
ip route 172.31.0.0 255.255.0.0 198.19.127.17

Juniper configruation

Set routing-options static route 172.6.80.0/29 next-hop 198.19.127.18

Set routing-options static route 172.6.80.0/29 bfd-liveness-detection minimum-interval 500

Set routing-options static route 172.6.80.0/29 bfd-liveness-detection minimum-receive-interval 500

Set routing-options static route 172.6.80.0/29 bfd-liveness-detection multiplier 3

Set interfaces ge-0/0/3 unit 0 family inet address 198.19.127.17/30

Ping has no problem from 198.19.127.18 to 17

#ping 198.19.127.17
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 198.19.127.17, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 5/9/11 ms

[marce1000]

 - Check the logs on both platforms after the intended setup has been done , look for errors or info's

 M.

[balaji.bandi]

I am also keen to see  Juniper what device model of Juniper and version of code running that device.

post juniper config and below out form both the devices :

Cisco

#sh bfd neighbors details

Juniper

> show bfd session detail

also worth looking at Juniper community :

https://kb.juniper.net/InfoCenter/index?page=content&id=KB33891&cat=JUNOS_PLATFORM&actp=LIST

[Georg Pauwen]

Hello,

as far as I recall, on Juniper devices, by default, BFD is supported on single-hop static routes. Depending on your model, you need to configure extra options in order to support multiple hops. The link below shows how to do that on the EX72/73/74:

https://kb.juniper.net/InfoCenter/index?page=content&id=KB22071

And on MX devices, it is not supported at all:

'On MX Series devices, multihop BFD is not supported on a static route if the static route is configured with more than one next hop. It is recommended that you avoid using multiple next hops when a multihop BFD is required for a static route.'