[f-nsp] BGP-BFD on CER2024 / Netiron

[Bas van Elburg]

Hi Cenk,

Could this be what you are looking for:

neighbor 1.1.1.2 fail-over bfd-enable
neighbor 2.2.2.2 fail-over bfd-enable


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Bas van Elburg
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From: foundry-nsp <foundry-nsp-bounces at puck.nether.net> on behalf of Cenk Kücük <kuecuek at sipgate.de>
Sent: Wednesday, 3 February 2021 11:12
To: foundry-nsp at puck.nether.net <foundry-nsp at puck.nether.net>
Subject: [f-nsp] BGP-BFD on CER2024 / Netiron

Hi!
We are trying to set up BGP-BFD on a CER2024 running version 6.2.0aT183.
Our configuration looks like this:


bfd sh-session-setup-delay 5

interface ethernet 1/6
enable
no fdp enable
no cdp enable
no spanning-tree
sflow forwarding

vlan 3000 name "Vlan 3000"
tagged ethe 1/6
router-interface ve 3000

vlan 3001 name "Vlan 3001"
tagged ethe 1/6
router-interface ve 3001

interface ve 3000
bfd interval 2000 min-rx 2000 multiplier 4
ip address 1.1.1.1/31<http://1.1.1.1/31>
!

SSH at c13-1#show run int ve 3001
interface ve 3001
bfd interval 2000 min-rx 2000 multiplier 4
ip address 2.2.2.1/31<http://2.2.2.1/31>

router bgp
local-as 15594
bfd-enable
auto-shutdown-new-neighbors
default-local-preference 110
fast-external-fallover

neighbor 1.1.1.2 remote-as 12345
neighbor 1.1.1.2 password 2 SECRET
neighbor 1.1.1.2 bfd min-tx 200 min-rx 200 multiplier 4
neighbor 1.1.1.2 bfd holdover-interval 5

neighbor 2.2.2.2 remote-as 12345
neighbor 2.2.2.2 password 2 SECRET
neighbor 2.2.2.2 bfd min-tx 200 min-rx 200 multiplier 4
neighbor 2.2.2.2 bfd holdover-interval 5

address-family ipv4 unicast
neighbor 1.1.1.2 prefix-list BGP-3000-IN in
neighbor 1.1.1.2 prefix-list BGP-3000-OUT out
neighbor 2.2.2.2 prefix-list BGP-3001-IN in
neighbor 2.2.2.2 prefix-list BGP-3001-OUT out



According to our peer (Juniper MX system) they are only running BGP-BFD, not BFD on the interface. We tried our configuration with or without BFD on the interfaces ve3000/ve3001. In any case, "show ip bgp neighbors $IP" always says "BFD: Disabled". "show bfd" says:

BFD State: ENABLED Version: 1 Use PBIF Assist: Y SH setup delay 5 MH setup delay 0
Current Registered Protocols: bgp/0 static/0
All Sessions: Current: 0 Maximum Allowed: 40 Maximum Exceeded Count: 0
Maximum TX/RX Sessions Allowed on LP: 40 Maximum Session Exceeded Count for LPs: 0
LP Tx/Rx Sessions LP Tx/Rx Sessions
1 0/0 2 0/0
BFD Enabled ports count: 2
Port MinTx MinRx Mult Sessions
ve 3000 2000 2000 4 0
ve 3001 2000 2000 4 0


show bfd neighbors
No BFD Neighbor found.


show bfd applications
Registered Protocols Count: 2
Protocol VRFID Parameter HoldoverInterval
bgp 0 0 0
static 0 1 0


We are not sure how to configure and/or debug BFD. Various "debug bfd *" settings did not show any output.
Does anybody have any ideas about this?

Regards
Cenk
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