BDF: warnings on OSPF BFD over IPIP tunnel

[EasyNetDev]

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Describe the bug

When I'm activating "ip ospf bfd" on IPIP tunnel I'm getting a repeating message in the logs:

Aug  3 15:11:03 R01 bfdd[100847]: [VJ3VQ-JZYHV] BFD: getting peer's mac failed error No such device or address
Aug  3 15:11:03 R01 bfdd[100847]: [VJ3VQ-JZYHV] BFD: getting peer's mac failed error No such device or address
Aug  3 15:11:03 R01 bfdd[100847]: [VJ3VQ-JZYHV] BFD: getting peer's mac failed error No such device or address
Aug  3 15:11:04 R01 bfdd[100847]: [VJ3VQ-JZYHV] BFD: getting peer's mac failed error No such device or address
Aug  3 15:11:04 R01 bfdd[100847]: [VJ3VQ-JZYHV] BFD: getting peer's mac failed error No such device or address
Aug  3 15:11:04 R01 bfdd[100847]: [VJ3VQ-JZYHV] BFD: getting peer's mac failed error No such device or address
Aug  3 15:11:05 R01 bfdd[100847]: [VJ3VQ-JZYHV] BFD: getting peer's mac failed error No such device or address
Aug  3 15:11:05 R01 bfdd[100847]: [VJ3VQ-JZYHV] BFD: getting peer's mac failed error No such device or address
Aug  3 15:11:05 R01 bfdd[100847]: [VJ3VQ-JZYHV] BFD: getting peer's mac failed error No such device or address
Aug  3 15:11:05 R01 bfdd[100847]: [VJ3VQ-JZYHV] BFD: getting peer's mac failed error No such device or address
Aug  3 15:11:06 R01 bfdd[100847]: [VJ3VQ-JZYHV] BFD: getting peer's mac failed error No such device or address
Aug  3 15:11:06 R01 bfdd[100847]: [VJ3VQ-JZYHV] BFD: getting peer's mac failed error No such device or address
Aug  3 15:11:06 R01 bfdd[100847]: [VJ3VQ-JZYHV] BFD: getting peer's mac failed error No such device or address
Aug  3 15:11:06 R01 bfdd[100847]: [VJ3VQ-JZYHV] BFD: getting peer's mac failed error No such device or address
Aug  3 15:11:07 R01 bfdd[100847]: [VJ3VQ-JZYHV] BFD: getting peer's mac failed error No such device or address
Aug  3 15:11:07 R01 bfdd[100847]: [VJ3VQ-JZYHV] BFD: getting peer's mac failed error No such device or address

• Did you check if this is a duplicate issue?
• Did you test it on the latest FRRouting/frr master branch?

To Reproduce

Just configure a new IPIP tunnel, add an IP on it and enable OSPF and OSPF BDF:

# ip link add tun100 type ipip mode any local 192.168.1.1 remote 192.168.1.2
# ip link set tun100 up
# vtysh
R01# configure
R01(config)# interface tun100
R01(config)# ip address 10.101.1.13/30
R01(config)# ip ospf 1 area 10
R01(config)# ip ospf bfd

Then check the logs and you'll see a bunch of them.

Expected behavior

I'm expecting to not have these logs.

Screenshots

Versions

• OS Version: Debian Bullseye

• Kernel: 5.18.0-2-amd64

• FRR Version: 8.4~dev-1659529096-1~1.gbp356296

Additional context