Setting the learning flag to 1 for a vxlan does nothing more than the kernel
default already does.
Did anyone ever test VXLAN learning usage? See learning flag:
# ip -6 link add vxlan100 type vxlan id 100 dstport 4789 local 2001:db8:1::1
learning
# ip -d a
===
9: vxlan100: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default
qlen 1000
link/ether aa:84:74:b0:4e:1f brd ff:ff:ff:ff:ff:ff promiscuity 0 minmtu 68
maxmtu 65535
vxlan id 100 local 2001:db8:1::1 srcport 0 0 dstport 4789 ttl auto ageing
300 udpcsum noudp6zerocsumtx noudp6zerocsumrx numtxqueues 1 numrxqueues 1
gso_max_size 65536 gso_max_segs 65535
===
learning nowhere to be seen, because... it's enabled by default.
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tree/drivers/net/vxlan/vxlan_core.c?h=v6.11.5#n4136
Remove vxlan
# ip link d vxlan100
Make one with nolearning
# ip -6 link add vxlan100 type vxlan id 100 dstport 4789 local 2001:db8:1::1
nolearning
# ip -d a
===
10: vxlan100: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group
default qlen 1000
link/ether 86:82:c0:14:18:57 brd ff:ff:ff:ff:ff:ff promiscuity 0 minmtu 68
maxmtu 65535
vxlan id 100 local 2001:db8:1::1 srcport 0 0 dstport 4789 nolearning ttl
auto ageing 300 udpcsum noudp6zerocsumtx noudp6zerocsumrx numtxqueues 1
numrxqueues 1 gso_max_size 65536 gso_max_segs 65535
===
nolearning flag present.
Remove vxlan
# ip link d vxlan100
TL:DR: netifd has a useless learning flag. It should be nolearning to DISABLE
learning...?
If I send a patch - what is the recommended way forward? Leave learning and
deprecate it? Replace it with nolearning?
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