Software: Apache/2.4.41 (Ubuntu). PHP/8.0.30 

uname -a: Linux apirnd 5.4.0-204-generic #224-Ubuntu SMP Thu Dec 5 13:38:28 UTC 2024 x86_64 

uid=33(www-data) gid=33(www-data) groups=33(www-data) 

Safe-mode: OFF (not secure)

/usr/src/linux-headers-5.4.0-216/tools/testing/selftests/net/   drwxr-xr-x
Free 13.1 GB of 57.97 GB (22.6%)
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Viewing file:     test_vxlan_fdb_changelink.sh (678 B)      -rwxr-xr-x

#!/bin/bash
# SPDX-License-Identifier: GPL-2.0

# Check FDB default-remote handling across "ip link set".

check_remotes()
{
	local what=$1; shift
	local N=$(bridge fdb sh dev vx | grep 00:00:00:00:00:00 | wc -l)

	echo -ne "expected two remotes after $what\t"
	if [[ $N != 2 ]]; then
		echo "[FAIL]"
		EXIT_STATUS=1
	else
		echo "[ OK ]"
	fi
}

ip link add name vx up type vxlan id 2000 dstport 4789
bridge fdb ap dev vx 00:00:00:00:00:00 dst 192.0.2.20 self permanent
bridge fdb ap dev vx 00:00:00:00:00:00 dst 192.0.2.30 self permanent
check_remotes "fdb append"

ip link set dev vx type vxlan remote 192.0.2.30
check_remotes "link set"

ip link del dev vx
exit $EXIT_STATUS