I met a same situation.

[cfthnm]

I met a same situation. Here is output of "sudo /var/packages/r8152/scripts/start-stop-status stop"

++ dirname /var/packages/r8152/scripts/start-stop-status

• script_root=/var/packages/r8152/scripts ++ realpath -m /var/packages/r8152/scripts/..
  • package_root=/var/packages/r8152 ++ basename /var/packages/r8152
  • driver_name=r8152
  • driver_root=/var/packages/r8152/target/r8152
  • case $1 in
  • set_interfaces down
  • action=down
  • target_interface_name= ++ ls /sys/class/net
  • all_interface_names='docker0 docker89bac60 eth0 eth1 lo ovs_eth0 ovs-system sit0 syno_ovs_bonds'
  • '[' -n ']'
  • '[' '!' -e /sys/class/net/ ']'
  • for interface_name in ${all_interface_names}
  • [[ -n '' ]]
  • '[' '!' -e /sys/class/net/docker0/device/driver ']'
  • continue
  • for interface_name in ${all_interface_names}
  • [[ -n '' ]]
  • '[' '!' -e /sys/class/net/docker89bac60/device/driver ']'
  • continue
  • for interface_name in ${all_interface_names}
  • [[ -n '' ]]
  • '[' '!' -e /sys/class/net/eth0/device/driver ']' ++ ls -ld /sys/class/net/eth0/device/driver
  • driver_location='lrwxrwxrwx 1 root root 0 Sep 13 01:32 /sys/class/net/eth0/device/driver -> ../../../../bus/pci/drivers/r8168' ++ grep r8152 ++ echo 'lrwxrwxrwx 1 root root 0 Sep 13 01:32 /sys/class/net/eth0/device/driver -> ../../../../bus/pci/drivers/r8168'
  • '[' '!' -z '' ']'
  • for interface_name in ${all_interface_names}
  • [[ -n '' ]]
  • '[' '!' -e /sys/class/net/eth1/device/driver ']' ++ ls -ld /sys/class/net/eth1/device/driver
  • driver_location='lrwxrwxrwx 1 root root 0 Sep 13 01:32 /sys/class/net/eth1/device/driver -> ../../../../bus/pci/drivers/r8168' ++ echo 'lrwxrwxrwx 1 root root 0 Sep 13 01:32 /sys/class/net/eth1/device/driver -> ../../../../bus/pci/drivers/r8168' ++ grep r8152
  • '[' '!' -z '' ']'
  • for interface_name in ${all_interface_names}
  • [[ -n '' ]]
  • '[' '!' -e /sys/class/net/lo/device/driver ']'
  • continue
  • for interface_name in ${all_interface_names}
  • [[ -n '' ]]
  • '[' '!' -e /sys/class/net/ovs_eth0/device/driver ']'
  • continue
  • for interface_name in ${all_interface_names}
  • [[ -n '' ]]
  • '[' '!' -e /sys/class/net/ovs-system/device/driver ']'
  • continue
  • for interface_name in ${all_interface_names}
  • [[ -n '' ]]
  • '[' '!' -e /sys/class/net/sit0/device/driver ']'
  • continue
  • for interface_name in ${all_interface_names}
  • [[ -n '' ]]
  • '[' '!' -e /sys/class/net/syno_ovs_bonds/device/driver ']'
  • continue
  • /sbin/rmmod /var/packages/r8152/target/r8152/r8152.ko rmmod: ERROR: Module r8152 is not currently loaded
  • true
  • '[' -e /var/packages/r8152/target/r8152/usbnet.ko ']'
  • '[' -e /var/packages/r8152/target/r8152/mii.ko ']'
  • exit 0

Output of "sudo /var/packages/r8152/scripts/start-stop-status start"

++ dirname /var/packages/r8152/scripts/start-stop-status

• script_root=/var/packages/r8152/scripts ++ realpath -m /var/packages/r8152/scripts/..
• package_root=/var/packages/r8152 ++ basename /var/packages/r8152
• driver_name=r8152
• driver_root=/var/packages/r8152/target/r8152
• case $1 in
• '[' -e /var/packages/r8152/scripts/apply-memory-setting ']' ++ count_usb_interfaces ++ ls -l /sys/class/net/ ++ grep /usb ++ wc -l
• initial_count=0
• '[' -e /var/packages/r8152/target/r8152/mii.ko ']'
• '[' -e /var/packages/r8152/target/r8152/usbnet.ko ']'
• /sbin/insmod /var/packages/r8152/target/r8152/r8152.ko
• '[' -r /usr/lib/udev/rules.d/51-usb-r8152-net.rules ']' ++ seq 1 60
• for i in seq 1 60 ++ count_usb_interfaces ++ ls -l /sys/class/net/ ++ grep /usb ++ wc -l
• '[' 1 -ne 0 ']'
• break
• set_interfaces up
• action=up
• target_interface_name= ++ ls /sys/class/net
• all_interface_names='docker0 docker89bac60 eth0 eth1 eth2 lo ovs_eth0 ovs-system sit0 syno_ovs_bonds'
• '[' -n ']'
• '[' '!' -e /sys/class/net/ ']'
• for interface_name in ${all_interface_names}
• [[ -n '' ]]
• '[' '!' -e /sys/class/net/docker0/device/driver ']'
• continue
• for interface_name in ${all_interface_names}
• [[ -n '' ]]
• '[' '!' -e /sys/class/net/docker89bac60/device/driver ']'
• continue
• for interface_name in ${all_interface_names}
• [[ -n '' ]]
• '[' '!' -e /sys/class/net/eth0/device/driver ']' ++ ls -ld /sys/class/net/eth0/device/driver
• driver_location='lrwxrwxrwx 1 root root 0 Sep 13 01:32 /sys/class/net/eth0/device/driver -> ../../../../bus/pci/drivers/r8168' ++ grep r8152 ++ echo 'lrwxrwxrwx 1 root root 0 Sep 13 01:32 /sys/class/net/eth0/device/driver -> ../../../../bus/pci/drivers/r8168'
• '[' '!' -z '' ']'
• for interface_name in ${all_interface_names}
• [[ -n '' ]]
• '[' '!' -e /sys/class/net/eth1/device/driver ']' ++ ls -ld /sys/class/net/eth1/device/driver
• driver_location='lrwxrwxrwx 1 root root 0 Sep 13 01:32 /sys/class/net/eth1/device/driver -> ../../../../bus/pci/drivers/r8168' ++ echo 'lrwxrwxrwx 1 root root 0 Sep 13 01:32 /sys/class/net/eth1/device/driver -> ../../../../bus/pci/drivers/r8168' ++ grep r8152
• '[' '!' -z '' ']'
• for interface_name in ${all_interface_names}
• [[ -n '' ]]
• '[' '!' -e /sys/class/net/eth2/device/driver ']' ++ ls -ld /sys/class/net/eth2/device/driver
• driver_location='lrwxrwxrwx 1 root root 0 Sep 13 01:33 /sys/class/net/eth2/device/driver -> ../../../../../../bus/usb/drivers/r8152' ++ echo 'lrwxrwxrwx 1 root root 0 Sep 13 01:33 /sys/class/net/eth2/device/driver -> ../../../../../../bus/usb/drivers/r8152' ++ grep r8152
• '[' '!' -z 'lrwxrwxrwx 1 root root 0 Sep 13 01:33 /sys/class/net/eth2/device/driver -> ../../../../../../bus/usb/drivers/r8152' ']'
• config_file=/etc/sysconfig/network-scripts/ifcfg-eth2
• config_storage_location=/var/packages/r8152/etc/ifcfg-eth2
• '[' -f /etc/sysconfig/network-scripts/ifcfg-eth2 ']'
• '[' up = down ']'
• '[' up = up ']'
• '[' -f /var/packages/r8152/etc/ifcfg-eth2 ']'
• cp /var/packages/r8152/etc/ifcfg-eth2 /etc/sysconfig/network-scripts/ifcfg-eth2
• ifconfig eth2 up
• set_ovs_interface eth2 up
• interface_name=eth2
• action=up
• config_file_ovs=/etc/sysconfig/network-scripts/ifcfg-ovs_eth2
• config_storage_location_ovs=/var/packages/r8152/etc/ifcfg-ovs_eth2
• is_ovs_enable
• '[' '!' -f /usr/syno/etc/synoovs/ovs_reg.conf ']' ++ cat /usr/syno/etc/synoovs/ovs_reg.conf ++ wc -l
• use=1
• '[' 0 -eq 1 ']'
• return 0
• '[' -f /etc/sysconfig/network-scripts/ifcfg-ovs_eth2 ']'
• '[' up = down ']'
• '[' up = up ']'
• '[' -f /var/packages/r8152/etc/ifcfg-ovs_eth2 ']'
• cp /var/packages/r8152/etc/ifcfg-ovs_eth2 /etc/sysconfig/network-scripts/ifcfg-ovs_eth2
• '[' up = up ']'
• ovs-vsctl add-br ovs_eth2
• ovs-vsctl add-port ovs_eth2 eth2 ovs-vsctl: cannot create a port named eth2 because a port named eth2 already exists on bridge ovs_eth0

I do add eth2 to bridge ovs_eth0 manually.

Originally posted by @cfthnm in https://github.com/bb-qq/r8152/issues/240#issuecomment-1244082503