Hi,
Can you please advise how can I revert the things that OVS did WITHOUT
using the OVS commands, when OVS processes are not running?
I am trying to "move" the IP address from the NIC (eth0) to the OVS
bridge interface. I am doing the following steps:
1. Create OVS bridge "brcnv".
2. Create OVS internal port "port0" and configure it as L3 interface
(configure DHCP client on it)
3. Create OVS port "port1" and attach the NIC interface "eth0" to that port
4. Assign the port "port1" to the bridge "brcnv".
5. Bring up the L3 interface of OVS.
6. Bring down the L3 interface "eth0".
I am using "nmcli" commands in order to configure the previous steps,
following are the commands:
nmcli conn add type ovs-bridge conn.interface brcnv
nmcli conn add type ovs-port conn.interface brcnv-port master brcnv
nmcli conn add type ovs-interface conn.id brcnv-iface conn.interface
brcnv master brcnv-port ipv4.method auto connection.autoconnect no
nmcli conn add type ovs-port conn.interface port1 master brcnv
nmcli conn add type ethernet conn.interface eth0 master port1
nmcli conn down eth0
nmcli conn up brcnv-iface
nmcli conn mode brcnv-iface connection.autoconnect yes
nmcli conn mode eth0 connection.autoconnect no
Here are the relevant outputs:
[root@localhost ~]# ovs-vsctl show
af1e42a3-04e6-48fd-9545-8271a1f0bbfe
Bridge brcnv
Port "port1"
Interface "eth0"
type: system
Port brcnv-port
Interface brcnv
type: internal
ovs_version: "2.9.2"
[root@localhost ~]# nmcli conn
NAME UUID TYPE
DEVICE
brcnv-iface c27717db-2f24-49a6-a3af-3b524b1cb990
ovs-interface brcnv
ovs-bridge-brcnv e8d57b84-3cd3-4a17-b634-608c1dd61ba4 ovs-bridge
brcnv
ovs-slave-brcnv-port e0fc4f3f-5426-4fc6-8f24-dd051e1bf63d ovs-port
brcnv-port
ovs-slave-eth0 4af777a7-4bd4-4d68-9f33-e3b45e7ae46d ethernet
eth0
ovs-slave-port1 b53b74d4-d3f6-4eac-be28-a9c4737a8dfd ovs-port
port1
eth0 3e06d59a-92c5-4ea6-9ec6-ce416df95646 ethernet
--
[root@localhost ~]# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast
master ovs-system state UP group default qlen 1000
link/ether 52:54:00:90:1f:4f brd ff:ff:ff:ff:ff:ff
3: ovs-system: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN
group default qlen 1000
link/ether 42:03:50:51:f7:e6 brd ff:ff:ff:ff:ff:ff
4: brcnv: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue
state UNKNOWN group default qlen 1000
link/ether 3e:4f:21:94:bd:43 brd ff:ff:ff:ff:ff:ff
inet 192.168.122.84/24 brd 192.168.122.255 scope global
noprefixroute dynamic brcnv
valid_lft 3264sec preferred_lft 3264sec
inet6 fe80::8ea4:f24c:119f:a9b5/64 scope link noprefixroute
valid_lft forever preferred_lft forever
I am using VM with one NIC, OS is Centos 7.7.1908
ovs-vsctl (Open vSwitch) 2.9.2
DB Schema 7.15.1
My issue is that when I stop the openvswitch processes using
"systemctl stop openvswitch" I cannot restore the connectivity after
reverting the IP back to "eth0". I have tried both "nmcli" and "ip"
commands:
systemctl stop openvswitch
ip addr flush dev brcnv
ip link set dev brcnv down
ip link set dev eth0 promisc off
ip addr add 192.168.122.70/24 dev eth0
ip link set dev eth0 up
ping 192.168.122.1 (IP of virbr0 on the host OS, no response)
OR
nmcli conn down brcnv-iface
nmcli conn up eth0 (eth0 got IP address from DHCP)
ping 192.168.122.1 (no response)
This issue is solved only when I start the OVS processes and delete
the brcnv using "ovs-vsctl del-br brcnv".
Please advise.
TIA and BR,
Igor
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