[Openstack] help openvswitch network configuration problems
Nasir Mahmood
nasir.mahmood at gmail.com
Wed Sep 16 06:21:02 UTC 2015
I practical execution, you dont need any IP Address for either br-ex or
the ETH2 interface for external connectivity. This is a bridge and you are
using OVS for maintaining the L2 connectivity, so according to the OS, you
need something like this in your /etc/network/interfaces file
*# external network interface*
*auto eth2*
*iface eth2 inet manual*
* up ip link set dev $IFACE up*
* down ip link set dev $IFACE down*
*no ip is needed on your eth2.*
On Wed, Sep 16, 2015 at 9:54 AM, Akash Gunjal <akgunjal at in.ibm.com> wrote:
> Hi,
>
> In your screen shot I see the IP is still on eth2 port. When you add the
> eth2 to br-ex OVS bridge, you need to move the IP of eth2 to br-ex for the
> connectivity to work.
>
> Regards,
> Akash
>
> [image: Inactive hide details for "applyhhj" ---09/16/2015 07:43:47
> AM---Hi Everyone, I am now configuring openvswitch for openstack cl]"applyhhj"
> ---09/16/2015 07:43:47 AM---Hi Everyone, I am now configuring openvswitch
> for openstack cloud. I have a network node in the clou
>
> From: "applyhhj" <applyhhj at 163.com>
> To: "openstack" <openstack at lists.openstack.org>
> Date: 09/16/2015 07:43 AM
> Subject: [Openstack] help openvswitch network configuration problems
> ------------------------------
>
>
>
>
> Hi Everyone,
> I am now configuring openvswitch for openstack cloud. I have a network
> node in the cloud and it has 3 network cards. When I did as the Openstack
> Install Guidance said to add port eth2, which is the interface that
> connects to the internet in dhcp mode, to the external bridge br-ex, the
> whole network node become disconnected from the internet.
> Here is the network interface file:
>
> *# interfaces(5) file used by ifup(8) and ifdown(8)*
> *auto lo*
> *iface lo inet loopback*
>
> *# management interface*
> *auto eth0*
> *iface eth0 inet static*
> *address 10.0.0.21*
> *netmask 255.255.255.0*
> *#gateway 10.0.0.1*
>
> *# tunnels interface*
> *auto eth1*
> *iface eth1 inet static*
> *address 10.0.1.21*
> *netmask 255.255.255.0*
>
> *# external network interface*
> *auto eth2*
> *iface eth2 inet dhcp*
> * up ip link set dev $IFACE up*
> * down ip link set dev $IFACE down*
>
> After add eth2 to br-ex, ifconfig presents the following configuration:
>
>
>
> Note: A lot of drop in bridge.
>
> Openvswitch configuration:
>
> *# ovs-vsctl show*
> *40981b45-f9ed-478c-8e25-288598238dc3*
> * Bridge br-ex*
> * Port phy-br-ex*
> * Interface phy-br-ex*
> * type: patch*
> * options: {peer=int-br-ex}*
> * Port br-ex*
> * Interface br-ex*
> * type: internal*
> * Port "eth2"*
> * Interface "eth2"*
> * Bridge br-int*
> * fail_mode: secure*
> * Port int-br-ex*
> * Interface int-br-ex*
> * type: patch*
> * options: {peer=phy-br-ex}*
> * Port br-int*
> * Interface br-int*
> * type: internal*
> * Port patch-tun*
> * Interface patch-tun*
> * type: patch*
> * options: {peer=patch-int}*
> * Bridge br-tun*
> * fail_mode: secure*
> * Port br-tun*
> * Interface br-tun*
> * type: internal*
> * Port patch-int*
> * Interface patch-int*
> * type: patch*
> * options: {peer=patch-tun}*
> *ovs_version: "2.3.2"*
>
> *# ovs-ofctl show br-ex*
> *OFPT_FEATURES_REPLY (xid=0x2): dpid:00006c0b8442b1b5*
> *n_tables:254, n_buffers:256*
> *capabilities: FLOW_STATS TABLE_STATS PORT_STATS QUEUE_STATS
> ARP_MATCH_IP*
> *actions: OUTPUT SET_VLAN_VID SET_VLAN_PCP STRIP_VLAN SET_DL_SRC
> SET_DL_DST SET_NW_SRC SET_NW_DST SET_NW_TOS SET_TP_SRC SET_TP_DST ENQUEUE*
> * 1(phy-br-ex): addr: a mac addr*
> * config: 0*
> * state: 0*
> * speed: 0 Mbps now, 0 Mbps max*
> * 2(eth2): addr: mac of eth2*
> * config: 0*
> * state: 0*
> * current: 1GB-FD COPPER AUTO_NEG*
> * advertised: 10MB-HD 10MB-FD 100MB-HD 100MB-FD 1GB-FD COPPER
> AUTO_NEG*
> * supported: 10MB-HD 10MB-FD 100MB-HD 100MB-FD 1GB-FD COPPER
> AUTO_NEG*
> * speed: 1000 Mbps now, 1000 Mbps max*
> * LOCAL(br-ex): addr: mac of eth2*
> * config: 0*
> * state: 0*
> * speed: 0 Mbps now, 0 Mbps max*
> *OFPT_GET_CONFIG_REPLY (xid=0x4): frags=normal miss_send_len=0*
>
> *# ovs-vsctl br-exists br-ex*
> Shows noting
>
> If I remove eth2 from br-ex, then everything goes well.
> By the way I use NAT to connect all other node in the cloud to the
> internet, but even if I cancel NAT noting changes. And also I have enabled
> ipv4 forwarding.
> Any suggestion is warmly welcomed! Thank you very much!!
>
> Regards
> hjh!
>
>
> 2015-09-16
> ------------------------------
>
> applyhhj_______________________________________________
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>
--
Nasir Mahmood
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