[Rdo-list] [Neutron] router can't ping external gateway

Boris Derzhavets bderzhavets at hotmail.com
Tue May 19 08:47:29 UTC 2015


There is one thing , which I clearly see . It is qrouter-namespace misconfiguration.  There is no qr-xxxxx bridge attached to br-int
Picture , in general, should look like this

ubuntu at ubuntu-System:~$ sudo ip netns exec qrouter-6cb93ddd-2637-449d-8b10-7c07da49ee8c route -n

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         192.168.12.15   0.0.0.0         UG    0      0        0   qg-a753a8f5-c8
10.254.1.0      0.0.0.0         255.255.255.0   U     0      0      0    qr-393d9f71-53
192.168.12.0    0.0.0.0         255.255.255.0   U     0      0        0 qg-a753a8f5-c8

ubuntu at ubuntu-System:~$ sudo ip netns exec qrouter-6cb93ddd-2637-449d-8b10-7c07da49ee8c ifconfig
lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

qg-a753a8f5-c8 Link encap:Ethernet  HWaddr fa:16:3e:a2:11:b4  
          inet addr:192.168.12.150  Bcast:192.168.12.255  Mask:255.255.255.0
          inet6 addr: fe80::f816:3eff:fea2:11b4/64 Scope:Link
          UP BROADCAST RUNNING  MTU:1500  Metric:1
          RX packets:24504 errors:0 dropped:0 overruns:0 frame:0
          TX packets:17367 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:24328699 (24.3 MB)  TX bytes:1443691 (1.4 MB)

qr-393d9f71-53 Link encap:Ethernet  HWaddr fa:16:3e:9e:ec:01  
          inet addr:10.254.1.1  Bcast:10.254.1.255  Mask:255.255.255.0
          inet6 addr: fe80::f816:3eff:fe9e:ec01/64 Scope:Link
          UP BROADCAST RUNNING  MTU:1500  Metric:1
          RX packets:22487 errors:0 dropped:5 overruns:0 frame:0
          TX packets:24736 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:2379287 (2.3 MB)  TX bytes:24338711 (24.3 MB)

I would also advise you to post a question also on ask.openstack.org

Boris.


Date: Tue, 19 May 2015 09:48:58 +0200
From: ichi.sara at gmail.com
To: rdo-list at redhat.com
Subject: [Rdo-list] [Neutron] router can't ping external gateway

Hey people,
I have an issue with my networking. I connected my openstack to an external network I did all the changes required. But still my router can't reach the external gateway.

=====ifcfg-br-ex
DEVICE=br-ex
DEVICETYPE=ovs
TYPE=OVSBridge
BOOTPROTO=static
IPADDR=192.168.5.33
NETMASK=255.255.255.0
ONBOOT=yes
GATEWAY=192.168.5.1
DNS1=8.8.8.8
DNS2=192.168.5.1


====ifcfg-eth0
DEVICE=eth0
HWADDR=00:0c:29:a2:b1:b9
ONBOOT=yes
TYPE=OVSPort
NM_CONTROLLED=yes
DEVICETYPE=ovs
OVS_BRIDGE=br-ex

======[root at localhost ~(keystone_admin)]# ovs-vsctl show
19de58db-509d-4de8-bd88-9222019b13f1
    Bridge br-int
        fail_mode: secure
        Port "tap8652132e-b8"
            tag: 1
            Interface "tap8652132e-b8"
                type: internal
        Port br-int
            Interface br-int
                type: internal
        Port patch-tun
            Interface patch-tun
                type: patch
                options: {peer=patch-int}
    Bridge br-ex
        Port "qg-5f8ebe30-40"
            Interface "qg-5f8ebe30-40"
                type: internal
        Port "eth0"
            Interface "eth0"
        Port br-ex
            Interface br-ex
                type: internal
    Bridge br-tun
        Port "vxlan-c0a80520"
            Interface "vxlan-c0a80520"
                type: vxlan
                options: {df_default="true", in_key=flow, local_ip="192.168.5.33", out_key=flow, remote_ip="192.168.5.32"}
        Port br-tun
            Interface br-tun
                type: internal
        Port patch-int
            Interface patch-int
                type: patch
                options: {peer=patch-tun}
    ovs_version: "2.3.1"

=====[root at localhost ~(keystone_admin)]# ping 192.168.5.1
PING 192.168.5.1 (192.168.5.1) 56(84) bytes of data.
64 bytes from 192.168.5.1: icmp_seq=1 ttl=64 time=1.76 ms
64 bytes from 192.168.5.1: icmp_seq=2 ttl=64 time=1.88 ms
64 bytes from 192.168.5.1: icmp_seq=3 ttl=64 time=1.45 ms
^C
--- 192.168.5.1 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2002ms
rtt min/avg/max/mdev = 1.452/1.699/1.880/0.187 ms
[root at localhost ~(keystone_admin)]#

======[root at localhost ~(keystone_admin)]# ip netns exec qrouter-85fa9459-503d-4996-86f3-6042604fed74 ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
    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
14: qg-5f8ebe30-40: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN
    link/ether fa:16:3e:c2:1b:5e brd ff:ff:ff:ff:ff:ff
    inet 192.168.5.70/24 brd 192.168.5.255 scope global qg-5f8ebe30-40
       valid_lft forever preferred_lft forever
    inet6 fe80::f816:3eff:fec2:1b5e/64 scope link
       valid_lft forever preferred_lft forever
[root at localhost ~(keystone_admin)]#


======[root at localhost ~(keystone_admin)]# ip r
default via 192.168.5.1 dev br-ex
default via 192.168.4.1 dev eth1
169.254.0.0/16 dev eth0  scope link  metric 1002
169.254.0.0/16 dev eth1  scope link  metric 1003
169.254.0.0/16 dev br-ex  scope link  metric 1005
192.168.4.0/24 dev eth1  proto kernel  scope link  src 192.168.4.14
192.168.5.0/24 dev br-ex  proto kernel  scope link  src 192.168.5.33
[root at localhost ~(keystone_admin)]#


======[root at localhost ~(keystone_admin)]# ip netns exec qrouter-85fa9459-503d-4996-86f3-6042604fed74 ip r
default via 192.168.5.1 dev qg-5f8ebe30-40
192.168.5.0/24 dev qg-5f8ebe30-40  proto kernel  scope link  src 192.168.5.70
[root at localhost ~(keystone_admin)]#


======[root at localhost ~(keystone_admin)]# ip netns exec qrouter-85fa9459-503d-4996-86f3-6042604fed74 ping 192.168.5.1
PING 192.168.5.1 (192.168.5.1) 56(84) bytes of data.
^C
--- 192.168.5.1 ping statistics ---
5 packets transmitted, 0 received, 100% packet loss, time 3999ms

any hints??






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