Did you confirm that the openvswitch agent is running on that host? Run
'neutron agent-list' to make sure it's active. If it is, check the neutron
agent log (usually something like /var/log/neutron/openvswitch-agent.log)
for exceptions to see if it was having issues binding the port.
On Wed, Mar 4, 2015 at 4:14 PM, Mitchell Chen <mitchell.c...@mediatek.com>
wrote:
> The 172.29.106.254 is the default gateway of both my neutron and control
> nodes. I can ping the 105 subnet from both neutron and control nodes:
>
> root@neutron:~# ping -c 4 172.29.105.254
> PING 172.29.105.254 (172.29.105.254) 56(84) bytes of data.
> 64 bytes from 172.29.105.254: icmp_seq=1 ttl=63 time=1.83 ms
> 64 bytes from 172.29.105.254: icmp_seq=2 ttl=63 time=1.80 ms
> 64 bytes from 172.29.105.254: icmp_seq=3 ttl=63 time=1.80 ms
> 64 bytes from 172.29.105.254: icmp_seq=4 ttl=63 time=1.82 ms
>
> --- 172.29.105.254 ping statistics ---
> 4 packets transmitted, 4 received, 0% packet loss, time 3005ms
>
> >>>Is there a route on that device (static/local) that would allow you to
> reach the 172.29.105.0/24 subnet? Are you able to ping the ext-net
> gateway (172.29.105.254) from within the router namespace?
>
> No, the ext-net gateway (172.29.105.254) can not be pinged within the
> router namespace: (Is this right way to ping?)
> root@ neutron:~# ip netns exec
> qrouter-09800b9c-7f2e-40d7-94e5-09e8f73d0302 ping -I qg-6849da02-da
> 172.29.105.254
> PING 172.29.105.254 (172.29.105.254) from 172.29.105.101 qg-6849da02-da:
> 56(84) bytes of data.
> From 172.29.105.101 icmp_seq=1 Destination Host Unreachable
> From 172.29.105.101 icmp_seq=2 Destination Host Unreachable
> From 172.29.105.101 icmp_seq=3 Destination Host Unreachable
> From 172.29.105.101 icmp_seq=4 Destination Host Unreachable
> From 172.29.105.101 icmp_seq=5 Destination Host Unreachable
> From 172.29.105.101 icmp_seq=6 Destination Host Unreachable
>
> >>> It means that tap is stale. You can see if there is still a
> corresponding Neutron port with “neutron port-list | grep 27dd1b25-62”.
>
> Yes, there is corresponding port, bit it's status down
>
> root@control:# neutron port-list | grep 27dd1b25-62
> | 27dd1b25-621a-475f-9398-cf8e4d33a7d7 | | fa:16:3e:49:c7:00 |
> {"subnet_id": "33d60404-d979-4b63-83ef-653268195872", "ip_address":
> "192.168.2.2"} |
>
> root@control:# neutron port-show 27dd1b25-621a-475f-9398-cf8e4d33a7d7
>
> +-----------------------+------------------------------------------------------------------------------------+
> | Field | Value
> |
>
> +-----------------------+------------------------------------------------------------------------------------+
> | admin_state_up | True
> |
> | allowed_address_pairs |
> |
> | binding:vnic_type | normal
> |
> | device_id |
> dhcp0416e1db-8834-5f05-9716-ee162a01eef2-95f5f75f-577f-4827-b51c-f949fb46393b
> |
> | device_owner | network:dhcp
> |
> | extra_dhcp_opts |
> |
> | fixed_ips | {"subnet_id":
> "33d60404-d979-4b63-83ef-653268195872", "ip_address": "192.168.2.2"} |
> | id | 27dd1b25-621a-475f-9398-cf8e4d33a7d7
> |
> | mac_address | fa:16:3e:49:c7:00
> |
> | name |
> |
> | network_id | 95f5f75f-577f-4827-b51c-f949fb46393b
> |
> | security_groups |
> |
> | status | DOWN
> |
> | tenant_id | 1bc3de8b19384858a1a7a6395e1845e3
> |
>
> +-----------------------+------------------------------------------------------------------------------------+
>
> -----Original Message-----
> From: James Denton [mailto:james.den...@rackspace.com]
> Sent: Wednesday, March 04, 2015 2:19 PM
> To: Mitchell Chen
> Cc: openstack@lists.openstack.org
> Subject: Re: [Openstack] Can not ping the tenant router gateway from host
>
> Hi Mitchell,
>
> >> I am able to ping from router to the router gateway (172.29.105.101)
> >> and router to internal tenant gateway (192.168.2.1)
>
> You are pinging these IPs within the router namespace, which I would
> expect to work, as those are the IPs configured on the router’s interfaces.
>
> >> … but still can not ping from control node to the router gateway
>
> The default route of your Neutron host appears to be 172.29.106.254. Is
> that also the case for the control host?
>
> >> default via 172.29.106.254 dev eth0
>
> Is there a route on that device (static/local) that would allow you to
> reach the 172.29.105.0/24 subnet? Are you able to ping the ext-net
> gateway (172.29.105.254) from within the router namespace?
>
> >> I saw there is a tag 4095 in the tap port of the br-int bridge. Is this
> OK?
>
> It means that tap is stale. You can see if there is still a corresponding
> Neutron port with “neutron port-list | grep 27dd1b25-62”.
>
> James
>
> > On Mar 4, 2015, at 3:03 PM, Mitchell Chen <mitchell.c...@mediatek.com>
> wrote:
> >
> > Hi All,
> >
> > I am struggling with not being able to ping the router gateway. I am
> able to ping from router to the router gateway (172.29.105.101) and router
> to internal tenant gateway (192.168.2.1), but still can not ping from
> control node to the router gateway. I am using GRE tunneling. I saw there
> is a tag 4095 in the tap port of the br-int bridge. Is this OK? Please
> advise. From the following data, is there a way to debug the issue?
> >
> > Thanks,
> > Mitchell
> >
> >
> > root@control:~# ovs-vsctl show
> > f22d3ba4-d785-4fe7-a283-16ffbc75c434
> > Bridge br-int
> > fail_mode: secure
> > Port "qr-784a2f1c-e6"
> > tag: 1
> > Interface "qr-784a2f1c-e6"
> > type: internal
> > Port "tap27dd1b25-62"
> > tag: 4095
> > Interface "tap27dd1b25-62"
> > type: internal
> > Port br-int
> > Interface br-int
> > type: internal
> > Port patch-tun
> > Interface patch-tun
> > type: patch
> > options: {peer=patch-int}
> > Bridge br-tun
> > Port patch-int
> > Interface patch-int
> > type: patch
> > options: {peer=patch-tun}
> > Port "gre-c0a801cc"
> > Interface "gre-c0a801cc"
> > type: gre
> > options: {in_key=flow, local_ip="192.168.1.220",
> out_key=flow, remote_ip="192.168.1.204"}
> > Port "gre-c0a801d5"
> > Interface "gre-c0a801d5"
> > type: gre
> > options: {in_key=flow, local_ip="192.168.1.220",
> out_key=flow, remote_ip="192.168.1.213"}
> > Port br-tun
> > Interface br-tun
> > type: internal
> > Port "gre-c0a801d2"
> > Interface "gre-c0a801d2"
> > type: gre
> > options: {in_key=flow, local_ip="192.168.1.220",
> out_key=flow, remote_ip="192.168.1.210"}
> > Bridge br-ex
> > Port "qg-6849da02-da"
> > Interface "qg-6849da02-da"
> > type: internal
> > Port br-ex
> > Interface br-ex
> > type: internal
> > Port "eth2"
> > Interface "eth2"
> > ovs_version: "2.0.2"
> >
> > root@control:~# ovs-ofctl dump-flows br-int NXST_FLOW reply (xid=0x4):
> > cookie=0x0, duration=55.846s, table=0, n_packets=2, n_bytes=214,
> > idle_age=8, priority=1 actions=NORMAL cookie=0x0, duration=55.649s,
> > table=22, n_packets=0, n_bytes=0, idle_age=55, priority=0 actions=drop
> >
> > root@ control:~# ovs-ofctl dump-flows br-tun NXST_FLOW reply
> > (xid=0x4):
> > cookie=0x0, duration=66.836s, table=0, n_packets=0, n_bytes=0,
> > idle_age=66, priority=1,in_port=3 actions=resubmit(,2) cookie=0x0,
> > duration=68.694s, table=0, n_packets=0, n_bytes=0, idle_age=68,
> > priority=1,in_port=1 actions=resubmit(,1) cookie=0x0,
> > duration=66.545s, table=0, n_packets=0, n_bytes=0, idle_age=66,
> > priority=1,in_port=4 actions=resubmit(,2) cookie=0x0,
> > duration=67.159s, table=0, n_packets=32, n_bytes=5592, idle_age=1,
> > priority=1,in_port=2 actions=resubmit(,2) cookie=0x0, duration=68.59s,
> > table=0, n_packets=5, n_bytes=390, idle_age=59, priority=0
> > actions=drop cookie=0x0, duration=68.495s, table=1, n_packets=0,
> > n_bytes=0, idle_age=68,
> > priority=1,dl_dst=00:00:00:00:00:00/01:00:00:00:00:00
> > actions=resubmit(,20) cookie=0x0, duration=68.391s, table=1,
> > n_packets=0, n_bytes=0, idle_age=68,
> > priority=1,dl_dst=01:00:00:00:00:00/01:00:00:00:00:00
> > actions=resubmit(,21) cookie=0x0, duration=64.686s, table=2,
> > n_packets=32, n_bytes=5592, idle_age=1, priority=1,tun_id=0x2
> > actions=mod_vlan_vid:1,resubmit(,10)
> > cookie=0x0, duration=68.293s, table=2, n_packets=0, n_bytes=0,
> > idle_age=68, priority=0 actions=drop cookie=0x0, duration=68.193s,
> > table=3, n_packets=0, n_bytes=0, idle_age=68, priority=0 actions=drop
> > cookie=0x0, duration=68.082s, table=10, n_packets=32, n_bytes=5592,
> > idle_age=1, priority=1
> > actions=learn(table=20,hard_timeout=300,priority=1,NXM_OF_VLAN_TCI[0..
> > 11],NXM_OF_ETH_DST[]=NXM_OF_ETH_SRC[],load:0->NXM_OF_VLAN_TCI[],load:N
> > XM_NX_TUN_ID[]->NXM_NX_TUN_ID[],output:NXM_OF_IN_PORT[]),output:1
> > cookie=0x0, duration=56.741s, table=20, n_packets=0, n_bytes=0,
> > hard_timeout=300, idle_age=56, hard_age=1,
> > priority=1,vlan_tci=0x0001/0x0fff,dl_dst=b2:a9:8f:0a:42:fb
> > actions=load:0->NXM_OF_VLAN_TCI[],load:0x2->NXM_NX_TUN_ID[],output:2
> > cookie=0x0, duration=22.544s, table=20, n_packets=0, n_bytes=0,
> > hard_timeout=300, idle_age=22, hard_age=9,
> > priority=1,vlan_tci=0x0001/0x0fff,dl_dst=62:bb:fb:a4:92:db
> > actions=load:0->NXM_OF_VLAN_TCI[],load:0x2->NXM_NX_TUN_ID[],output:2
> > cookie=0x0, duration=67.982s, table=20, n_packets=0, n_bytes=0,
> > idle_age=67, priority=0 actions=resubmit(,21) cookie=0x0,
> > duration=64.782s, table=21, n_packets=0, n_bytes=0, idle_age=64,
> > dl_vlan=1 actions=strip_vlan,set_tunnel:0x2,output:4,output:3,output:2
> > cookie=0x0, duration=67.87s, table=21, n_packets=0, n_bytes=0,
> > idle_age=67, priority=0 actions=drop
> >
> > root@ control:~# ovs-ofctl dump-flows br-ex NXST_FLOW reply (xid=0x4):
> > cookie=0x0, duration=558.95s, table=0, n_packets=479, n_bytes=102435,
> > idle_age=10, priority=0 actions=NORMAL
> >
> > root@neutron:~# ip netns
> > qrouter-09800b9c-7f2e-40d7-94e5-09e8f73d0302
> > qdhcp-95f5f75f-577f-4827-b51c-f949fb46393b
> > root@mussdhux20:~# ip netns exec
> > qrouter-09800b9c-7f2e-40d7-94e5-09e8f73d0302 ip a
> > 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
> group default
> > 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: qr-784a2f1c-e6: <BROADCAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state
> UNKNOWN group default
> > link/ether fa:16:3e:d2:db:51 brd ff:ff:ff:ff:ff:ff
> > inet 192.168.2.1/24 brd 192.168.2.255 scope global qr-784a2f1c-e6
> > valid_lft forever preferred_lft forever
> > inet6 fe80::f816:3eff:fed2:db51/64 scope link
> > valid_lft forever preferred_lft forever
> > 15: qg-6849da02-da: <BROADCAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state
> UNKNOWN group default
> > link/ether fa:16:3e:15:c8:76 brd ff:ff:ff:ff:ff:ff
> > inet 172.29.105.101/24 brd 172.29.105.255 scope global
> qg-6849da02-da
> > valid_lft forever preferred_lft forever
> > inet 172.29.105.102/32 brd 172.29.105.102 scope global
> qg-6849da02-da
> > valid_lft forever preferred_lft forever
> > inet6 fe80::f816:3eff:fe15:c876/64 scope link
> > valid_lft forever preferred_lft forever
> >
> > /// I can ping from router to external router gateway root@ neutron:~#
> > ip netns exec qrouter-09800b9c-7f2e-40d7-94e5-09e8f73d0302 ping -I
> qg-6849da02-da 172.29.105.101
> > PING 172.29.105.101 (172.29.105.101) from 172.29.105.101 qg-6849da02-da:
> 56(84) bytes of data.
> > 64 bytes from 172.29.105.101: icmp_seq=1 ttl=64 time=0.067 ms
> > 64 bytes from 172.29.105.101: icmp_seq=2 ttl=64 time=0.048 ms
> > 64 bytes from 172.29.105.101: icmp_seq=3 ttl=64 time=0.062 ms
> > 64 bytes from 172.29.105.101: icmp_seq=4 ttl=64 time=0.051 ms
> > 64 bytes from 172.29.105.101: icmp_seq=5 ttl=64 time=0.061 ms
> > 64 bytes from 172.29.105.101: icmp_seq=6 ttl=64 time=0.050 ms ^C
> > --- 172.29.105.101 ping statistics ---
> > 6 packets transmitted, 6 received, 0% packet loss, time 4998ms rtt
> > min/avg/max/mdev = 0.048/0.056/0.067/0.010 ms
> >
> > /// I can ping from router to internal tenant gateway
> > root@mussdhux20:~# ip netns exec
> qrouter-09800b9c-7f2e-40d7-94e5-09e8f73d0302 ping -I qr-784a2f1c-e6
> 192.168.2.1
> > PING 192.168.2.1 (192.168.2.1) from 192.168.2.1 qr-784a2f1c-e6: 56(84)
> bytes of data.
> > 64 bytes from 192.168.2.1: icmp_seq=1 ttl=64 time=0.045 ms
> > 64 bytes from 192.168.2.1: icmp_seq=2 ttl=64 time=0.047 ms
> > 64 bytes from 192.168.2.1: icmp_seq=3 ttl=64 time=0.064 ms
> > 64 bytes from 192.168.2.1: icmp_seq=4 ttl=64 time=0.049 ms
> > 64 bytes from 192.168.2.1: icmp_seq=5 ttl=64 time=0.056 ms
> > 64 bytes from 192.168.2.1: icmp_seq=6 ttl=64 time=0.044 ms ^C
> > --- 192.168.2.1 ping statistics ---
> > 6 packets transmitted, 6 received, 0% packet loss, time 4998ms rtt
> > min/avg/max/mdev = 0.044/0.050/0.064/0.011 ms
> >
> > root@ neutron:~# ip a
> > 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
> group default
> > 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: eth2: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc
> pfifo_fast master ovs-system state UP group default qlen 1000
> > link/ether 00:d0:b7:9d:be:de brd ff:ff:ff:ff:ff:ff
> > inet6 fe80::2d0:b7ff:fe9d:bede/64 scope link
> > valid_lft forever preferred_lft forever
> > 3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast
> state UP group default qlen 1000
> > link/ether 00:02:b3:ea:fd:36 brd ff:ff:ff:ff:ff:ff
> > inet 192.168.1.220/24 brd 192.168.1.255 scope global eth1
> > valid_lft forever preferred_lft forever
> > inet6 fe80::202:b3ff:feea:fd36/64 scope link
> > valid_lft forever preferred_lft forever
> > 4: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast
> state UP group default qlen 1000
> > link/ether 00:0f:fe:5e:2b:52 brd ff:ff:ff:ff:ff:ff
> > inet 172.29.106.220/24 brd 172.29.106.255 scope global eth0
> > valid_lft forever preferred_lft forever
> > inet6 fe80::20f:feff:fe5e:2b52/64 scope link
> > valid_lft forever preferred_lft forever
> > 5: ovs-system: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN
> group default
> > link/ether 42:ad:09:62:3e:ff brd ff:ff:ff:ff:ff:ff
> > 6: br-ex: <BROADCAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN
> group default
> > link/ether 00:d0:b7:9d:be:de brd ff:ff:ff:ff:ff:ff
> > inet6 fe80::4460:3dff:fe54:774a/64 scope link
> > valid_lft forever preferred_lft forever
> > 9: br-int: <BROADCAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN
> group default
> > link/ether 0e:51:a9:81:c8:4b brd ff:ff:ff:ff:ff:ff
> > inet6 fe80::50b6:6dff:fe2b:497f/64 scope link
> > valid_lft forever preferred_lft forever
> > 17: br-tun: <BROADCAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN
> group default
> > link/ether 96:20:ae:89:c4:49 brd ff:ff:ff:ff:ff:ff
> > inet6 fe80::14bd:19ff:fe80:55f7/64 scope link
> > valid_lft forever preferred_lft forever
> >
> > root@ neutron:~# ip route
> > default via 172.29.106.254 dev eth0
> > 169.254.0.0/16 dev eth1 scope link metric 1000
> > 172.29.106.0/24 dev eth0 proto kernel scope link src 172.29.106.220
> > 192.168.1.0/24 dev eth1 proto kernel scope link src 192.168.1.220
> >
> > > > root@control# neutron net-list
> >
> +--------------------------------------+----------+------------------------------------------------------+
> > | id | name | subnets
> |
> >
> +--------------------------------------+----------+------------------------------------------------------+
> > | 95f5f75f-577f-4827-b51c-f949fb46393b | demo-net |
> > | 33d60404-d979-4b63-83ef-653268195872 192.168.2.0/24 |
> > | e567fd9d-f87a-491c-b8f1-32d28de4069e | ext-net |
> > | 0f5d2be9-74b0-466e-b0e6-4be8f646338a 172.29.105.0/24 |
> >
> +--------------------------------------+----------+------------------------------------------------------+
> > root control # neutron subnet-list
> >
> +--------------------------------------+-------------+-----------------+------------------------------------------------------+
> > | id | name | cidr |
> allocation_pools |
> >
> +--------------------------------------+-------------+-----------------+------------------------------------------------------+
> > | 0f5d2be9-74b0-466e-b0e6-4be8f646338a | ext-subnet | 172.29.105.0/24
> | {"start": "172.29.105.101", "end": "172.29.105.127"} |
> > | 33d60404-d979-4b63-83ef-653268195872 | demo-subnet | 192.168.2.0/24
> | {"start": "192.168.2.2", "end": "192.168.2.254"} |
> >
> +--------------------------------------+-------------+-----------------+------------------------------------------------------+
> > > >
> > > > root@ control# neutron subnet-show ext-subnet
> >
> +------------------+------------------------------------------------------+
> > | Field | Value
> |
> >
> +------------------+------------------------------------------------------+
> > | allocation_pools | {"start": "172.29.105.101", "end":
> "172.29.105.127"} |
> > | cidr | 172.29.105.0/24
> |
> > | dns_nameservers |
> |
> > | enable_dhcp | False
> |
> > | gateway_ip | 172.29.105.254
> |
> > | host_routes |
> |
> > | id | 0f5d2be9-74b0-466e-b0e6-4be8f646338a
> |
> > | ip_version | 4
> |
> > | name | ext-subnet
> |
> > | network_id | e567fd9d-f87a-491c-b8f1-32d28de4069e
> |
> > | tenant_id | 7479d4eabeb14b45a7f38269155ec0f5
> |
> >
> +------------------+------------------------------------------------------+
> > > > root@ control# neutron subnet-show demo-subnet
> > +------------------+--------------------------------------------------+
> > | Field | Value |
> > +------------------+--------------------------------------------------+
> > | allocation_pools | {"start": "192.168.2.2", "end": "192.168.2.254"} |
> > | cidr | 192.168.2.0/24 |
> > | dns_nameservers | 8.8.8.8 |
> > | enable_dhcp | True |
> > | gateway_ip | 192.168.2.1 |
> > | host_routes | |
> > | id | 33d60404-d979-4b63-83ef-653268195872 |
> > | ip_version | 4 |
> > | name | demo-subnet |
> > | network_id | 95f5f75f-577f-4827-b51c-f949fb46393b |
> > | tenant_id | 1bc3de8b19384858a1a7a6395e1845e3 |
> > +------------------+--------------------------------------------------+
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Kevin Benton
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