On 11/28/2018 3:15 PM, Siva Teja ARETI wrote:
Hi Greg,
Please find the answers inline below.
On Tue, Nov 27, 2018 at 1:35 PM Gregory Rose <[email protected]
<mailto:[email protected]>> wrote:
Siva,
You have a routing issue.
See interalia
https://github.com/OpenNebula/one/issues/2161
http://wwwaem.brocade.com/content/html/en/brocade-validated-design/brocade-vcs-fabric-ip-storage-bvd/GUID-CB5BFC4D-B2BE-4E9C-BA91-7E7E9BD35FCC.html
http://blog.arunsriraman.com/2017/02/how-to-setting-up-gre-or-vxlan-tunnel.html
For this to work you must be able to ping from the local IP to the
remote IP *through* the remote IP address.As we have seen that
doesn't work.
Did you mean to be able to ping using remote interface? I am able to
get this to work when I connect the two bridges using a veth pair.
[root@vm1 ~]# ping 30.30.0.193 -I eth2
PING 30.30.0.193 (30.30.0.193) from 20.20.0.183 eth2: 56(84) bytes of
data.
64 bytes from 30.30.0.193 <http://30.30.0.193>: icmp_seq=1 ttl=64
time=0.655 ms
64 bytes from 30.30.0.193 <http://30.30.0.193>: icmp_seq=2 ttl=64
time=0.574 ms
64 bytes from 30.30.0.193 <http://30.30.0.193>: icmp_seq=3 ttl=64
time=0.600 ms
64 bytes from 30.30.0.193 <http://30.30.0.193>: icmp_seq=4 ttl=64
time=0.604 ms
64 bytes from 30.30.0.193 <http://30.30.0.193>: icmp_seq=5 ttl=64
time=0.607 ms
64 bytes from 30.30.0.193 <http://30.30.0.193>: icmp_seq=6 ttl=64
time=0.620 ms
64 bytes from 30.30.0.193 <http://30.30.0.193>: icmp_seq=7 ttl=64
time=0.466 ms
64 bytes from 30.30.0.193 <http://30.30.0.193>: icmp_seq=8 ttl=64
time=0.623 ms
^C
--- 30.30.0.193 ping statistics ---
8 packets transmitted, 8 received, 0% packet loss, time 7000ms
rtt min/avg/max/mdev = 0.466/0.593/0.655/0.059 ms
Even with this routing setup, the local_ip option with vxlan tunnels
does not seem to work and GRE tunnels work.
So what you did there with the veth pair is not routing, it's bridging.
As an aside, why do you have two bridges to the same VMs? Your
configuration makes it impossible to
set a route because you have two sets of IP addresses and routes
all on two bridges going into the same
VMs. In that configuration the local ip option makes no sense.
You don't need it - you're already bridged.
I was to trying to mimic a use case with two hypervisors and each
hypervisor is connected to two different underlay networks. So, used
linux bridges when imitated the topology with VMs. Please advice if
this is not the right approach.
I don't see how that can work - there does not seem to be enough
isolation. The VMs are still connected to
a single hypervisor and they're all bridged, not routed.
I understand that you have seen the gre configuration work and I'm
not sure why because it has the same
requirements for the local ip to be routable through the remote
ip. And again, there is no point to the
local ip option because the ip addresses do not need to be routed
to reach each other.
In any case, I'm going to set up a valid configuration and then
make sure that the local ip option does work
or not. I'll report back when I'm done.
I will look out for your conclusions.
So I have gotten both gre and vxlan to work with the local_ip option.
Below is my setup for vxlan. The one for gre is identical except it is
gre tunneling instead of vxlan tunneling.
I've highlighted in red notable configurations and IP addresses. With
this setup I can do this:
From Machine B to Machine A:
# ip netns exec ns0 ping 10.1.1.1
PING 10.1.1.1 (10.1.1.1) 56(84) bytes of data.
64 bytes from 10.1.1.1: icmp_seq=1 ttl=64 time=0.966 ms
64 bytes from 10.1.1.1: icmp_seq=2 ttl=64 time=0.128 ms
64 bytes from 10.1.1.1: icmp_seq=3 ttl=64 time=0.116 ms
64 bytes from 10.1.1.1: icmp_seq=4 ttl=64 time=0.113 ms
64 bytes from 10.1.1.1: icmp_seq=5 ttl=64 time=0.155 ms
64 bytes from 10.1.1.1: icmp_seq=6 ttl=64 time=0.124 ms
64 bytes from 10.1.1.1: icmp_seq=7 ttl=64 time=0.133 ms
As you can see the vxlan tunnel with local_ip option works fine when the
base configuration is done
correctly. I think a lot of confusion in this case has been between
bridging and routing. They are
really separate concepts.
I hope this helps.
Thanks,
- Greg
Setup follows:
Machine A:
# ovs-vsctl show
e4490ab5-ba93-4291-8a4f-c6f71292310b
Bridge br-test
* Port "vxlan0"
Interface "vxlan0"
type: vxlan
** options: {key="100", local_ip="201.20.20.1",
remote_ip="200.0.0.2"}*
Port "p1"
Interface "p1"
Port br-test
Interface br-test
type: internal
Bridge "br0"
Port "br0-peer"
Interface "br0-peer"
type: patch
options: {peer="br1-peer"}
Port "em2"
Interface "em2"
Port "br0"
Interface "br0"
type: internal
Bridge "br1"
Port "br1-peer"
Interface "br1-peer"
type: patch
options: {peer="br0-peer"}
Port "br1"
Interface "br1"
type: internal
Port br-test-patch
Interface br-test-patch
type: patch
options: {peer="br1-patch"}
ovs_version: "2.10.90"
# ip addr show
5: em2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq master
ovs-system state UP group default qlen 1000
link/ether 24:6e:96:4a:f2:90 brd ff:ff:ff:ff:ff:ff
12: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state
UNKNOWN group default qlen 1000
link/ether 24:6e:96:4a:f2:90 brd ff:ff:ff:ff:ff:ff
* inet 201.20.20.1/24 scope global br0*
valid_lft forever preferred_lft forever
inet6 fd01:1:3:1500:266e:96ff:fe4a:f290/64 scope global mngtmpaddr
dynamic
valid_lft forever preferred_lft forever
inet6 fe80::266e:96ff:fe4a:f290/64 scope link
valid_lft forever preferred_lft forever
14: br1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state
UNKNOWN group default qlen 1000
link/ether 6a:f6:c5:75:3f:44 brd ff:ff:ff:ff:ff:ff
inet 201.20.20.9/24 scope global br1
valid_lft forever preferred_lft forever
inet6 fd01:1:3:1500:68f6:c5ff:fe75:3f44/64 scope global mngtmpaddr
dynamic
valid_lft forever preferred_lft forever
inet6 fe80::68f6:c5ff:fe75:3f44/64 scope link
valid_lft forever preferred_lft forever
18: p1@if19: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue
master ovs-system state UP group default qlen 1000
link/ether c2:00:b3:6c:d4:08 brd ff:ff:ff:ff:ff:ff link-netnsid 0
inet6 fe80::c000:b3ff:fe6c:d408/64 scope link
valid_lft forever preferred_lft forever
23: br-test: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group
default qlen 1000
link/ether 9a:61:c4:03:30:46 brd ff:ff:ff:ff:ff:ff
25: vxlan_sys_4789: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 65470 qdisc
noqueue master ovs-system state UNKNOWN group default qlen 1000
link/ether 2e:a5:e4:4c:38:0f brd ff:ff:ff:ff:ff:ff
inet6 fe80::2ca5:e4ff:fe4c:380f/64 scope link
valid_lft forever preferred_lft forever
# ip route show
default via 10.172.211.253 dev em1 proto dhcp metric 100
10.172.208.0/22 dev em1 proto kernel scope link src 10.172.208.214
metric 100
192.168.122.0/24 dev virbr0 proto kernel scope link src 192.168.122.1
*200.0.0.0/24 via 201.20.20.1 dev br0*
201.20.20.0/24 dev br0 proto kernel scope link src 201.20.20.1
201.20.20.0/24 dev br1 proto kernel scope link src 201.20.20.9
# ip netns exec ns0 ip addr show
19: v1@if18: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue
state UP group default qlen 1000
link/ether 16:14:b4:4e:06:8a brd ff:ff:ff:ff:ff:ff link-netnsid 0
* inet 10.1.1.1/24 scope global v1*
valid_lft forever preferred_lft forever
inet6 fe80::1414:b4ff:fe4e:68a/64 scope link
valid_lft forever preferred_lft forever
Machine B:
# ovs-vsctl show
021ce205-1cb1-441e-af92-f0316fe68f80
Bridge "br1"
Port "br1-peer"
Interface "br1-peer"
type: patch
options: {peer="br0-peer"}
Port "br1"
Interface "br1"
type: internal
Port br-test-patch
Interface br-test-patch
type: patch
options: {peer="br1-patch"}
Bridge "br0"
Port "em2"
Interface "em2"
Port "br0-peer"
Interface "br0-peer"
type: patch
options: {peer="br1-peer"}
Port "br0"
Interface "br0"
type: internal
Bridge br-test
* Port "vxlan0"
Interface "vxlan0"
type: vxlan
options: {key="100", local_ip="200.0.0.2",
remote_ip="201.20.20.1"}
* Port br-test
Interface br-test
type: internal
Port "p1"
Interface "p1"
ovs_version: "2.10.90"
# ip addr show
5: em2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq master
ovs-system state UP group default qlen 1000
link/ether 24:6e:96:4a:ec:b8 brd ff:ff:ff:ff:ff:ff
12: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state
UNKNOWN group default qlen 1000
link/ether 24:6e:96:4a:ec:b8 brd ff:ff:ff:ff:ff:ff
* inet 200.0.0.2/24 scope global br0*
valid_lft forever preferred_lft forever
inet6 fd01:1:3:1500:266e:96ff:fe4a:ecb8/64 scope global mngtmpaddr
dynamic
valid_lft forever preferred_lft forever
inet6 fe80::266e:96ff:fe4a:ecb8/64 scope link
valid_lft forever preferred_lft forever
14: br1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state
UNKNOWN group default qlen 1000
link/ether 7a:fd:5c:43:fc:48 brd ff:ff:ff:ff:ff:ff
inet 200.0.0.9/24 scope global br1
valid_lft forever preferred_lft forever
inet6 fd01:1:3:1500:78fd:5cff:fe43:fc48/64 scope global mngtmpaddr
dynamic
valid_lft forever preferred_lft forever
inet6 fe80::78fd:5cff:fe43:fc48/64 scope link
valid_lft forever preferred_lft forever
18: p1@if19: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue
master ovs-system state UP group default qlen 1000
link/ether 92:c3:d0:65:82:0d brd ff:ff:ff:ff:ff:ff link-netnsid 0
inet6 fe80::90c3:d0ff:fe65:820d/64 scope link
valid_lft forever preferred_lft forever
23: br-test: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group
default qlen 1000
link/ether 5a:fc:3c:e9:1d:44 brd ff:ff:ff:ff:ff:ff
25: vxlan_sys_4789: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 65470 qdisc
noqueue master ovs-system state UNKNOWN group default qlen 1000
link/ether de:dd:e8:9a:88:a3 brd ff:ff:ff:ff:ff:ff
inet6 fe80::dcdd:e8ff:fe9a:88a3/64 scope link
valid_lft forever preferred_lft forever
# ip route show
default via 10.172.211.253 dev em1 proto dhcp metric 100
10.172.208.0/22 dev em1 proto kernel scope link src 10.172.208.215
metric 100
192.168.122.0/24 dev virbr0 proto kernel scope link src 192.168.122.1
200.0.0.0/24 dev br0 proto kernel scope link src 200.0.0.2
200.0.0.0/24 dev br1 proto kernel scope link src 200.0.0.9
*201.20.20.0/24 via 200.0.0.2 dev br0*
# ip netns exec ns0 ip addr show
19: v1@if18: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue
state UP group default qlen 1000
link/ether 6e:bd:8e:8c:e9:45 brd ff:ff:ff:ff:ff:ff link-netnsid 0
* inet 10.1.1.2/24 scope global v1*
valid_lft forever preferred_lft forever
inet6 fe80::6cbd:8eff:fe8c:e945/64 scope link
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