Hello,

I can't ping my instances that I create on both networks, public and LAN2.

I will try to describe my setup as much as possible.

I am using the stack through devstack. I have 2 VMs runing on CentOS7, one Controller/Network node (os3) and one compute node (os1). The two VMs can ping with each other.

I created a network and I launched a CirrOS instances on it. I got the error on the log: (Already some threads about it and very obscure fixes..)

udhcpc (v1.18.5) started 
Sending discover... 
Sending discover... 
Sending discover... 
No lease, failing 
WARN: /etc/rc3.d/S40network failed

My instance doesn't get any IP. It looks like a DHCP problem.

Well I fix that (obscure) issue by creating a new instance but this time, I did not connect the network on the public one, I have my instance with the IP:

=== network info ===
if-info: lo,up,127.0.0.1,8,::1
if-info: eth0,up,192.168.192.2,20,fe80::f816:3eff:fe8c:8006
ip-route:default via 192.168.192.1 dev eth0 
ip-route:192.168.192.0/20 dev eth0  src 192.168.192.2 
=== datasource: configdrive local ===
instance-id: 5aa9fab2-eb9b-4107-87b7-753831c0f251
name: SmallOnLAN2
availability-zone: nova
local-hostname: smallonlan2.novalocal
launch-index: 0
=== cirros: current=0.3.2 uptime=18.91 ===
=== pinging gateway failed, debugging connection ===
############ debug start ##############
### /etc/init.d/sshd start
Starting dropbear sshd: OK
### ifconfig -a
eth0      Link encap:Ethernet  HWaddr FA:16:3E:8C:80:06  
          inet addr:192.168.192.2  Bcast:192.168.207.255  Mask:255.255.240.0
          inet6 addr: fe80::f816:3eff:fe8c:8006/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:19 errors:0 dropped:0 overruns:0 frame:0
          TX packets:16 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:2080 (2.0 KiB)  TX bytes:1692 (1.6 KiB)

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:16436  Metric:1
          RX packets:1 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:112 (112.0 B)  TX bytes:112 (112.0 B)

### route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         192.168.192.1   0.0.0.0         UG    0      0        0 eth0
192.168.192.0   0.0.0.0         255.255.240.0   U     0      0        0 eth0
### cat /etc/resolv.conf
search openstacklocal
nameserver 192.168.192.3
### ping -c 5 192.168.192.1
PING 192.168.192.1 (192.168.192.1): 56 data bytes

--- 192.168.192.1 ping statistics ---
5 packets transmitted, 0 packets received, 100% packet loss
### pinging nameservers
#### ping -c 5 192.168.192.3
PING 192.168.192.3 (192.168.192.3): 56 data ...