fkie_master_discovery: A master can't detect the other one while the other one detects the master
Hello there,
I am new to ROS and robotics and now, i have 2 computers in the same local network which i am trying to make them to talk each other on ROS:
Laptop
- OS: Windows 10
- VM: Linux Ubuntu 20.04 (I am using this for ROS and multimaster)
- Connection Method: Wifi
- IP Address: 192.XXX.XXX.ab (Ip of VM, in the same network with the other computer)
- IP Address: 192.XXX.XXX.ae (original ip of the laptop, same network with the other computers)
- VM Network Configuration: Bridged (So i don't have a changing ip and VM machine is just like any other device in the local network)
- ROS Distro: Noetic
ROS Parameters: Set in ".bashrc" and just like following:
export ROS_HOSTNAME=laptop-linux export ROS_MASTER_URI=http://laptop-linux:11311 export ROS_IP=192.XXX.XXX.ab
Multimaster: fkie_multimaster installed.
/etc/hosts:
127.0.0.1 localhost 127.0.0.1 laptop-linux 192.XXX.XXX.ab laptop-linux 192.XXX.XXX.dc pc-linux
PC
- OS: Linux Ubuntu 18.04 (non-VM)
- VM: None
- Connection Method: Ethernet
- IP Address: 192.XXX.XXX.dc (In the same network with the other computer)
- ROS Distro: Melodic
- ROS Parameters: Set in ".bashrc" and just like following:
export ROS_HOSTNAME=pc-linux export ROS_MASTER_URI=http://pc-linux:11311 export ROS_IP=192.XXX.XXX.dc
Multimaster: fkie_multimaster installed.
/etc/hosts:
127.0.0.1 localhost 127.0.0.1 pc-linux 192.XXX.XXX.ab laptop-linux 192.XXX.XXX.ae laptop-windows 192.XXX.XXX.dc pc-linux
I can ping from both computer to each other. When, i ping i get such an output in laptop-linux:
> From 192.XXX.XXX.ae icmp_seq=1
> Redirect Network(New nexthop:
> cd.XXX.XXX.192) 64 bytes from pc-linux
> (192.XXX.XXX.dc): icmp_seq=1 ttl=64
> time=1.27 ms 64 bytes from pc-linux
> (192.XXX.XXX.dc): icmp_seq=1 ttl=63
> time=1.27 ms (DUP!) 64 bytes from
> pc-linux (192.XXX.XXX.dc): icmp_seq=1
> ttl=64 time=1.49 ms (DUP!) 64 bytes
> from pc-linux (192.XXX.XXX.dc):
> icmp_seq=1 ttl=63 time=1.49 ms (DUP!)
> 1 packets transmitted, 1 received, +3
> duplicates, +1 errors, 0% packet loss
this is the output at the linux-pc:
> From 192.XXX.XXX.ae icmp_seq=1
> Redirect Network(New nexthop:
> laptop-linux (192.XXX.XXX.ab)) 64 bytes from laptop-linux
> (192.XXX.XXX.ab): icmp_seq=1 ttl=64
> time=1.27 ms 64 bytes from laptop-linux
> (192.XXX.XXX.ab): icmp_seq=1 ttl=63
> time=1.27 ms (DUP!) 64 bytes from
> laptop-linux (192.XXX.XXX.ab): icmp_seq=1
> ttl=64 time=1.49 ms (DUP!) 64 bytes
> from laptop-linux (192.XXX.XXX.ab):
> icmp_seq=1 ttl=63 time=1.49 ms (DUP!)
> 1 packets transmitted, 1 received, +3
> duplicates, 0% packet loss
When, i start master_discovery and master_sync on both nodes they start without any issue and when ...