GitHub user akshaybachhav added a comment to the discussion: Virtual machine on different hosts but in same isolated network not able to communicate (can't ping each other).
> @akshaybachhav can you check iptables/firewall rules in the VM? Can you ping > the VR from the VMs? You can try tcpdump on icmp across VMs, and hosts to see > what's failing/dropping the packets. Thanks for your help. We checked the iptables/firewall rules and found below status. It is allowing all traffic by default.  tcpdump command on vm which is on same host as on which VR is present gives below results: 04:54:50.697249 IP ubuntu-dev-vm-1.cs2cloud.internal.ssh > 10.0.1.10.42550: Flags [P.], seq 7368836:7369064, ack 4249, win 1002, options [nop,nop,TS val 718803065 ecr 1773071291], length 228 04:54:50.697511 IP ubuntu-dev-vm-1.cs2cloud.internal.ssh > 10.0.1.10.42550: Flags [P.], seq 7369064:7369468, ack 4249, win 1002, options [nop,nop,TS val 718803066 ecr 1773071291], length 404 04:54:50.697741 IP ubuntu-dev-vm-1.cs2cloud.internal.ssh > 10.0.1.10.42550: Flags [P.], seq 7369468:7369696, ack 4249, win 1002, options [nop,nop,TS val 718803066 ecr 1773071291], length 228 04:54:50.697852 IP 10.0.1.10.42550 > ubuntu-dev-vm-1.cs2cloud.internal.ssh: Flags [.], ack 7369064, win 7689, options [nop,nop,TS val 1773071291 ecr 718803065], length 0 04:54:50.698049 IP ubuntu-dev-vm-1.cs2cloud.internal.ssh > 10.0.1.10.42550: Flags [P.], seq 7369696:7369732, ack 4249, win 1002, options [nop,nop,TS val 718803066 ecr 1773071291], length 36 04:54:50.698306 IP 10.0.1.10.42550 > ubuntu-dev-vm-1.cs2cloud.internal.ssh: Flags [.], ack 7369696, win 7689, options [nop,nop,TS val 1773071292 ecr 718803066], length 0 04:54:50.698437 IP ubuntu-dev-vm-1.cs2cloud.internal.ssh > 10.0.1.10.42550: Flags [P.], seq 7369732:7370512, ack 4249, win 1002, options [nop,nop,TS val 718803067 ecr 1773071292], length 780 04:54:50.698664 IP ubuntu-dev-vm-1.cs2cloud.internal.ssh > 10.0.1.10.42550: Flags [P.], seq 7370512:7370724, ack 4249, win 1002, options [nop,nop,TS val 718803067 ecr 1773071292], length 212 04:54:50.698896 IP ubuntu-dev-vm-1.cs2cloud.internal.ssh > 10.0.1.10.42550: Flags [P.], seq 7370724:7370952, ack 4249, win 1002, options [nop,nop,TS val 718803067 ecr 1773071292], length 228 04:54:50.699027 IP 10.0.1.10.42550 > ubuntu-dev-vm-1.cs2cloud.internal.ssh: Flags [.], ack 7370512, win 7689, options [nop,nop,TS val 1773071293 ecr 718803066], length 0 04:54:50.699164 IP ubuntu-dev-vm-1.cs2cloud.internal.ssh > 10.0.1.10.42550: Flags [P.], seq 7370952:7371180, ack 4249, win 1002, options [nop,nop,TS val 718803067 ecr 1773071293], length 228 04:54:50.699338 IP 10.0.1.10.42550 > ubuntu-dev-vm-1.cs2cloud.internal.ssh: Flags [.], ack 7370952, win 7689, options [nop,nop,TS val 1773071293 ecr 718803067], length 0 04:54:50.699470 IP ubuntu-dev-vm-1.cs2cloud.internal.ssh > 10.0.1.10.42550: Flags [P.], seq 7371180:7371216, ack 4249, win 1002, options [nop,nop,TS val 718803068 ecr 1773071293], length 36 04:54:50.699699 IP ubuntu-dev-vm-1.cs2cloud.internal.ssh > 10.0.1.10.42550: Flags [P.], seq 7371216:7371612, ack 4249, win 1002, options [nop,nop,TS val 718803068 ecr 1773071293], length 396 04:54:50.699953 IP 10.0.1.10.42550 > ubuntu-dev-vm-1.cs2cloud.internal.ssh: Flags [.], ack 7371216, win 7689, options [nop,nop,TS val 1773071294 ecr 718803067], length 0 04:54:50.700080 IP ubuntu-dev-vm-1.cs2cloud.internal.ssh > 10.0.1.10.42550: Flags [P.], seq 7371612:7371840, ack 4249, win 1002, options [nop,nop,TS val 718803068 ecr 1773071294], length 228 04:54:50.700355 IP ubuntu-dev-vm-1.cs2cloud.internal.ssh > 10.0.1.10.42550: Flags [P.], seq 7371840:7372052, ack 4249, win 1002, options [nop,nop,TS val 718803069 ecr 1773071294], length 212 04:54:50.700579 IP 10.0.1.10.42550 > ubuntu-dev-vm-1.cs2cloud.internal.ssh: Flags [.], ack 7371840, win 7689, options [nop,nop,TS val 1773071294 ecr 718803068], length 0 04:54:50.700704 IP ubuntu-dev-vm-1.cs2cloud.internal.ssh > 10.0.1.10.42550: Flags [P.], seq 7372052:7372456, ack 4249, win 1002, options [nop,nop,TS val 718803069 ecr 1773071294], length 404 04:54:50.700968 IP ubuntu-dev-vm-1.cs2cloud.internal.ssh > 10.0.1.10.42550: Flags [P.], seq 7372456:7372684, ack 4249, win 1002, options [nop,nop,TS val 718803069 ecr 1773071294], length 228 04:54:50.701250 IP 10.0.1.10.42550 > ubuntu-dev-vm-1.cs2cloud.internal.ssh: Flags [.], ack 7372456, win 7689, options [nop,nop,TS val 1773071295 ecr 718803069], length 0 04:54:50.701346 IP ubuntu-dev-vm-1.cs2cloud.internal.ssh > 10.0.1.10.42550: Flags [P.], seq 7372684:7373280, ack 4249, win 1002, options [nop,nop,TS val 718803070 ecr 1773071295], length 596 04:54:50.701570 IP ubuntu-dev-vm-1.cs2cloud.internal.ssh > 10.0.1.10.42550: Flags [P.], seq 7373280:7373508, ack 4249, win 1002, options [nop,nop,TS val 718803070 ecr 1773071295], length 228 04:54:50.701822 IP ubuntu-dev-vm-1.cs2cloud.internal.ssh > 10.0.1.10.42550: Flags [P.], seq 7373508:7373712, ack 4249, win 1002, options [nop,nop,TS val 718803070 ecr 1773071295], length 204 04:54:50.701915 IP 10.0.1.10.42550 > ubuntu-dev-vm-1.cs2cloud.internal.ssh: Flags [.], ack 7373280, win 7689, options [nop,nop,TS val 1773071296 ecr 718803069], length 0 04:54:50.702097 IP ubuntu-dev-vm-1.cs2cloud.internal.ssh > 10.0.1.10.42550: Flags [P.], seq 7373712:7373940, ack 4249, win 1002, options [nop,nop,TS val 718803070 ecr 1773071296], length 228 04:54:50.702268 IP 10.0.1.10.42550 > ubuntu-dev-vm-1.cs2cloud.internal.ssh: Flags [.], ack 7373712, win 7689, options [nop,nop,TS val 1773071296 ecr 718803070], length 0 04:54:50.702323 IP ubuntu-dev-vm-1.cs2cloud.internal.ssh > 10.0.1.10.42550: Flags [P.], seq 7373940:7374152, ack 4249, win 1002, options [nop,nop,TS val 718803071 ecr 1773071296], length 212 04:54:50.702835 IP 10.0.1.10.42550 > ubuntu-dev-vm-1.cs2cloud.internal.ssh: Flags [.], ack 7374152, win 7689, options [nop,nop,TS val 1773071296 ecr 718803070], length 0 I am able to ping the VR from the VM which is on same host. But if I ping from VM to VR which is not on same host then it is not working. GitHub link: https://github.com/apache/cloudstack/discussions/9154#discussioncomment-9614814 ---- This is an automatically sent email for users@cloudstack.apache.org. To unsubscribe, please send an email to: users-unsubscr...@cloudstack.apache.org
