Hello Jithin. Thanks for your reply. It looks like the ICMP packets are going out on ens192, but no reply packets are being received.
>From SSVM: root@s-4-VM:~# ping 172.18.5.71 PING 172.18.5.71 (172.18.5.71): 56 data bytes ^C--- 172.18.5.71 ping statistics --- 58 packets transmitted, 0 packets received, 100% packet loss >From the KVM host: $ sudo tcpdump -n -i ens192 host 172.18.5.71 [...] 11:28:42.916173 IP 10.120.123.165 > 172.18.5.71: ICMP echo request, id 5075, seq 0, length 64 11:28:43.916776 IP 10.120.123.165 > 172.18.5.71: ICMP echo request, id 5075, seq 1, length 64 11:28:44.918183 IP 10.120.123.165 > 172.18.5.71: ICMP echo request, id 5075, seq 2, length 64 11:28:45.919634 IP 10.120.123.165 > 172.18.5.71: ICMP echo request, id 5075, seq 3, length 64 11:28:46.920169 IP 10.120.123.165 > 172.18.5.71: ICMP echo request, id 5075, seq 4, length 64 11:28:47.921504 IP 10.120.123.165 > 172.18.5.71: ICMP echo request, id 5075, seq 5, length 64 11:28:48.922815 IP 10.120.123.165 > 172.18.5.71: ICMP echo request, id 5075, seq 6, length 64 11:28:49.924236 IP 10.120.123.165 > 172.18.5.71: ICMP echo request, id 5075, seq 7, length 64 11:28:50.498165 IP 10.120.123.168.35577 > 172.18.5.71.domain: 3674+ A? 2.debian.pool.ntp.org. (39) 11:28:50.498216 IP 10.120.123.168.35577 > 172.18.5.71.domain: 29270+ AAAA? 2.debian.pool.ntp.org. (39) 11:28:50.711798 IP 10.120.123.165.34982 > 172.18.5.71.domain: 7726+ A? 0.debian.pool.ntp.org. (39) 11:28:50.711854 IP 10.120.123.165.34982 > 172.18.5.71.domain: 23094+ AAAA? 0.debian.pool.ntp.org. (39) 11:28:50.925420 IP 10.120.123.165 > 172.18.5.71: ICMP echo request, id 5075, seq 8, length 64 11:28:51.926124 IP 10.120.123.165 > 172.18.5.71: ICMP echo request, id 5075, seq 9, length 64 11:28:52.927534 IP 10.120.123.165 > 172.18.5.71: ICMP echo request, id 5075, seq 10, length 64 11:28:53.928105 IP 10.120.123.165 > 172.18.5.71: ICMP echo request, id 5075, seq 11, length 64 11:28:54.928863 IP 10.120.123.165 > 172.18.5.71: ICMP echo request, id 5075, seq 12, length 64 11:28:55.499338 IP 10.120.123.168.37214 > 172.18.5.71.domain: 3674+ A? 2.debian.pool.ntp.org. (39) 11:28:55.499384 IP 10.120.123.168.37214 > 172.18.5.71.domain: 29270+ AAAA? 2.debian.pool.ntp.org. (39) 11:28:55.716832 IP 10.120.123.165.54610 > 172.18.5.71.domain: 7726+ A? 0.debian.pool.ntp.org. (39) 11:28:55.716905 IP 10.120.123.165.54610 > 172.18.5.71.domain: 23094+ AAAA? 0.debian.pool.ntp.org. (39) 11:28:55.930251 IP 10.120.123.165 > 172.18.5.71: ICMP echo request, id 5075, seq 13, length 64 11:28:56.931758 IP 10.120.123.165 > 172.18.5.71: ICMP echo request, id 5075, seq 14, length 64 11:28:57.933067 IP 10.120.123.165 > 172.18.5.71: ICMP echo request, id 5075, seq 15, length 64 11:28:58.934397 IP 10.120.123.165 > 172.18.5.71: ICMP echo request, id 5075, seq 16, length 64 11:28:59.935756 IP 10.120.123.165 > 172.18.5.71: ICMP echo request, id 5075, seq 17, length 64 11:29:00.936025 IP 10.120.123.165 > 172.18.5.71: ICMP echo request, id 5075, seq 18, length 64 11:29:01.937567 IP 10.120.123.165 > 172.18.5.71: ICMP echo request, id 5075, seq 19, length 64 11:29:02.938360 IP 10.120.123.165 > 172.18.5.71: ICMP echo request, id 5075, seq 20, length 64 11:29:03.939774 IP 10.120.123.165 > 172.18.5.71: ICMP echo request, id 5075, seq 21, length 64 11:29:04.502416 IP 10.120.123.168.35577 > 172.18.5.71.domain: 3674+ A? 2.debian.pool.ntp.org. (39) 11:29:04.502502 IP 10.120.123.168.35577 > 172.18.5.71.domain: 29270+ AAAA? 2.debian.pool.ntp.org. (39) 11:29:04.725594 IP 10.120.123.165.34982 > 172.18.5.71.domain: 7726+ A? 0.debian.pool.ntp.org. (39) 11:29:04.725649 IP 10.120.123.165.34982 > 172.18.5.71.domain: 23094+ AAAA? 0.debian.pool.ntp.org. (39) 11:29:04.941034 IP 10.120.123.165 > 172.18.5.71: ICMP echo request, id 5075, seq 22, length 64 11:29:05.943107 IP 10.120.123.165 > 172.18.5.71: ICMP echo request, id 5075, seq 23, length 64 [...] The DNS server can be pinged from the KVM host: $ ping 172.18.5.71 PING 172.18.5.71 (172.18.5.71) 56(84) bytes of data. 64 bytes from 172.18.5.71: icmp_seq=1 ttl=126 time=0.448 ms 64 bytes from 172.18.5.71: icmp_seq=2 ttl=126 time=1.09 ms 64 bytes from 172.18.5.71: icmp_seq=3 ttl=126 time=0.265 ms 64 bytes from 172.18.5.71: icmp_seq=4 ttl=126 time=0.401 ms ^C --- 172.18.5.71 ping statistics --- 4 packets transmitted, 4 received, 0% packet loss, time 3065ms rtt min/avg/max/mdev = 0.265/0.550/1.089/0.319 ms Disclaimer The information contained in this communication from the sender is confidential. It is intended solely for use by the recipient and others authorized to receive it. If you are not the recipient, you are hereby notified that any disclosure, copying, distribution or taking action in relation of the contents of this information is strictly prohibited and may be unlawful. This email has been scanned for viruses and malware, and may have been automatically archived by Mimecast Ltd, an innovator in Software as a Service (SaaS) for business. Providing a safer and more useful place for your human generated data. Specializing in; Security, archiving and compliance. To find out more visit the Mimecast website.
