I have Ubuntu 14.04 virtual machine with static ip and bridged network. Internet connection on host is wireless and most of the time works well, but sometimes it is a little bit slower too, but not much. Guest connection is significantly slower and some pings are low, some are average, some are very high. With NAT host and guest work well. I have set dns server to 8.8.8.8. As you can see almost half of pings are very high, over 1000ms. And it looks totally random, one ping is low, next is high, next low, next high, etc.
Average ping from router to host with guest machine turned off is about few miliseconds. When I turn on virtual machine almost all pings from router to host are above 100ms. Average ping from router to guest is about 600-1200ms.
Here's ping from guest to 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
64 bytes from 8.8.8.8: icmp_seq=1 ttl=54 time=1098 ms
64 bytes from 8.8.8.8: icmp_seq=2 ttl=54 time=88.2 ms
64 bytes from 8.8.8.8: icmp_seq=3 ttl=54 time=1235 ms
64 bytes from 8.8.8.8: icmp_seq=4 ttl=54 time=235 ms
64 bytes from 8.8.8.8: icmp_seq=5 ttl=54 time=2305 ms
64 bytes from 8.8.8.8: icmp_seq=6 ttl=54 time=1297 ms
64 bytes from 8.8.8.8: icmp_seq=7 ttl=54 time=289 ms
64 bytes from 8.8.8.8: icmp_seq=8 ttl=54 time=41.0 ms
64 bytes from 8.8.8.8: icmp_seq=9 ttl=54 time=1357 ms
64 bytes from 8.8.8.8: icmp_seq=10 ttl=54 time=358 ms
64 bytes from 8.8.8.8: icmp_seq=11 ttl=54 time=2129 ms
64 bytes from 8.8.8.8: icmp_seq=12 ttl=54 time=1130 ms
64 bytes from 8.8.8.8: icmp_seq=13 ttl=54 time=130 ms
64 bytes from 8.8.8.8: icmp_seq=14 ttl=54 time=37.1 ms
64 bytes from 8.8.8.8: icmp_seq=15 ttl=54 time=2110 ms
64 bytes from 8.8.8.8: icmp_seq=16 ttl=54 time=1101 ms
64 bytes from 8.8.8.8: icmp_seq=17 ttl=54 time=94.3 ms
64 bytes from 8.8.8.8: icmp_seq=18 ttl=54 time=35.6 ms
64 bytes from 8.8.8.8: icmp_seq=19 ttl=54 time=29.3 ms
64 bytes from 8.8.8.8: icmp_seq=20 ttl=54 time=1082 ms
64 bytes from 8.8.8.8: icmp_seq=21 ttl=54 time=75.4 ms
64 bytes from 8.8.8.8: icmp_seq=22 ttl=54 time=2173 ms
guest /etc/network/interfaces:
auto eth0
iface eth0 inet static
address 192.168.1.223
netmask 255.255.255.0
gateway 192.168.1.254
traceroute from guest to 8.8.8.8
traceroute to 8.8.8.8 (8.8.8.8), 30 hops max, 60 byte packets
1 192.168.1.254 (192.168.1.254) 1034.355 ms 1034.144 ms 1034.345 ms
2 10.16.0.0 (10.16.0.0) 1034.388 ms 1034.509 ms 1034.575 ms
3 185.28.16.1 (185.28.16.1) 1034.793 ms 1035.728 ms 1035.701 ms
4 ip-91.189.249.37.s.net.pl (91.189.249.37) 1038.276 ms 1038.061 ms 1037.881 ms
5 te2-7.251.ccr01.krk01.atlas.cogentco.com (149.6.74.109) 1034.582 ms 1034.839 ms 1035.011 ms
6 te2-7.ccr01.brq01.atlas.cogentco.com (154.54.38.1) 1035.293 ms 75.936 ms 75.723 ms
7 te0-4-0-7.ccr21.bts01.atlas.cogentco.com (154.54.59.149) 18.671 ms 18.613 ms te0-1-0-6.ccr21.bts01.atlas.cogentco.com (154.54.36.109) 20.575 ms
8 be2222.ccr21.vie01.atlas.cogentco.com (130.117.1.50) 21.350 ms be2221.ccr21.vie01.atlas.cogentco.com (130.117.48.142) 22.401 ms 22.402 ms
9 be2200.ccr21.muc01.atlas.cogentco.com (130.117.49.1) 31.606 ms 31.563 ms 31.460 ms
10 be2228.ccr41.fra03.atlas.cogentco.com (154.54.38.49) 33.276 ms 33.278 ms be2229.ccr42.fra03.atlas.cogentco.com (154.54.38.57) 33.165 ms
11 be2184.agr21.fra03.atlas.cogentco.com (130.117.48.69) 36.464 ms be2188.agr21.fra03.atlas.cogentco.com (130.117.48.113) 34.667 ms 34.651 ms
12 149.6.42.46 (149.6.42.46) 32.953 ms 28.052 ms 27.741 ms
13 216.239.46.121 (216.239.46.121) 28.700 ms 28.506 ms 28.467 ms
14 216.239.49.245 (216.239.49.245) 30.012 ms 209.85.246.189 (209.85.246.189) 32.770 ms 209.85.241.39 (209.85.241.39) 32.751 ms
15 google-public-dns-a.google.com (8.8.8.8) 30.771 ms 32.537 ms 30.076 ms
