Simple Lan topology with packet loss

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maxpaynebupt
Posts: 2
Joined: Thu Aug 12, 2021 1:51 pm

Simple Lan topology with packet loss

Post by maxpaynebupt » Thu Aug 12, 2021 2:08 pm

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The topology is quite simple, I set up a VPN server on a ubuntu server, and patched the virtualhub to the linux bridge on the server node, and at the same time, added VM's interface to the linux bridge.

But, after I connected from remote node to the vpn server, ( VPN connection from OtherNode possess the IP 172.20.0.27)and try to ping from 172.20.0.27 to 172.20.0.45, there are nearly 80% packet loss, what's wrong? I think it should be pingable or not pingable, but can't figure out why there should be packet loss.

Both server and client are (Ver 4.34, Build 9745, rtm). I tried to disable UDP acceleration, tried different server version, no use.

Code: Select all

PING 172.20.0.45 (172.20.0.45) 56(84) bytes of data.
64 bytes from 172.20.0.45: icmp_seq=11 ttl=64 time=2.06 ms
64 bytes from 172.20.0.45: icmp_seq=12 ttl=64 time=1.78 ms
64 bytes from 172.20.0.45: icmp_seq=20 ttl=64 time=1.73 ms
64 bytes from 172.20.0.45: icmp_seq=24 ttl=64 time=2.63 ms
64 bytes from 172.20.0.45: icmp_seq=40 ttl=64 time=7.38 ms
64 bytes from 172.20.0.45: icmp_seq=42 ttl=64 time=2.78 ms
64 bytes from 172.20.0.45: icmp_seq=55 ttl=64 time=2.61 ms
64 bytes from 172.20.0.45: icmp_seq=64 ttl=64 time=7.54 ms
From 172.20.0.27 icmp_seq=76 Destination Host Unreachable
From 172.20.0.27 icmp_seq=77 Destination Host Unreachable
From 172.20.0.27 icmp_seq=78 Destination Host Unreachable
From 172.20.0.27 icmp_seq=79 Destination Host Unreachable
From 172.20.0.27 icmp_seq=80 Destination Host Unreachable
From 172.20.0.27 icmp_seq=81 Destination Host Unreachable
From 172.20.0.27 icmp_seq=82 Destination Host Unreachable
From 172.20.0.27 icmp_seq=83 Destination Host Unreachable
64 bytes from 172.20.0.45: icmp_seq=84 ttl=64 time=2.51 ms
64 bytes from 172.20.0.45: icmp_seq=87 ttl=64 time=2.95 ms
64 bytes from 172.20.0.45: icmp_seq=93 ttl=64 time=1.76 ms
64 bytes from 172.20.0.45: icmp_seq=103 ttl=64 time=5.98 ms
64 bytes from 172.20.0.45: icmp_seq=104 ttl=64 time=4.89 ms
64 bytes from 172.20.0.45: icmp_seq=120 ttl=64 time=3.97 ms
64 bytes from 172.20.0.45: icmp_seq=122 ttl=64 time=4.39 ms
64 bytes from 172.20.0.45: icmp_seq=126 ttl=64 time=9.02 ms
64 bytes from 172.20.0.45: icmp_seq=127 ttl=64 time=2.83 ms
64 bytes from 172.20.0.45: icmp_seq=139 ttl=64 time=2048 ms
64 bytes from 172.20.0.45: icmp_seq=140 ttl=64 time=1028 ms
64 bytes from 172.20.0.45: icmp_seq=141 ttl=64 time=3.99 ms
64 bytes from 172.20.0.45: icmp_seq=145 ttl=64 time=8.37 ms
64 bytes from 172.20.0.45: icmp_seq=146 ttl=64 time=2.99 ms
64 bytes from 172.20.0.45: icmp_seq=154 ttl=64 time=3.52 ms
64 bytes from 172.20.0.45: icmp_seq=170 ttl=64 time=1027 ms
64 bytes from 172.20.0.45: icmp_seq=171 ttl=64 time=3.44 ms
64 bytes from 172.20.0.45: icmp_seq=186 ttl=64 time=1.93 ms
64 bytes from 172.20.0.45: icmp_seq=194 ttl=64 time=4.28 ms
64 bytes from 172.20.0.45: icmp_seq=201 ttl=64 time=3.59 ms
64 bytes from 172.20.0.45: icmp_seq=204 ttl=64 time=7.21 ms
From 172.20.0.27 icmp_seq=228 Destination Host Unreachable
From 172.20.0.27 icmp_seq=232 Destination Host Unreachable
From 172.20.0.27 icmp_seq=233 Destination Host Unreachable
From 172.20.0.27 icmp_seq=234 Destination Host Unreachable
From 172.20.0.27 icmp_seq=235 Destination Host Unreachable
From 172.20.0.27 icmp_seq=236 Destination Host Unreachable
From 172.20.0.27 icmp_seq=237 Destination Host Unreachable
64 bytes from 172.20.0.45: icmp_seq=241 ttl=64 time=7.38 ms
64 bytes from 172.20.0.45: icmp_seq=244 ttl=64 time=1.52 ms
64 bytes from 172.20.0.45: icmp_seq=249 ttl=64 time=2056 ms
64 bytes from 172.20.0.45: icmp_seq=250 ttl=64 time=1032 ms
64 bytes from 172.20.0.45: icmp_seq=251 ttl=64 time=3.94 ms
64 bytes from 172.20.0.45: icmp_seq=258 ttl=64 time=4.17 ms
64 bytes from 172.20.0.45: icmp_seq=260 ttl=64 time=2.51 ms
64 bytes from 172.20.0.45: icmp_seq=299 ttl=64 time=12.0 ms
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Last edited by maxpaynebupt on Fri Aug 13, 2021 1:20 am, edited 1 time in total.

eddiewu
Posts: 135
Joined: Wed Nov 25, 2020 9:10 am

Re: Simple Lan topology with packet loss

Post by eddiewu » Thu Aug 12, 2021 4:08 pm

https://www.softether.org/4-docs/1-manu ... r_Mac_OS_X

You can't ping from virtual hub to a bridged local NIC.

maxpaynebupt
Posts: 2
Joined: Thu Aug 12, 2021 1:51 pm

Re: Simple Lan topology with packet loss

Post by maxpaynebupt » Fri Aug 13, 2021 1:19 am

Sorry for ambiguous description, the green line means a VPN connection from the 'OtherNode', which possess the IP 172.20.0.27.



eddiewu wrote:
Thu Aug 12, 2021 4:08 pm
https://www.softether.org/4-docs/1-manu ... r_Mac_OS_X

You can't ping from virtual hub to a bridged local NIC.

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