[PVE-User] VM inaccessible, Virtual LAN CARD issue

[Muhammad Yousuf Khan]

i have been running a private cloud for about a year, although i am using
PVE for 4 years but this is first time i am using it for remote cloud.
every thing is working great and nothing happen for about a year. however i
observe one issue. which is Virtual Machine lan card related,
this is not happening very frequently . but happen once in a 3 month and
not on all machines but few machines.

the problem is, VM stop reaching the LAN and WAN.

when i ping , it says "destination host unreachable"

i disable/enable the LAN card it didnt help.

i restart the machine it also does not help.

i finally found the work around, i add another lan card and
suntdown/restart the machine the new lan card start working and after a
while the problem one is also start working.

would any one please tell me what is happenning and how can i fix it.

Thanks
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