Destination Host Unreachable suddenly comes with no logical reason !!

General Help
1

hi guys
i have a very confusing problem that caught and get me crazy. please and please anyone help me

i have a Asterisk base PBX VM and a SIP Trunk Line that connect to a modem.
my modem IP is “10.192.6.25/30” and i connect that directly to an ESXi server and attached that to a VM(my PBX)
my PBX IP is “10.192.6.26/30”
when i setup entire system i had no problem and system goes very well but after 1 or 2 day my SIP TRUNK calls suddenly lost and every body’s call has been terminate!!
i have other connection via a sangoma Vega50 External Gateway(for my analog telephone lines) and it’s work very well … i mean i’m pretty sure my PBX does not have a problem but when i ping my SIP TRUNK’s modem in a period time like 24 hours , i see errors like this :

64 bytes from 10.192.6.25: icmp_seq=11037 ttl=255 time=4.43 ms
64 bytes from 10.192.6.25: icmp_seq=11038 ttl=255 time=4.65 ms
64 bytes from 10.192.6.25: icmp_seq=11039 ttl=255 time=4.36 ms
64 bytes from 10.192.6.25: icmp_seq=11040 ttl=255 time=4.38 ms
64 bytes from 10.192.6.25: icmp_seq=11041 ttl=255 time=5.92 ms
64 bytes from 10.192.6.25: icmp_seq=11042 ttl=255 time=4.54 ms
64 bytes from 10.192.6.25: icmp_seq=11043 ttl=255 time=4.42 ms
64 bytes from 10.192.6.25: icmp_seq=11044 ttl=255 time=4.41 ms
From 10.192.6.26 icmp_seq=11065 Destination Host Unreachable
From 10.192.6.26 icmp_seq=11066 Destination Host Unreachable
From 10.192.6.26 icmp_seq=11067 Destination Host Unreachable
From 10.192.6.26 icmp_seq=11068 Destination Host Unreachable
From 10.192.6.26 icmp_seq=11069 Destination Host Unreachable
From 10.192.6.26 icmp_seq=11070 Destination Host Unreachable
From 10.192.6.26 icmp_seq=11071 Destination Host Unreachable
From 10.192.6.26 icmp_seq=11072 Destination Host Unreachable
From 10.192.6.26 icmp_seq=11073 Destination Host Unreachable
From 10.192.6.26 icmp_seq=11074 Destination Host Unreachable
From 10.192.6.26 icmp_seq=11075 Destination Host Unreachable

the connection between PBX and SIP modem has been lost for couple of seconds but that’s enough for terminating calls and bad call experience for users.

i don’t know why but let’s you know what i do for this problem until now:

  1. i change my cable connection (twice)
  2. i change my Sip TRUNK modem
  3. i change my physical LAN port
  4. i change my Entire Server ( install new PBX on another ESXi server)
    note: i test ESXi 6.5 and 6.7 both have same problem !

i don’t know what is my problem
i guess it’s must be my ESXi settings but i don’t face this problem on my 10 years of my work

please and please some one help me

2

Firstly, I hope you have a Static IP on the PBX.
This seems to me like an issue with the VSwitch on your host machine.

3

hi & thanks for responding
yes i set STATIC IP address on both side (PBX & SIP Trunk Modem)

i think so but i don’t know what’s problem with VSwitch
i use E1000 LAN adapter and some one in one other forum told me i must passthrough the physical LAN interface of ESXi and attach directly to PBX VM

anyone has an idea?

4

Is there anything in your logs? Are you running multiple virtual adapters on your VM? What about pings TO the PBX? Do they drop as well?

5

thanks gbaughma for responding

what logs should i check for this problem?
i have 2 interface on my VM one point to my local network and other one point DIRECTLY(on the VSwitch) to the SIP Trunk modem with /30 Prefix

like i told in main question this problem appears suddenly with no time schedule!!
i think that must be something in my Virtual Switch or my VM Network Card setting but i don’t know what is it.

6

dmesg | grep eth

7

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