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Hi all. I’ve got a Veeam backup & replication CE that backup some VM on VMware ESXi.

This backups are copied offsite to another site using a IPSEC VPN, a proxy is placed on other site and storage is a NAS.

At least once a week, randomly, backup copy job fail because can’t connect to Veeam proxy.

At this this I’m using Linux as a proxy but also with Windows we’ve issue.

 

What found in logs are this rows:

 

>26.08.2024 08:31:56.875]    <24>   Error (3)     ReconnectableSocket]cPacketAsyncReceiver] Exception on vaf09e7b0-f7ed-4e85-969f-96d3cff82943].
d26.08.2024 08:31:56.875]    <24>   Error (3)    A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond (System.Net.Sockets.SocketException)
e26.08.2024 08:31:56.875]    <24>   Error (3)       at Veeam.Backup.Common.Reconnect.CPacketAsyncReceiver.PushData(CSocketAsyncEventArgsEx e)
D26.08.2024 08:31:56.875]    <24>    Info (3)        7ReconnectableSocket] Retryable error on Âaf09e7b0-f7ed-4e85-969f-96d3cff82943].
r26.08.2024 08:31:56.875]    <24>    Info (3)        2ReconnectableSocket] Reconnecting Âaf09e7b0-f7ed-4e85-969f-96d3cff82943] (retryable error)...
f26.08.2024 08:31:56.875]    <24>    Info (3)        rNetSocket] Connecting to '192.168.0.80:6162'.
26.08.2024 08:31:56.890]    <24>    Info (3)    1ReconnectableSessionStarter] Reconnected to backup client on 'SRV-VPROXY.mydomain.local' at c192.168.0.80: 6162]. Connection id: af09e7b0-f7ed-4e85-969f-96d3cff82943.
'26.08.2024 08:31:56.906]    <24>    Info (3)        5ReconnectableSocket] Traffic history confirmation: remote l17], local  7].

 

I’ve setup a detailed monitoring on network and also using agent on proxy and backup server that verify every 30 sec. the connections but no issues where found.

 

This is the error:

Unable to access target repository Error: Selected server SRV-VPROXY.mydomain.local is unavailable.
Unable to access target repository, processing will be retried (retry 1 out of 6)

 

What is strange is that: when I connect to Veeam console to check the issue somethings happen or is triggered because copy job start working.

 

Any suggestion?

@epasqualotto -

I don’t have any specific suggestions, but your error does look like it’s network-related. Though you say you do have monitoring configured every 30secs, in network terms, that is a long time. I’d be curious to see what a ping -t <ip-of-proxy> (perpetual/continual ping) to the Proxy IP shows. How many packets are dropping due to some kind of connectivity issue.

Based on the error messages you posted from the logs it seems there are network issues when this happens and Veeam cannot reach the proxy on the DR site.  I cannot explain it working when you go in to the Veeam Console as that seems strange.

I know you are using the CE edition but a Support ticket would be the ideal solution here unless your logging shows something related to the network and IPSec VPN.

you’re right also for me seems a network-related issue but my tons of check in Zabbix and other service that use that VPN said the opposite.

I’m thinking about somethings related to MTU

you’re right also for me seems a network-related issue but my tons of check in Zabbix and other service that use that VPN said the opposite.

I’m thinking about somethings related to MTU

Yes could be MTU but it is network related somehow even if Zabbix says otherwise.

Did you try the ping I suggesed to see if packets are dropping?

Did you try the ping I suggesed to see if packets are dropping?

Now I switched the connectivity for the VPN to a different ISP and I’ll monitor the issue.

Zabbix service pinged it 3 times every 30s and found nothing strange, only the latency goes up to 20/25ms during backup.

After this test I’ll setup a ping -t with the standard connectivity

 

Thanks

Ok... Keep us posted. 

Did you try the ping I suggesed to see if packets are dropping?

Now I switched the connectivity for the VPN to a different ISP and I’ll monitor the issue.

Zabbix service pinged it 3 times every 30s and found nothing strange, only the latency goes up to 20/25ms during backup.

After this test I’ll setup a ping -t with the standard connectivity

 

Thanks

Changing ISP hopefully that works.  Keep us posted on the issue.

You can use iPerf to do some speed/connectivity testing outside of Veeam.

I suggest to check connectivity from DR site to primary… on linux proxy you can use nc command… you can insert in a shell and run it every 5 secs and logging all in a text file…. 

 

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