<![CDATA[I wish that one day, just one day, this would work right. Specified backup network NIC]]>I've used xcp-ng for 3-4 years now, and never once gotten backups to go over the proper nic. We have 1gb nics, 10gb nics, and 56gb nics. I set the migration network for 56gb nics, and backup for 10gb nics. Never once has backups ever worked over anything other than the 1gb nics.

For reference eth7 is the management network interface.

Anyone happen to know why this is and am I the only one experiencing this?

Thank you.

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]]>https://xcp-ng.org/forum/topic/11335/i-wish-that-one-day-just-one-day-this-would-work-right.-specified-backup-network-nicRSS for NodeMon, 12 Oct 2026 18:17:39 GMTThu, 25 Sep 2025 13:06:56 GMT60<![CDATA[Reply to I wish that one day, just one day, this would work right. Specified backup network NIC on Mon, 29 Sep 2025 06:51:20 GMT]]>different platform have different internal , and so different edge case. We are here to help to bridge the gap.

]]>https://xcp-ng.org/forum/post/97853https://xcp-ng.org/forum/post/97853Mon, 29 Sep 2025 06:51:20 GMT<![CDATA[Reply to I wish that one day, just one day, this would work right. Specified backup network NIC on Sun, 28 Sep 2025 03:39:25 GMT]]>@elementalwindx what works for you is the best !
we are setting up a full.Vates.stack MSP hosting solution.
xcpng has its current flaws, but they are addressed each month by the dev team 🔥

]]>https://xcp-ng.org/forum/post/97829https://xcp-ng.org/forum/post/97829Sun, 28 Sep 2025 03:39:25 GMT<![CDATA[Reply to I wish that one day, just one day, this would work right. Specified backup network NIC on Sat, 27 Sep 2025 23:31:50 GMT]]>@Pilow yeah I think after 4 years of dealing with it, I finally give up. Been moving everything to proxmox for the past couple days.

]]>https://xcp-ng.org/forum/post/97826https://xcp-ng.org/forum/post/97826Sat, 27 Sep 2025 23:31:50 GMT<![CDATA[Reply to I wish that one day, just one day, this would work right. Specified backup network NIC on Sat, 27 Sep 2025 07:47:14 GMT]]>@elementalwindx it seems complicated, coming from other virtualization stacks that has billions of R&D budget with solutions where you click next next next, done.

but in the end, when you understand the mechanisms, and get it working, you really fully understand whats going on.

many facepalms in the process though
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]]>https://xcp-ng.org/forum/post/97815https://xcp-ng.org/forum/post/97815Sat, 27 Sep 2025 07:47:14 GMT<![CDATA[Reply to I wish that one day, just one day, this would work right. Specified backup network NIC on Fri, 26 Sep 2025 22:17:42 GMT]]>@Pilow HOLY COW. Could they make it any more unnecessarily more complicated? shesh.

]]>https://xcp-ng.org/forum/post/97813https://xcp-ng.org/forum/post/97813Fri, 26 Sep 2025 22:17:42 GMT<![CDATA[Reply to I wish that one day, just one day, this would work right. Specified backup network NIC on Thu, 25 Sep 2025 19:28:06 GMT]]>@Pilow you found one of the not so bright part of the api

the data path is the same for backups and RRD, so RRD failing are often a canary of a misconfigured backup network. So if you change backup network and the task are falling, this probably means something wen wront with your network.

]]>https://xcp-ng.org/forum/post/97745https://xcp-ng.org/forum/post/97745Thu, 25 Sep 2025 19:28:06 GMT<![CDATA[Reply to I wish that one day, just one day, this would work right. Specified backup network NIC on Thu, 25 Sep 2025 19:04:08 GMT]]>we ran into this issue too.

By default (coming from vmware) we used management network on 1Gb NICs.

we have 2x10Gb and 2x25Gb nics also in the hosts, and struggled to get backup on THESE nics...

we had to :

  • assign a nic and IP to XOA int our preferred backup network (we created a dedicated VLAN on 2x10Gb bond)
  • be sure that each host has an IP address in this network too
  • we added XO Proxies... guess what ? they also need an IP address in this network (on the FIRST nic if you have more than one per proxy... the first IP address reported by XAPI on the proxy or xoa default tab must be the backup network one... haha.)

and then, put the correct preferred backup network on the pool, and it takes the good nics to transfer backups. hooray.

ps : beware, when all is working as intented... check your STATS tab... we had half our pools/hosts not reporting anything else than NO STATS, and the regular RRD scan task was failing after changing this BACKUP NETWORK preference !
Why only half ? all host/pools that were in ANOTHER subnet of the XOA vm weren't reporting stats anymore.
we had to add static routing to get the stats tabs work again, the XOA needed to still contact hosts that were on another subnet.

whats the correlation between RRD scans to make stats and prefered backup network ? don't ask me 🙂 .

]]>https://xcp-ng.org/forum/post/97739https://xcp-ng.org/forum/post/97739Thu, 25 Sep 2025 19:04:08 GMT<![CDATA[Reply to I wish that one day, just one day, this would work right. Specified backup network NIC on Thu, 25 Sep 2025 14:53:50 GMT]]>@elementalwindx yes XOA need to have access to the backup network . the default migration network is used directly by xcp-ng no need to assign to xo

]]>https://xcp-ng.org/forum/post/97718https://xcp-ng.org/forum/post/97718Thu, 25 Sep 2025 14:53:50 GMT<![CDATA[Reply to I wish that one day, just one day, this would work right. Specified backup network NIC on Thu, 25 Sep 2025 14:46:19 GMT]]>@elementalwindx I think I know : the backup network is used for the host storage to xo path , not for the xo to replica (also host)
that is why you only have RX , and not RX + TX

edit ; after checking the code, it should also be used when writing to an host

]]>https://xcp-ng.org/forum/post/97717https://xcp-ng.org/forum/post/97717Thu, 25 Sep 2025 14:46:19 GMT<![CDATA[Reply to I wish that one day, just one day, this would work right. Specified backup network NIC on Thu, 25 Sep 2025 14:10:17 GMT]]>@florent

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No proxies involved.
Doing a replication. Do I need to add eth4 and 6 to the XO vm?

]]>https://xcp-ng.org/forum/post/97713https://xcp-ng.org/forum/post/97713Thu, 25 Sep 2025 14:10:17 GMT<![CDATA[Reply to I wish that one day, just one day, this would work right. Specified backup network NIC on Thu, 25 Sep 2025 13:30:28 GMT]]>@elementalwindx what network can the xoa access? can you show a screenshot of the network tab of xo ?
are you using a proxy ?

are you doing backups or replication ?

]]>https://xcp-ng.org/forum/post/97712https://xcp-ng.org/forum/post/97712Thu, 25 Sep 2025 13:30:28 GMT