I was able to find a post which discussed the known NIC issue in Linux imported VMs (by Brandon Lee):
https://www.virtualizationhowto.com/2024/02/migrate-from-vmware-to-xcp-ng-a-vsphere-admins-perspective/

It kinda makes sense I guess why this happens -> the NIC is given a static name in Netplan initially when the VM is created. When the VM is migrated/imported into XO, this Netplan NIC name is NOT changed in the Netplan .yml file, thus the OS can't get an IP. To rectify this, change the name XO gives the NIC in the Linux OS (eth0 for Ubnt2204 or enX0 for Ubnt2404) in the .yml file, reboot the VM, then you'll be able to get an IP if you use DHCP. You can then also install Guest Tools by using a pkg mgr (apt for Ubnt).

The only remaining problem I'm having now is the CD eject issue. And again..this is on both imported Linux and Windows VMs.

I did some researching on possible resolutions -> running the xe vm-cd-eject cmd on the XCP Host doesn't work..I get the same error as in XO. I also verified the VMs I migrated from VMW did NOT have an ISO attached to them prior to migration. I should also say I got this same behavior even if I exported the VMW VMs to .ova then import them to XO.

I used the XO "Import From VMware" tool. I performed this on 3 VMs with no issues encountered during import. But, post-import, there are some as noted in the following:

1. On 2 Ubuntu VMs, v22.04 and v24.04, I am unable to boot the VM after import because XO assigns the VMs the "secure boot" option. The VMs are not configured for Secure Boot in VMware. I disable this option in VM > Adv tab, reboot and it then boots ok, but this is an issue which should be addressed. Maybe it's only for UEFI-based VMs?
2. When attempting to install Guest Tools via ISO. I can attach the ISO to the VM, but when I run the "sudo mount /dev/cdrom" cmd, it states "special device /dev/cdrom does not exist".
3. I then try to eject the ISO and receive an error like "<some character string>/vbd.xvdd does not exist in xenopsd."
4. The NIC of these imported Linux VMs is down after import...not sure why. I place it "up", but even so...they do not receive an IP address. I imported a Windows 2022 server and it did get an IP address, but it also has the eject ISO error as well.

Any thoughts on how to resolve these issues. If I choose to migrate from VMware,, this would be a huge deterrent to doing so.
Thanks!

@lawrencesystems @olivierlambert
Thought I'd provide an update here...only fair

After getting everything running again, I was able to add 2 physical XCP Hosts to XO and get things going -> create a Pool; create some VMs; test Live Migration (not VDI-based yet); import from VMW (an issue there with Linux); but overall...able to dive into it a bit deeper and see how things in XCP/XO work vs VMW. So far, after getting through my initial issues...I think it's ok

I think my Host2 network issue may have stemmed from attempting to add it back into XO when I was no longer seeing it in the Settings > Servers area after adding it to a Pool. I wasn't aware it would disappear from that area when adding it to a Pool. I don't think the documentation states this (unless I overlooked it? if not, would be helpful I think). Anyway...thanks to all for chiming in!

@FMOTrust I had this issue as well on a Slave host in my test environment. I was able to do Network Reset from xsconsole, but then after the Host rebooted to finish the reset, the Host reverted back to not having/seeing the Mgmt network, and...like you, I couldn't see any NICs either.

Since this was for testing, and I had no VMs on it, I just reinstalled XCP. I think there's a way to reset XCP I saw in another Forums post by removing the Local SR? Olivier shared that in the post..but I don't remember what post it was.

Not sure if this is a test or prod Host/environment for you...but if you can, unless someone from the Vates team comments, I think all that can be done is reinstall.

@Danp Understood...and that's what I did (in XO). Thanks!

@Danp Ah ok, understood. Does XCP use netplan for Linux networking mgmt? I know how to rename pNics in that. Maybe I just do that and it'd be easier? I rename pNics for other Linux devices I use for Veeam backup components; so it would be no big deal to do here if possible before I even start adding the XCP Hosts to XO. But, I guess as long as "logically" within XO I see the pNic name what I want so I know what it is...all good.
Thanks.

@coolsport00 Ok...just found in XCP docs, it says you "should" rename NICs before joining Hosts to a Pool:
https://docs.xcp-ng.org/networking/#renaming-nics

Though, that's for XCP directly and says the eth's need to be down to make the change. I'm not entirely sure this is the same process when doing via XO? Is that really needed? I would think a simple Name/Descr change doesn't require a downed eth and changes can simply be done in a XO Pool?

@DustinB Yep...makes total sense, especially when you have multiple Hosts. Make 1 config or change and let Pools propagate to all Pool Hosts is my thought too. I'm just trying to pinpoint how my Slave Host got corrupted...if there was some issue configuring a Host directly vs it being in a Pool.
Thanks.

@DustinB Thanks Dustin. If my Slave loses network again...I'll run that cmd. Hopefully not though!

Question if I may - does it matter where I configure my Host networking? Meaning (not my Mgmt ntwk..that's upon install), but if I want to change Network names/desc's, do I do that after adding Hosts to a Pool, or just go ahead and do it on the Hosts before adding them to a Pool? When I had my issue mentioned earlier above..I literally hadn't done anything but added 1 Host to my other in a Pool and just began homogenizing Networks, as well as adding a couple other VLAN networks. That was it..then bam!...issues on my Slave.
Thanks.

@lawrencesystems Well...I liked your video...showed me features XO has similar to vCenter (UUID mgmt, Tagging, Maint Mode behavior, etc).

Nothing there really pertained to the netwk issue I experienced. My Slave host somehow completely lost its network & I couldn't recover it (tried to from the Console). Because XO could no longer 'see' this Host, I couldn't even Detach it from the Pool. Maybe if there was some way to 'reset' the Host (manual Pool removal), I then wouldn't have needed to completely reinstall XCP. But, this process isn't in the documentation, and I didn't really search for it online...thought it would just be quicker to reinstall and start from scratch again.

And again...I didn't do much to either Host. All I was doing was changing Network Names and adding Descriptions. Issue may have been I was doing directly on a Host and not at the Pool level, although I forgot where specifically I was attempting this. In your video you just shared, you mention making any & all Network changes on Hosts directly before adding to the Pool...is that correct? Don't make NIC changes within a Pool?
Thanks.

@lawrencesystems I'll give that vid a watch & see if it has any info for what I'm experiencing. Thanks!

When attempting to change MTU on one of my Host NICs (HBA) from 1500 > 9000, I received the below error (raw log):

"{
  "id": "0m936bdze",
  "properties": {
    "method": "network.set",
    "params": {
      "mtu": 9000,
      "id": "aadad118-1455-f063-7c35-7a4b709e4254"
    },
    "name": "API call: network.set",
    "userId": "dd12cef8-919e-4ab7-97ae-75253331c84f",
    "type": "api.call"
  },
  "start": 1743794658698,
  "status": "failure",
  "updatedAt": 1743794668793,
  "end": 1743794668793,
  "result": {
    "message": "Some network interfaces could not be updated.",
    "name": "Error",
    "stack": "Error: Some network interfaces could not be updated.\n    at Xapi.setMtu (file:///opt/xo/xo-builds/xen-orchestra-202504020942/@xen-orchestra/xapi/network.mjs:78:13)"
  }
}"

Although...when I look at the MTU in the Host (or Pool) Network tab, it shows it changed. Changing for another NIC/HBA I use for SAN iSCSI storage worked and showed a green check (success). But for this NIC, though showing as changed, I got this error. This particular NIC is used for Mgmt when I initially configured XCP. (v8.3 btw). Interestingly enough, another default Network using this same eth did allow me to change the MTU. So, it appears the issue is the Network, not the pNIC (PIF). Thoughts? Could it be changing MTU on the Mgmt Network isn't allowed after the Host is built?
Thanks.

@olivierlambert - if I do run into such an issue again with my Hosts in the Pool and it's "offline" or "halted" or whatever, I can't "detach" it from the Pool, I can't disable Maint Mode (I never put it in this Mode, nor did I disable it...even tho it showed in these states)... how can I get the Host back to normal without a complete XCP reinstall? For the Host that lost network, I tried to reconfigure/reset it from xsconsole, but after I went through that process..added the NIC info (IP, etc) and the Host rebooted, when it got back to the Console, there NIC settings again didn't show/were lost.

I think I saw on another post where you told someone to delete the Local Storage, then re-add? But in XO, all of the Storage showed as disconnected? With no NIC or settings, I guess the only way to do so was from iLO console?

@olivierlambert - understood..which is why I'm sticking with it to this point.

I wonder if some of my network issue was due to nic adapter Name & Description changing? After placing the Hosts in the Pool, I was renaming the NICs to something more relevant, like "mgmt" and "iscsi", as well as adding a Description. I would think that shouldn't be an issue, but was the only "extra" thing I did to the Hosts after adding them to the Pool. shrug

Thanks for the info/feedback.

@lawrencesystems Hi Tom...yessir...I'm just testing out XO. I do have XC and just "looked" at it, but am not doing any configurations, etc in it. It was more to see what it looked like. Again, all my testing will be within XO. Thanks.

I knew (from your vids, actually) Xen has been around awhile, but I guess I wasn't aware XO has been. Thought that's only been out about 5yrs or so. I'm still frustrated at my testings so far, but not giving up. Hopefully my continued testing come next wk will result in more positive outcomes fingers crossed

Thanks for reaching out!

@lawrencesystems Hi Tom....I actually have watched several of your vids. Thanks for them! I've been in virtualization for quite some time, so I have a decent general understanding; altho, I understand each h/v has its own quirks/bumps. I have also been reading thru both XCP and XO docs. There isn't much details in them tbh. But again, there isn't too much in Xen central mgmt tools either.

I know Xen's been around a while, as well as its central mgmt (XenCenter), but XO hasn't (really). Pools in XO seem to be kind of klunky; at least it's been that way to me playing around in it. I've rebuilt my 2 Hosts again for a 3rd time and re-added them to XO. I have yet to consolidate them into 1 single Pool again though. I'll re-attempt things again on Mon. One thing which "may" have caused issues I wasn't fully aware of -> patch installs. I did install them initially, but the msg that pops up says the Host reboots, and in actuality..it doesn't. This time around, I did manually reboot them. Maybe that caused issues?...not sure. Although...I did end up rebooting one of my Hosts multiple times in my prev testings, but that didn't rectify any issues I was having (but I didn't reboot my Master).

I'll update here if I continue to have issues. Thanks!

I'm in the early stages of testing XCP/XO (on Sources) for possible VMW migration in the future. I have to say...so far, I'm not at all impressed. I haven't even started creating VMs yet and am having all sorts of "bugginess"..just with Pools.

First, I like the fact when adding Hosts to a Pool, and making Network or Storage changes/adds, the change is applied to all Hosts in a Pool. Cool! Aside from that, Pool mgmt just seems to be buggy. Any explanation is appreciated.

My test setup is simplistic:

2 Dell Proliant DL360 G9 Hosts, XCP-NG 8.3 installed via ISO. Easy enough. 2 HBA cards using just 1 port on each for now...1 10Gb port for Mgmt & other networks, and 1 10Gb port on 2nd card for iSCSI storage connection
An Ubuntu 24.04 VM with XO via Sources installed. Again, fairly easy. All good so far.
I then was looking at Storage steps (adding iSCSI) and configuring my Networking to see my SAN & adding an IP to a HBA was not really intuitive at all. Found a post on here to help me through that...after 2hrs of clicking around
So, I think I have my Storage and Networking squared away. Now just needed to create a Pool and get my Hosts in one. This has been klunky to say the least; 1. in how it's done, then 2. Host behavior when in a Pool.
a. Add 2 Hosts to XO. Ok
b. Click Host1 and "go into" its Pool. Change the "Name" to give a more appropriate Pool name for multiple Hosts. Ok (but still a bit klunky in how this works)
c. When in this new Pool, add my Host2 to it. Ok (so far)
d. My Master (Host1) seems to be fine in the Pool; my newly added Slave (Host2) is "yellow" status. It says 'busy'. I go to Advanced tab to try to Enable and it won't (why it isn't already Enabled, I don't know). Host2 also appears to be in Maint Mode. Why? If I click on "Disable Maint Mode" button, it has the same behavior as when I try the "Enable" button...nothing. I can't even 'Detach' this Host2 from the Pool And, this is the 2nd time I've tried these steps. When I was clicking around the 1st time with Pools, my Host2 showed all RAM used (nothing is on any Host) and showed as "halted" or "offline". I ended up reinstalling XCP 8.3 and re-adding to XO. Took care of those error things, but again...still not acting right this time either. Also, does Slave Hosts take the root pwd of the Master? I'm noticing that behavior as well. How is that possible? That isn't a good thing imo. And now, it appears my Host2 lost it's mgmt nic configuration...so another reinstall will seemingly need to happen

And again, I'm just in the setup pieces...not even testing VM creation and management. I really do want this to work ok so I can eventually leave VMW, but I'm not at all confident in this h/v solution to this point. Isn't this supposed to be "stable"? I have my doubts Any suggestions appreciated...

@olivierlambert Ah, ok...thanks, but I'm not using the appliance; I installed XO via source.

@olivierlambert How do I do that? I am literally new to XCP/XO x 1 week