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I have installed a Freebsd guest using hvm in xen running on Debian 10 and have the xenbr0 bridge configured at boot using network/interfaces file.

I am having trouble getting my guest to boot into multiuser mode and believe it has something to do

with my nic driver (xn). In single user mode, I can configure an IP address and ping the host bridge.

Doing troubleshooting is difficult because the vif on the host won’t stay assigned as a port in the xenbr0

bridge.

I do “brctl show” and the interface isn’t a member so I do “brctl addif” and it assigned. Then I can do my ping

Etc.. but soon afterwards it gets removed by some software that is running. Not sure if it is the hypervisor or what.

I can see messages in /var/log/messages but there is output in xenstored-access.log.

Even when I am not doing anything on the host or on the guest. It just gets removed.

The other thought I had was to change the model for the vif to e1000 so the system would boot cleanly

and hopefully have a stable connection. But adding “model=e1000” in the vif configuration of the

domain’s config file, shutting down, and creating the domain again, doesn’t change the nic driver;

the guest kernel still sees xn0. I had seen via on-line search that I can use

xl set-parameters uuid … platform-nic=e1000

but the program cores. So, I must not be entering the command correctly.

Here is the information I gathered:

root@xen:/etc/xen# xl list -v

Name ID Mem VCPUs State Time(s) UUID Reason-Code Security Label

Domain-0 0 12001 8 r----- 14055.6 00000000-0000-0000-0000-000000000000 - -

UCD_t1_Domain 21 4096 4 -b---- 113.0 a697608c-3e7c-4b08-8aa6-d6125562a25e - -

root@xen:/etc/xen# xl network-list 21

Idx BE Mac Addr. handle state evt-ch tx-/rx-ring-ref BE-path

0 0 00:16:3e:00:00:11 0 4 13 784/785 /local/domain/0/backend/vif/21/0

root@xen:/etc/xen# brctl show

bridge name bridge id STP enabled interfaces

xenbr0 8000.f28587ae759e no eth1

Here is the domain config file:

root@xen:/etc/xen# cat ucd.cfg

arch_libdir= 'lib64'

builder='hvm'

memory=4096

name="UCD_t1_Domain"

vcpus=4

vif = [ 'mac=00:16:3e:00:00:11, bridge=xenbr0, model=e1000' ]

disk = [ '/home/admin/tmp/ucd.img,raw,hda,rw', '/home/admin/tmp/install.iso,raw,hdc:cdrom,r' ]

_on_poweroff_ = 'destroy'

_on_reboot_ = 'restart'

_on_crash_ = 'preserve'

boot = "cd"

snapshot=1

sdl = 0

vnc = 1

vnclisten="192.168.21.9"

vncpasswd=''

serial='pty'

Here is the vif being removed:

root@xen:/etc/xen# brctl show

bridge name bridge id STP enabled interfaces

xenbr0 8000.f28587ae759e no eth1

root@xen:/etc/xen# brctl addif xenbr0 vif21.0

root@xen:/etc/xen# brctl show

bridge name bridge id STP enabled interfaces

xenbr0 8000.f28587ae759e no eth1

vif21.0

-------------- var/log/messages

Jun 17 16:30:35 xen kernel: [1301259.952042] xenbr0: port 2(vif21.0) entered disabled state

Jun 17 16:30:35 xen kernel: [1301259.952241] device vif21.0 entered promiscuous mode

Jun 17 16:30:35 xen kernel: [1301259.952335] xenbr0: port 2(vif21.0) entered blocking state

Jun 17 16:30:35 xen kernel: [1301259.952339] xenbr0: port 2(vif21.0) entered forwarding state

Jun 17 16:31:24 xen kernel: [1301308.580201] device vif21.0 left promiscuous mode

Jun 17 16:31:24 xen kernel: [1301308.580270] xenbr0: port 2(vif21.0) entered disabled state

root@xen:/etc/xen# brctl show

bridge name bridge id STP enabled interfaces

xenbr0 8000.f28587ae759e no eth1

Any ideas?

Thanks

domU interface does not remain in xenbr0