Xen networking problems in -current with xn driver?
julian at freebsd.org
Tue Aug 2 18:12:45 UTC 2016
I upgraded my VPS machine to today's current, and on reboot I couldn't
get into it by network.
A quick switch to the VNC console showed that it was up but that it
couldn't get out.
The xn interfaces said they were UP but attempts to get out were met
with "network is down".
if I did 'tcpdump -n -i xn0' (and xn1) hten all was fine again.
tcpdump saw packets, and in fact ipfw saw some packets coming in even
before that but it was not possible to send.
Has anyone seen similar?
some relevant parts of the dmesg output.:
T(vga): text 80x25
XEN: Hypervisor version 3.4 detected.
CPU: Intel(R) Xeon(R) CPU E5620 @ 2.40GHz (2400.05-MHz
Origin="GenuineIntel" Id=0x206c2 Family=0x6 Model=0x2c Stepping=2
Hypervisor: Origin = "XenVMMXenVMM"
real memory = 536870912 (512 MB)
avail memory = 503783424 (480 MB)
Event timer "LAPIC" quality 400
ACPI APIC Table: <Xen HVM>
WARNING: L1 data cache covers less APIC IDs than a core
0 < 1
WARNING: L2 data cache covers less APIC IDs than a core
0 < 1
WARNING: L3 data cache covers less APIC IDs than a core
0 < 1
ipfw2 (+ipv6) initialized, divert loadable, nat enabled, default to
deny, logging disabled
xs_dev0: <Xenstore user-space device> on xenstore0
xenbusb_front0: <Xen Frontend Devices> on xenstore0
xn0: <Virtual Network Interface> at device/vif/0 on xenbusb_front0
xn0: Ethernet address: 00:16:3e:01:99:54
xn1: <Virtual Network Interface> at device/vif/1 on xenbusb_front0
xn1: Ethernet address: 00:16:3e:01:9a:54
xenbusb_back0: <Xen Backend Devices> on xenstore0
xenballoon0: <Xen Balloon Device> on xenstore0
xctrl0: <Xen Control Device> on xenstore0
xn0: backend features: feature-sg feature-gso-tcp4
xn1: backend features: feature-sg feature-gso-tcp4
xbd0: 20480MB <Virtual Block Device> at device/vbd/768 on xenbusb_front0
xbd0: attaching as ada0
xbd0: features: write_barrier
xbd0: synchronize cache commands enabled.
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