[PVE-User] Proxmox VE 4.2-2, 10Gbit Fibre, No LAN Connection in VM

Ulf Weikert weik at bbs-haarentor.de
Wed Nov 16 15:44:00 CET 2016



On 16.11.2016 13:47, Alexandre DERUMIER wrote:
> maybe you can use tcpdump on vmbrX, and see if you see dhcp queries/responses ?
While running the command, I unplugged the sfp module and put it back
in. This is the outcome.

root at VMC-01-SN:~# tcpdump -i eth4
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth4, link-type EN10MB (Ethernet), capture size 262144 bytes
^C
0 packets captured
2 packets received by filter
0 packets dropped by kernel

root at VMC-01-SN:~# tcpdump -i vmbr4
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on vmbr4, link-type EN10MB (Ethernet), capture size 262144 bytes
^C
0 packets captured
2 packets received by filter
0 packets dropped by kernel

tcpdump -i eth1 (Interface for the productive system) shows expected
behavior. All kinds of traffic which matches the services that are
running on the VM.

>
> does it work with static ip ?
In the VM, no.
On the host due to the kernel bug I linked to in my first mail, I'm not
able to restart the interface seperately.
Afaik for know the only way to set an IP on eth4 is to "reboot -f" the
host. Which is something I can not due right now because there are
productive systems on it. Maybe weekend.
>
>
> ----- Mail original -----
> De: "Ulf Weikert" <weik at bbs-haarentor.de>
> À: "proxmoxve" <pve-user at pve.proxmox.com>
> Envoyé: Mardi 15 Novembre 2016 19:16:24
> Objet: [PVE-User] Proxmox VE 4.2-2, 10Gbit Fibre, No LAN Connection in VM
>
> Hey there, 
>
> I'm running Proxmox VE 4.2-2 on a HP DL380 G8. 
> Yesterday I installed a new 10Gbit HP 560SFP+ Dual Port Fibre NIC. 
> Which lead me to this bug [0], [1]. 
>
> But since the card is displayed in my Proxmox Webinterface, I think it 
> should work at least. 
>
>
> So I configured my KVM Container and installed Windows Server 2012 R2 VM 
> according to the best practices wiki [2]. 
>
> After Installation however the NIC in the VM does not receive an IP. 
> The DL 380 host is directly attached to our coreswitch via fibre channel. 
>
> To make sure DHCP is working on the coreswitch port I plugged in some 
> old 1 GBit SFP modules. Connected it to an equally old 24 port Switch. 
> And plugged my notebook in the RJ45 port. DHCP works fine there. 
>
> So in theory it should work in my VM as well. But for some reason it 
> doesn't. See screenshot [3] 
> See my Proxmox Host and VM Setup. [4] & [5]. 
>
> I tried using OVS Bridge instead of Linux Bridge as suggested in [0]#20, 
> but that didn't work either. 
>
> I'm thankful for any tip or advice you can give me. 
>
>
> [0] https://forum.proxmox.com/threads/no-reboot-with-4-4-pve-kernel.27908/ 
> [1] https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1616107 
> [2] https://pve.proxmox.com/wiki/Windows_2012_guest_best_practices 
> [3] https://postimg.org/image/bmh7iooxp/ 
> [4] https://postimg.org/image/l8aryzg3h/ 
> [5] https://postimg.org/image/z392hgail/ 
>

-- 
Freundliche Grüße
 
Im Auftrag
Ulf Weikert
Systemadministrator
Berufsbildende Schulen Haarentor der Stadt Oldenburg
Ammerländer Heerstr. 33-39 | 26129 Oldenburg
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