[PVE-User] kernel not routing bridge connections

Dietmar Maurer dietmar at proxmox.com
Fri Jun 8 06:24:19 CEST 2012

What network card do you have? We recently updated intel e1000e/igb/ixgbe drivers, and some users already reported problems with that.

From: pve-user-bounces at pve.proxmox.com [mailto:pve-user-bounces at pve.proxmox.com] On Behalf Of Guy
Sent: Donnerstag, 07. Juni 2012 20:15
To: Fábio Rabelo
Cc: pve-user at pve.proxmox.com
Subject: Re: [PVE-User] kernel not routing bridge connections

hmm.. good thinking.. however...

it's commented out currently, and with the older kernel it's still working..

I've not tried to uncomment it and use the new kernel though.


On 7 Jun 2012, at 19:07, Fábio Rabelo wrote:

Just a thought :

To get bridges work kernel must accept packages forward, and in Debian Family you need to edit /etc/sysctrl and uncoment :


To make it work, check it !

Fábio Rabelo

2012/6/7 Guy <guy at britewhite.net<mailto:guy at britewhite.net>>
Hello... Me again!

I run my proxmox systems with many VLAN bridged interfaces...eg.

vmbr10  eth2.4010

I have lots of these and all works really well..until... I rebooted the system and when it came back it was running a newer kernel.

Linux fevirt 2.6.32-12-pve #1 SMP Tue Mar 20 09:25:26 CET 2012 x86_64 GNU/Linux

it seems that when I have this kernel running, I can ping between the KVM images but not traffic comes into the systems, I found this by TCP dumping the network... I could see loads of ARP requests leaving the KVM image.. and I can see them on the edge routers and the responses.. but they never made it back to the system.

I finally rebooted the proxmox and selected the previous kernel..

Linux fevirt 2.6.32-10-pve #1 SMP Tue Mar 20 09:25:26 CET 2012 x86_64 GNU/Linux

and now it's all working again!.

Let me know if you need anything more.

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